Summary of professional accomplishments

Transkrypt

1 Summary of professional accomplishments 1. Name, surname : Jarosław Gałkiewicz 2. Degrees: Master of science in Mechanical Engineering in the field Applied Computer Science, subject Fracture Mechanics ; M.Sc. thesis The application of V-notched specimens for evaluation of the fracture toughness supervised by Prof. Andrzej Neimitz, Faculty of Mechanical Engineering, Kielce University of Technology, 1997 Doctor of Philosophy in Mechanics; Ph.D. thesis: The influence of constraints on fracture toughness of structural components supervised by Prof. Andrzej Neimitz, Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology, Employment: Assistant in Department of Fundamentals in Machine Design, Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology 2005-present Adjunct (assistant professor) in Department of Fundamentals in Machine Design, Faculty of Mechatronics and Mechanical Engineering, Kielce University of Technology 4. Achievement (according to art. 16 of Act on academic degrees and academic title and degrees and title art of 14 march 2003): part A (List of selected papers) a.1. Gałkiewicz J., Graba J., Algorithm for determination of ~ n,θ, n,θ σ ij ~, ~ n,θ, d n n, I n n functions in Hutchinson-Rice-Rosengren solution and its u i 3d generalization, Journal of Theoretical And Applied Mechanics, 44, 1,19-30, Warsaw, 2006 ε ij 1/20

2 a.2. Graba M., Gałkiewicz J., Influence of the crack tip model on results of the finite elements method, Journal of Theoretical And Applied Mechanics, 45, 2, pp , Warsaw, 2007 a.3. Neimitz A., Graba M., Gałkiewicz J., An alternative formulation of the Ritchie-Knott-Rice local fracture criterion, Engineering Fracture Mechanics, 74, , 2007 a.4. Neimitz A., Gałkiewicz J., Approximation of the tensile strain-stress curves in front of a crack in a non-linear material. International Journal of Fracture, 161: , DOI /s , 2010 a.5. Neimitz A., Galkiewicz J., The Analysis of Fracture Mechanisms of Ferritic Steel 13HMF at Low Temperatures, Journal of ASTM International, Vol. 7, No. 5, Paper ID JAI102470, 2010 a.6. Neimitz A., Galkiewicz J., Dzioba I., The ductile-to-cleavage transition in ferritic Cr Mo V steel: A detailed microscopic and numerical analysis, Engineering Fracture Mechanics Volume 77, Issue 13, September, , 2010 a.7. Galkiewicz J., Simulation of Tensile Test of The 1/2Y Welded Joint Made of Ultra-High Strength Steel, Materials Science Forum, Vol. 726, pp , 2012, Trans Tech Publications, Switzerland, doi: / a.8. Galkiewicz J., The Simulation of Void Growth along Curvilinear Crack Front, Key Engineering Materials Vol. 598, pp , Trans Tech Publications, Switzerland; doi: / a.9. Pała R., Gałkiewicz J., Temperature Influence on σ 0 and n Characteristics in the R-O Relationship for High-Strength Steel, Key Engineering Materials Vol. 598, pp , Trans Tech Publications, Switzerland; doi: / a.10. Galkiewicz J. The Influence of In-Plane Constraint on Void Behavior in Front of a Crack in Plane Strain, Solid State Phenomena Vol. 224, pp , Trans Tech Publications, Switzerland doi: / a.11. Gałkiewicz J., Microscopically Based Calibration of the Cohesive Model, Journal of Theoretical And Applied Mechanics in press 2/20

