Institute of Physics of Materials AS CR, v. v. i. > Groups > Special Issues of Fracture Mechanics and Materials‘ Fatigue (FRACTIGUE)

Special Issues of Fracture Mechanics and Materials‘ Fatigue (FRACTIGUE)

Headdoc. Ing. Stanislav Seitl, Ph.D.
E-mail [javascript protected email address]
Phone number+420 532 290 417

The research group focuses on determining the fracture mechanical and fatigue properties of materials beyond normal testing. In the case of fatigue loading of metals, it is beyond 107 cycles, in the case of concrete, for which fatigue tests are not normally performed, it is actually more than 1 cycle. Under these conditions, research into the relationship between the structure and properties of materials and failure mechanisms is very topical, especially for cases of new materials produced by additive technologies and for concrete building materials. Gigacycle fatigue materials research can serve as a source of material data for applications where a high number of cycles is critical, as well as for applications where high load frequency plays an important role. Within the group, we also focus on the assessment of stress concentrators related to shape changes or material changes (inclusions, interfaces in composites, etc.) in cases that have not yet been studied. In particular, we use and develop methods of generalized linear elastic fracture mechanics and methods of finite fracture mechanics, which always apply methods of assessing the stability of general stress concentrators in / at finite distances from the point of highest stress.


NamePhone numbersRoomsE-mail
doc. Ing. Jan Klusák, Ph.D. +420 532 290 348118 [javascript protected email address]
Ing. Lucie Malíková, Ph.D. +420 532 290 430603 [javascript protected email address]
Ing. Jan Mašek, Ph.D. +420 532 290 430603 [javascript protected email address]
Ing. Petr Miarka, Ph.D. +420 532 290 430603 [javascript protected email address]


NamePhone numbersRoomsE-mail
Pavel Cejnek +420 532 290 361107 [javascript protected email address]

Phd students

NamePhone numbersRoomsE-mail
Ing. Pavel Doubek +420 532 290 417316
Ing. Kamila Kozáková +420 532 290 367604 [javascript protected email address]
Ing. Mohammad Sami Al Khazali +420 532 290 336128b [javascript protected email address]

Diploma students

NamePhone numbersRoomsE-mail
Bc. Anna Benešová +420 532 290 417316

Project numberNameInvestigator
4000138900/22/NL/GP/gg Characterisation of Thermal and Mechanical Performance of SIM Cryostat Strapsdoc. Ing. Jan Klusák, Ph.D.
8J22AT008 Mechanical fracture quantification of role of hemp fibres on self-healing processes in selected composites (KvaRK)doc. Ing. Stanislav Seitl, Ph.D.
21-14886S Influence of material properties of high strength steels on durability of engineering structures and bridgesdoc. Ing. Stanislav Seitl, Ph.D.
21-08772S Influence of Self-Healing effects on structural fatigue life extension of structures made from high performance concrete (InShe)doc. Ing. Stanislav Seitl, Ph.D.