3 Part B (description of scientific purposes) Title: Numerical modeling of fracture phenomena The modeling of fracture processes requires a multidimensional approach. It begins from the material definition, takes into account the proper geometry description and concentrates on the crack tip region. Finally, the features at the micro-level, influencing the fracture process that usually are not considered in the finite element calculations should be taken into account. The finite element model of the crack tip domain should guarantee results of computations that are independent of the mesh size. This problem was approached in the paper [a.2]. The theory based on the J-integral assumes a sharp crack tip and small strains. These two assumptions result in the singular stress and strain fields in front of the crack and they put certain restrictions on the J-integral path independence. The Hutchinson, Rice and Rosengren s (HRR) approaches lead a mathematical representation of the stress and strain field. In a case of ductile fracture, to achieve more realistic stress distribution at small distances from the crack tip, one should assume a finite strain. This assumption causes that the stress distribution is different than in the HRR field. The stress tensor components become finite, with the maximum value at a certain distance from the crack tip. Location and the value of the stress maximum depend on the material properties and loading. However, to achieve proper results the suitable mesh is required in the vicinity of a crack tip. Finite element mesh should be composed of concentric circles or semi-circles divided in radial direction. For the correct mapping of the stress distribution ahead of the crack tip the size of elements in the radial direction should not exceed 10 percent of the crack tip opening displacement in a critical moment. The number of elements in the angular direction does not influence the results, provided it is a reasonable one. Another feature of the finite element model, considered in the paper [a.2] is a crack tip shape. It could be modeled either as a point, semicircle or quarter of a circle. Computations proved that the best selection is a quadrant. It allows for computations with a smaller radius of the crack tip then when 3/20

4 a semicircle is used and the crack tip radius has only a small influence on the resultant final crack tip opening displacement. The last issue concerning the finite element modeling, discussed in the paper [a.2], is evaluation of the J-integral. In the finite element method computer codes there are two methods of the J-integral computation. In the line contour method the J-integral is evaluated along the chosen path, while in the virtual crack extension method a physical meaning of the J-integral as a change of the potential energy of a system due to the infinitesimal crack extension da is adopted. Technically, the latter method is accomplished by the virtual shift of nodes inside the selected contour. The virtual crack extension method turns out to be more effective and less sensitive to the mesh quality. Results of the paper [a.2] help to build the proper numerical models leading to the reliable results. The stress distributions obtained numerically differ considerably from those obtained with the analytical formulae both for elastic and elastic-plastic cases. The measure of this difference is so called the Q-parameter (plane strain). The value of the Q-parameter can be evaluated according to the formula: Q MES HRR, (1) 0 MES where is the opening stress obtained numerically, considered as a real, exact" value at a distance r 2J / 0 from the crack tip, HRR is a theoretical value of the opening stress computed at the same distance using HRR formula (2) [Hutchinson, J.W., Singular Behaviour at the End of a Tensile Crack in a Hardening Material, Journal of the Mechanics and Physics of Solids, 16, pp.13-31,1968; Rice, J.R., Rosengren, G.F., Plane Strain Deformation Near a Crack Tip in a Power-law Hardening Material, Journal of the Mechanics and Physics of Solids, 16, pp.1-12, 1968], and 0 is yield stress. ij J 1 Inr n ~ 0 ij,n... (2) 4/20

5 where: r and are coordinates in polar coordinate system with the origin at the crack tip, and n are Ramberg-Osgood constants, ~ij,n describes angular changes of selected tensor component, I n is a quantity obtained numerically, and 0 is a strain corresponding to the yield stress. In the formula (2) the values of the parameter I n and function ~ij,n are the most difficult to obtain. Both quantities depend on material properties. Unfortunately, the only source with a limited number of solutions for I n and ~ij,n is the catalogue [Shih C.F., Tables of Hutchinson-Rise-Rosengren singular field quantities, Brown University Report, MRL E-147, 1983]. This raise a need for the computer code to compute the HRR parameters for any material chosen. The code has been developed for several years. To create the computer code, the Airy s stress function was applied first. As a result the forth order non-linear homogeneous differential equation was obtained. To solve this equation two initial conditions were assumed: and to satisfy the symmetry of the solution and two other conditions at the end point of a integration range ( and ) were introduced to satisfy the stress-free crack surface requirement. Function describes angular changes of the Airy stress function and is the angular coordinate in the polar coordinate system with the origin at a crack tip. To solve the equation the two unknowns i.e. singularity parameter S and must be found. The differential equation was solved by means of the Runge-Kutty method but the initial values of S and were found adopting the shooting method [Burden R.L, Faires J.D., Numerical Analysis, third edition, PWS-KENT Publishing Company, Boston, 1985]. The final version of the computer code was released in 2006 [a.1]. In addition to the classical solutions for the plane strain and plane stress the code [a.1] allows to evaluate the characteristics of the HRR-like field in the intermediate states due to the introduced by Guo Wanlin triaxiality function Tz ( Tz / 33, where 33 is normal stress tensor component in the thickness direction). Unfortunately, the evaluation of the Q-parameter with the formula (1) was still problematic, due to an ambiguity in the approximation of the real stress-strain curve by the Ramberg-Osgood formula. The proper values of the parameters in the Ramberg-Osgood constitutive relation are required to 5/20