Project numberNameInvestigator
CZ.01.1.02/0.0/0.0/20_321/0024649 Ultrasonic devices for gigacycle fatigue testing of materialsdoc. Ing. Jan Klusák, Ph.D.
8J20AT013 Integrity and durability aspects of recycled aggregates composites (InDuRAC)doc. Ing. Jan Klusák, Ph.D.
20-00761S Influence of material properties of stainless steels on reliability of bridge structuresdoc. Ing. Stanislav Seitl, Ph.D.
8J18AT009 Failure initiation and fracture of quasi-brittle building materials (FInFraM)Ing. Lucie Malíková, Ph.D.
CZ.01.1.02/0.0/0.0/15_019/0004505 Complex design of girders from advanced concretesdoc. Ing. Stanislav Seitl, Ph.D.
17-01589S Advanced computational and probabilistic modelling of steel structures taking account fatigue damagedoc. Ing. Stanislav Seitl, Ph.D.
16-18702S AMIRI − Aggregate-Matrix-Interface Related Issues in silicate-based compositesdoc. Ing. Jan Klusák, Ph.D.
CZ.1.07/2.3.00/45.0040 Science Academy - critical thinking and practical application of scientific and technical knowledge in real lifedoc. Ing. Jan Klusák, Ph.D.
7AMB1-4AT012 Development of new testing configurations for determination of relevant values of fracture characteristics of cementitious composites (DeTeCon)doc. Ing. Stanislav Seitl, Ph.D.
M100411204 Utilization of termographic techniques and advance probabilistic method for the efficient estimation of Wöhler curve parametersdoc. Ing. Stanislav Seitl, Ph.D.
P105/11/0466 Energetic and stress state aspects of quasi-brittle fracture – consequences for determination of fracture-mechanical parameters of silicate compositesdoc. Ing. Stanislav Seitl, Ph.D.
P104/11/0833 Response of cement based composites to fatigue loading: advanced numerical modeling and testingdoc. Ing. Stanislav Seitl, Ph.D.
P108/10/2049 Crack initiation and propagation from interface-related singular stress concentratorsdoc. Ing. Jan Klusák, Ph.D.
M100410901 Fracture mechanics description of three dimensional structures: numerical analysis and physical consequences of constraintdoc. Ing. Stanislav Seitl, Ph.D.
KJB200410901 Fracture of silicate based composites studied on core drilled specimens – numerical-modeling background for advanced fracture parameters determinationdoc. Ing. Stanislav Seitl, Ph.D.
101/08/1623 Innovative techniques for assessment of residual life of bodies with fatiguedoc. Ing. Stanislav Seitl, Ph.D.
101/08/0994 Determination of conditions of failure initiation in bi-material wedges composed of two orthotropic materialsdoc. Ing. Jan Klusák, Ph.D.
103/08/0963 Basic fatigue characteristic and fracture of advanced building materialsdoc. Ing. Stanislav Seitl, Ph.D.
101/04/P001 The influence of constraint on threshold values of the stress intensity factordoc. Ing. Stanislav Seitl, Ph.D.
106/03/P054 Linear Elastic Fracture Mechanics of Bi-material notchesdoc. Ing. Jan Klusák, Ph.D.


Servohydraulic system Zwick/Roell Amsler HC25, push-pull

Contact person: prof. Ing. Pavel Hutař, Ph.D.
Compact table model of servo-hydraulic pulsator dedicated for static and dynamic material testing. Pulsator is capable to load the specimen by forces up to 25 kN. Maximum stroke of grips is 250 mm. Testing device is able to control mechanical tests in control regime of force or displacement. Electronic controlling system enables tailoring of a course of the mechanical test according to operator needs. Zwick/Roell Amsler HC25 is mainly determined for fatigue tests with low frequencies and with needs of fine level of control.

Ultrasonic system for very high cycle fatigue measurements

Contact person: doc. Ing. Jan Klusák, Ph.D.
Ultrasonic fatigue system pulsating at frequency of 20 kHz. This allows real-time measurement of very high cycle fatigue properties of materials at the number of cycles between 10 million to 10 billion. Measurement is possible under tension/compression and tension/tension conditions. It enables the measurement of SN (Wöhler) curves and fatigue crack propagation rates.

Resonant system Fractronic 7801, 100 kN, push-pull, temperature up to 800°C

Contact person: prof. Ing. Pavel Hutař, Ph.D.
Electromagnetic resonant pulsator mainly for fatigue tests at high temperatures. Movable crosshead with possible recording of its position enables to measure cyclic creep curves and also conducting tests with periodical changes of mean load (i.e. suitable for combined cyclic tests). Test frequency ranges from 100 to 130 Hz.


Kozáková K., Klusák J., Fintová S.: The length parameter for gigacycle fatigue life predictions of notched specimens made of 304L steel. Int. J. Fatigue 178 (2024) 107980

Klusák J., Fintová S., Kozáková K., Jambor M., Seitl S.: Risk volume effect in very high cycle fatigue of 304L stainless steel. Int. J. Fatigue 178 (2024) 108016


Vyhlídal M., Klusák J., Kucharczyková B., Daněk P., Šimonová H., Keršner Z.: Influence of the interfacial transition zone between a steel inclusion and cement-based composite on the fracture response of a bent specimen. Eng. Fract. Mech. 286 (2023) 109256

Miarka P., Cruces A., Lopez-Crespo P., De Corte W.: On the localisation of the FPZ under a pure mode II load identified by a hybrid method. Eng. Fract. Mech. 279 (2023) 109019