6 evaluate the HRR field parameters. There are several ways to replace the real strain stress curve by the Ramberg-Osgood relation. Different methods lead to considerable discrepancies depending on a selected fragment of the strain stress curve used in the fitting procedure. From the fracture mechanics point of view the materials are similar under similar stress state when the similar strain field has been generated for the same geometry. In our theories concerning the evolution of the microstructure and application of the parameters of this evolution into the marcophenomenological theory, we had to compare two different environments: sharp crack and small strains with blunted crack and finite strains. Using, in the numerical calculation, the real tensile strain stress curve along with a blunted crack tip and finite strains the two points in the stress distribution in front of the crack were selected. Next, by comparing this stress values with the HRR results, when the constraints were large, the Ramberg-Osgood parameters are easy to be found [a.9] The fundamental issue in a material description is the tensile curve properly obtained. The problems with obtaining of proper tensile curve start when the material is not uniform [a.7]. In the paper [a.7] the tensile tests of the welded joints in the high strength steel were assisted by the ARAMIS system. It was impossible to catch the large changes of the material properties in the heat affected zone by the classical tensile tests even using the mini-specimens with the cross-section of 2x4mm. In such a situation the ARAMIS system turns out to be very powerful. It allows to evaluate the properties of arbitrarily small part of the material. The ARAMIS system helped to evaluate series of tensile curves considerably different from those evaluated in a traditional way. The new curves were successfully used in the numerical models to obtain simulations of the fracture processes. They reflected the experimental data. In the Ph.D. thesis [Gałkiewicz J.: Wpływ więzów geometrycznych na parametry charakteryzujące odporność elementu konstrukcyjnego na pękanie, Politechnika Świętokrzyska, 2005] the attention was focused on the influence of the geometry on fracture toughness. The approach to achieve the fracture toughness in a case when the several fracture mechanisms were active simultaneously was presented. However, this approach requires a careful investigation of the fracture mechanisms individually. It was a subject of the next papers. 6/20

7 In a case of the cleavage fracture the idea of the actual fracture toughness evaluation is based on introduced by O Dowd and Shih the Q- parameter [O Dowd, N.P., Shih, C.F., Family of Crack-Tip Fields Characterized by a Triaxiality Parameter II. Fracture Applications, J. Mech. Phys. Solids, vol. 40, No. 5, pp , 1992]. The concept proposed by Ritchie-Knott-Rice (RKR) on the local fracture criterion [Ritchie, R.O., Knott, J.F., Rice, J.R., On The Relationship Between Critical Tensile Stress and Fracture Toughness in Mild Steel, Journal of the Mechanics and Physics of Solids, Vol. 21, pp , 1973] was extended to the large plastic strains. According to this theory the cleavage jump is possible if the opening stress is higher than the critical value over a certain distance from crack tip. Ritchie, Knott and Rice assumed theoretical, asymptotic stress distribution according to HRR theory. However, the real opening stress distribution in front of blunted crack in elastic-plastic material has the maximum value at a certain distance from the crack tip. The most important parameters in the new concept are the critical stress and the critical area(length) where the opening stress is greater than critical value. It was shown in the paper [a.3] that those quantities can be considered the material constants. New relation between the real and standard fracture toughness has now a new form. The experimental study on this subject was based on the investigation of the ferritic steel 13HMF and results were published in [a.5] and [a.6]. Much more difficult to analyze is process of a ductile fracture. The most important results on this subject obtained by author in years were presented in a chapter of the book [a.5] and the paper [a.6]. In this articles the fracture process of Cr Mo V steel at low temperatures was studied. This steel is often used for the power plants instalations. The heat treatment allowed for obtaining various micro-structures i.e. ferritic, ferritic-perlitic, ferritic-bainitic and martensitic. The fracture process was analyzed for two constraint levels, introduced by the proper specimen geometry configuration (i.e. relative crack length a/w=0.2 and 0.5) and the wide temperature range from C to C. As a result of various constraints different fracture mechanisms were observed. The most interesting cases were those in which the cleavage jumps, after stable ductile crack growth were observed. Three-point-bending specimens were used in the experimental programme. Each test was repeated in the same configuration for several times. Apart from the standard fracture toughness 7/20

8 and J r -curve evaluation, some test were stopped prior to the presumed onset of a cleavage crack jump. After tests, in those selected cases, the fractographic, micro-structural and numerical analyses were performed. For some specimens their thickness were reduced by a slow grinding and polishing and the unique pictures of the stable crack growth were obtained. As a result of the fracture processes analyses, using the proposed criterion, the authors were to able predict not only the onset of the cleavage jump but other modes of fracture (ductile and mixed) as well. The numerical analysis was performed using two numerical models. In the first one a crack was stationary even when the crack extension was observed. That allows for exact modeling of the crack tip zone, including blunting, modeled as a quarter of circle. When the crack length increased the crack length in the model was corrected and the whole analysis was reconsidered. In the second model the crack growth was modeled using the node shift and release technique. The crack tip mesh geometry does not allow to model the blunting process in this case. Both models were equivalent only for stationary cracks. Crack growth introduces distinct differences in the stress distribution. In the latter model the opening stress maximum was greater than in the former case and located closer to the crack tip. During the numerical computations for each material, the critical stress level, c and the critical length, l c, where the opening stress exceeded the critical stress level, to initiate cleavage according to modified RKR model, were evaluated. It was proved that the critical stress level depends on the temperature. However, it should be noted that the critical length does not. According to the analysis the conditions for the mixed crack mechanism and ductile fracture were defined. The ductile fracture mechanism takes place due to the void nucleation, growth and coalescence or by shearing along the slip planes. In the paper [a.8] the void growth in front of a crack was analyzed. Using the experimental data, the geometry of the specimen with a real curvilinear front shape was modeled numerically [a.8]. The several finite elements along crack front were selected for remodeling. The voids were introduced into them. Using displacements computed in the full-scale model the remodeled elements were loaded again. This approach allowed for the simulation of the voids growth. Results obtained during the numerical computations were confronted with the images of the fracture surfaces observed by the scanning microscope. Very good agreement 8/20

9 between experimental observations and the results of the numerical computations should be noted. In the next paper [a.10], concerning a similar problem, the influence of the in-plane constraint on the void's behavior in front of a crack was analyzed. The modified boundary layer approach was used. It helped loading the crack to the assumed level of the J-integral and the in-plane constraint level, represented by the T-stress. Similarly to the paper [a.8] the macro-model provided the boundary conditions at the meso- and micro-scale. The mesoelements, after introducing voids into them, were loaded again but using the much more precise mesh. The results were obtained for the four levels of constraints. It was demonstrated that the voids grew in a narrow region adjacent to the crack front. Only voids located closer than /J from the crack tip revealed the influence of the constraints, since their diameters in the direction parallel to the crack front were distinctively different for the constraint levels analyzed. Results showed also the influence of constraints on the effective stress distribution. For the high constraint level two bands of elevated stress appeared starting from the void surface. For the low constraint the area of the high level effective stresses filled the whole element. Papers [a.8 and a.10] provide an important information from the practical point of view. Thanks to them, it is possible to restrict area of fractographic observations. It is also possible to evaluate the constraint level by the voids shapes. Parallelly to the activities described so far, the efforts to apply the cohesive model in the fracture mechanics were made. Cohesive model is considered as an alternative and a very effective tool for the crack growth simulations. The most important paper, summarizing work in this subject, is [a.11]. In this paper the cohesive model was calibrated by replacing the void inside the equivalent cell with the cohesive model. The calibration was considered successful when the outputs of the two models were identical. The new approach allows for the modification of the cohesive model by taking into account the in-plane constraint parameters (T, Q) and the Lode parameter. The additional analyses of the behavior of the cell with the cohesive element provided information about the influence of the constraint on the energy splitting between the cohesive zone and the plastic deformation. Results 9/20

10 presented in the paper simplify the procedure of cohesive model calibration and, in addition, take into account the micro-structure of the material. 10/20

11 5. Description of other scientific research achievements authorship and co-authorship of the monographs, scientific articles in the international or national journals other then listed in the paragraph 4A: Presented below papers can be classified in the field of fracture mechanics. Following the personal interests and experiences in most of them the numerical methods, namely finite element method was utilized. Several papers concern the fatigue strength assessment according to FITNET procedure as an effect of the author s participation in the European research project. There are also papers concerning the experimental investigations. b.1. Gałkiewicz J., Neimitz A., Analysis of the stress field in front of a notch, Physicochemical Mechanics of Materials, Vol. 34, No. 5, pp , 1998 b.2. Gałkiewicz J., Neimitz A., Analiza pola naprężeń przed frontem karbu, XVII Sympozjum Zmęczenia Materiałów i Konstrukcji, Bydgoszcz-Pieczyska, str , 1998 b.3. Neimitz A., Gałkiewicz J., Lis Z., Molasy R., Mechanika doświadczalna laboratorium, Skrypt 349, Wydawnictwo Politechniki Świętokrzyskiej, Kielce, 1999 b.4. Neimitz A., Gałkiewicz J., Molasy R., The influence of the in-plane constraints on the J resistance curves, Proceedings of the ICF 10, Honolulu, 2001 b.5. Neimitz A., Gałkiewicz J., Wpływ kształtu próbek na poziom naprężeń przed frontem szczelin w materiałach sprężysto-plastycznych, Nr 73, Zeszyty Naukowe Politechniki Świętokrzyskiej, pp , 2001 b.6. Gałkiewicz J., Neimitz A., Numeryczna analiza pól naprężeń przed frontem szczeliny w materiałach sprężysto plastycznych, KomPlasTech2002, Szczawnica, stycznia 2002 b.7. Neimitz A., Gałkiewicz J., Rozkład naprężeń przed frontem szczeliny w ciele sprężysto plastycznym zagadnienie 3D, Bydgoszcz Pieczyska, maj, 2002 b.8. Neimitz A., Dzioba I., Molasy R., Gałkiewicz J., O problemach w analizie procesów pękania materiałów plastycznych, Przegląd Mechaniczny, pp.13-20, lipiec-sierpień /20

12 b.9. Neimitz A., Gałkiewicz J., Dzioba I., Molasy R., Wpływ więzów geometrycznych na odporność elementów konstrukcyjnych na pękanie. Część II. Pękanie ciągliwe, IX Krajowa Konferencja Mechaniki Pękania, Cedzyna, 2003 b.10. Gałkiewicz J., Graba M., Algorytm wyznaczania funkcji ~ij n,, ~ n, n,, ij u ~ i, d n n, I n n w rozwiązaniu HRR i jego 3D uogólnieniu, IX Krajowa Konferencja Mechaniki Pękania, Cedzyna, 2003 b.11. Neimitz A., Dzioba I., Galkiewicz J., Molasy R., A study of stable crack growth using experimental methods, finite elements and fractography, Engineering Fracture Mechanics, Volume 71, Issues 9-10, pp , June-July 2004 b.12. Neimitz A., Galkiewicz J., Fracture toughness of structural components. influence of constraints, Proceedings of the ECF 15, Stockholm, 10 stron, August 2004 b.13. Gałkiewicz J., Graba M., Aproksymowanie rozwiązań 3d przed frontem szczeliny poprzez wprowadzenie więzów w kierunku grubości, XX Sympozjum Zmęczenie i Mechanika Pękania, Bydgoszcz Pieczyska, pp , 2004 b.14. Galkiewicz J., Fracture toughness of structural components. TRANSCOM 2005, Zilina, Slovakia, June-August 2005 b.15. Graba M., Gałkiewicz J., Wpływ modelu wierzchołka pęknięcia na wyniki uzyskane metodą elementów skończonych, X Konferencja Mechaniki Pękania, Wisła, wrzesień 2005 b.16. Neimitz A., Galkiewicz J., Fracture toughness of structural components: influence of constraint, International Journal of Pressure Vessels and Piping, Volume 83, Issue 1, Pages 42-54, 2006 b.17. Neimitz A., Graba M., Gałkiewicz J., Alternatywna wersja lokalnego kryterium pękania Ritchie ego-knott a-rice a, XXI Sympozjum Zmęczenie i Mechanika Pękania, Bydgoszcz-Pieczyska, maj 2006, pp , 2006 b.18. Neimitz A., Graba M., Gałkiewicz J., New Formulation of the Ritchie, Knot and Rice Hypothesis, XVI ECF, Alexandropoulos Location: Greece Date: June-July, 2006 b.19. Gałkiewicz J., Dzioba I., Zastosowanie modelu krytycznego rozmiaru pustki do korekty krzywych FAD, IV Międzynarodowe Sympozjum Mechaniki Zniszczenia Materiałów i Konstrukcji, Augustów, 30 maja 2 czerwca /20

13 b.20. Graba M., Gałkiewicz J., Procedury FITNET - nowa metoda oceny wytrzymałości elementów konstrukcyjnych, XI Krajowa konferencja mechaniki pękania, Kielce/Cedzyna, 9-12 września 2007 b.21. Gałkiewicz J., Zastosowanie modelu kohezyjnego w mechanice pękania na przekładzie programu WARP3D, X Jubileuszowa Konferencja Naukowo- Techniczna: Programy MES we wspomaganiu analizy, projektowania i wytwarzania, Kazimierz Dolny, listopada 2007 b.22. Gałkiewicz J., Application of cohesive model in fracture mechanics by WARP3D, Journal of KONES - Powertrain and Transport, vol. 15, nr 1, Warszawa, 2008 b.23. Gałkiewicz J., Analiza wzrostu pęknięcia za pomocą modelu kohezyjnego w programie WARP3, XXII Sympozjum Zmęczenie i Mechanika Pękania, Bydgoszcz-Pieczyska, str , 2008 b.24. Gałkiewicz J., Charakterystyka modułu zmęczenie elementów konstrukcyjnych zawartego w procedurach FITNET, V Międzynarodowe Sympozjum Mechaniki Zniszczenia Materiałów i Konstrukcji, pp , 3-6 czerwca, Augustów 2009 b.25. Gałkiewicz J., Neimitz A., Aproksymacja wykresów jednoosiowego rozciągania z przystankiem plastyczności przez krzywe potęgowe, XII Krajowa Konferencja Naukowo - Szkoleniowa Mechaniki Pękania, pp.21-22, Kraków, 6 9.IX.2009 b.26. Gałkiewicz J., Analiza zmian prędkości wzrostu pęknięcia za pomocą modelu kohezyjnego, XXIII Sympozjum Zmęczenie i Mechanika Pękania, Bydgoszcz-Pieczyska, ss.35-36, 2010 b.27. Gałkiewicz J., Dzioba I., Analiza pola odkształceń elementów konstrukcyjnych za pomocą systemu ARAMIS, XIII KONFERENCJA Naukowo - Szkoleniowa MECHANIKI PEKANIA, Opole, 5 7.IX.2011, Zeszyty Naukowe Politechniki Opolskiej, Seria: Mechanika, z. 99 Nr kol. 343/2011. b.28. Gałkiewicz J., Pała T., Dzioba I., Właściwości mechaniczne złączy spawanych z ultra wysokowytrzymałych stali ferrytycznych, XXIV Sympozjum Zmęczenie i Mechanika Pękania, Bydgoszcz-Pieczyska, pp.63-72, 2012 b.29. Gałkiewicz J., Symulacja próby rozciągania połączenia spawanego typu 1/2Y ze stali wysokowytrzymałej (przypadek undermaching), XXIV Sympozjum Zmęczenie i Mechanika Pękania, Bydgoszcz-Pieczyska, pp.49-62, /20

14 b.30. Gałkiewicz J., Symulacja próby rozciągania połączenia spawanego typu 1/2Y ze stali wysokowytrzymałej (przypadek evenmaching), XXV Sympozjum Mechaniki Eksperymentalnej Ciała Stałego, pp , Jachranka, października 2012 b.31. Gałkiewicz J., Symulacja rozwoju pustek wzdłuż krzywoliniowego frontu pęknięcia, 14 Krajowa Konferencja Mechaniki Pękania, Kielce-Cedzyna, pp , 2013 b.32. Pała R., Gałkiewicz J., Wpływ temperatury na własności stali wysokowytrzymałej, 14 Krajowa Konferencja Mechaniki Pękania, Kielce- Cedzyna, pp , 2013 Summary table Article type\authorship individual co-authorship Articles in the list A 1 8 Articles in the list B 4 2 Other articles 0 2 International conferences 1 4 National conferences 7 14 Total The National Science Centre and the Ministry of Science and Higher Education projects: 1. Nr 7 T07C : Określenie metodyki wyznaczania cechy materiału zwanej odpornością na stabilny wzrost pęknięć. Date: r.; research project; co-investigator 2. Nr 8 T07A : Analiza procesów pękania przy uwzględnieniu trójwymiarowego charakteru pól naprężeń i odkształceń przed frontem szczeliny wpływ geometrii. Date: r.; research project; co-investigator 3. Nr KBN 5 T07C : Wykorzystanie uogólnionego modelu Dugdale a do budowy krzywej uszkodzenia (FAD Failure Assessment Diagram). Date: r.; research project; co-investigator 14/20

15 4. Nr KBN 5 T07A : Wpływ więzów geometrycznych na parametry charakteryzujące odporność materiału na pękanie. Date: r.; supervisor research grant, investigator 5. Nr R : Aplikacja wytycznych Workshop Agreement CEN/WS22 i opracowanie procedury oceny rzeczywistej wytrzymałości elementów urządzeń energetycznych zawierających pęknięcia. Date: ; research project; co-investigator 6. Nr N /0106: Wpływ poziomu naprężeń hydrostatycznych i odkształceń przed frontem szczeliny na odporność na pękanie i na mechanizmy zniszczenia stali ferrytycznych. Date: ; research project; co-investigator 7. N N : Rozszerzenie koncepcji krzywych wzorcowych (Master Curves) na stale wysoko-wytrzymałe, Re>800MPa. Date: ; research project; co-investigator 5.3. Summary impact factor: Total Impact Factor according to the year of publication is 6.604, and according to actual value it is Total 5-Year Impact Factor is , and number of points allocated by the Ministry of Science and Higher Education according to year of publication is Citations according to the Web of Science (WoS); Papers were cited 69 times, without self-citations 65 times. ( Results found: 10 Sum of the Times Cited : 69 Sum of Times Cited without self-citations : 65 Citing Articles : 62 Citing Articles without self-citations : 58 Average Citations per Item : 6.90 h-index : H-Index according to Web of Science (WoS); H-Index=5 15/20

16 5.6. International and national research projects; 1. FITNET, Nr GTC , year European thematic network with the objective of developing and extending the use of fitnessfor-service procedures throughout Europe. Consortium was composed of 40 most important European companies and scientific institutes 2. Programme LEONARDO DA VINCI project ILTOF, We prepared together with partners from Italy, Greece and England innovative training courses on fracture mechanics 5.7. International and Polish awards for research or artistic achievements: 1. Rector s of Kielce University of Technology awards for research achievements in Rector s of Kielce University of Technology awards for research achievements in Rector s of Kielce University of Technology awards for research achievements in Rector s of Kielce University of Technology awards for research achievements in Rector s of Kielce University of Technology awards for research achievements in Rector s of Kielce University of Technology awards for research achievements in Talks in international and national conferences. During my professional carrier I delivered 3 presentations at international and 18 presentations at national conferences on fracture mechanics and fatigue 16/20