Miarka P., Seitl S., Klusák J., Malíková (Šestáková) L., Merta I., Bílek V.: High-cycle fatigue cracks in concrete investigated by micro cT tomography.. Procedia Struct. Integr. 43 (2023) 124-129

Juhászová T., Miarka P., Jindra D., Kala Z., Seitl S.: Evaluation of fatigue crack growth rates in an IPE beam made of AISI 304 under various stress ratios. Procedia Struct. Integr. 43 (2023) 172-177

Miarka P., Cruces A., Lopez-Crespo P., De Corte W.: Fracture process zone development and length assessment under the mixed-mode I/II load analysed by digital image correlation technique. Cement and Concrete Research 173 (2023) 1-22

Gruber K., Szymczyk-Ziołkowska P., Dziuba S., Duda S., Zielonka P., Seitl S., Lesiuk G.: Fatigue crack growth characterization of Inconel 718 after additive manufacturing by laser powder bed fusion and heat treatment. Int. J. Fatigue 166 (2023) 107287

Klusák J., Kozáková K., Jambor M., Seitl S.: Fatigue behavior of DIN 1.4307 and DIN 1.4306 stainless steels under high frequency loading. Procedia Struct. Integr. 43 (2023) 142-147

Seitl S., Horník V., Lesiuk G., Kunz L.: Influence of micro-structure of selected components made from AISI 304 on the mechanical properties. Procedia Struct. Integr. 43 (2023) 113-118

Sarkar A., Klusák J., Kozáková K., Christ H.: Very high cycle fatigue behavior of austenitic stainless steel in annealed and predeformed condition. Materials Performance and Characterization 12 (2023) MPC20220


Seitl S., Pokorný P., Klusák J., Duda S., Lesiuk G.: Effect of specimen thickness on fatigue crack growth resistance in Paris region in AISI 304 steel. Structural. Integr. 24 (2022) 291-297

Malíková (Šestáková) L., Doubek P., Juhászová T., Klusák J., Seitl S.: Interaction of a fatigue crack and a corrosion dimple in a high-strength steel specimen. Procedia Struct. Integr. 42 (2022) 1082-1089

Klusák J., Kozáková K., Fintová S., Seitl S.: Fatigue lifetimes of 1.4306 and 1.4307 stainless steels subjected to ultrasonic loading. Procedia Struct. Integr. 42 (2022) 1369-1375

Seitl S., Benešová A., Blasón Gonzáles S., Miarka P., Klusák J., Bílek V.: Advanced statistical evaluation of fatigue data obtained during the measurement of concrete mixtures with various water-cement ratio. Engineering mechanics 2022 1 (2022) 361-364

Seitl S., Pokorný P., Benešová A., Juhászová T., Kala Z.: Variance of selected properties from various structural elements made from AISI 304. Trans. VSB TU Ostrava Ser. 22 (2022) 39-44

Kozáková K., Fintová S., Klusák J.: Fatigue life of notches: an effect of manufacturing. Procedia Struct. Integr. 42 (2022) 270-275

Kozáková K., Klusák J.: Fracture mechanics assessment of notches subjected to very high-cycle fatigue loading. Structural. Integr. 24 (2022) 299-305

Seitl S., Benešová A., Paredes Pascual Á., Malíková (Šestáková) L., Bujdoš D., Bílek V.: Fatigue and fracture properties of concrete mixtures with various water to cement ratio and maximum size of aggregates. Procedia Struct. Integr. 42 (2022) 1512-1519

Malíková (Šestáková) L., Miarka P., Doubek P., Seitl S.: Influence of the interphase between laser-cladded metal layer and steel substrate on the fatigue propagation of a short edge crack. Frattura ed Integrita Strutturale 59 (2022) 514-524

Juhászová T., Miarka P., Jindra D., Kala Z., Seitl S.: Comparison of crack propagation rates in selected structural components made from AISI 304 grades: Three-point bending test. Procedia Struct. Integr. 42 (2022) 1090-1097

Blasón Gonzáles S., Werner T., Kruse J., Madia M., Miarka P., Seitl S., Benedetti M.: Determination of fatigue crack growth in the near-threshold regime using small-scale specimens. Theor. Appl. Fract. Mech. 118 (2022) 103224

Doubek P., Malíková (Šestáková) L., Seitl S.: Analysis of the material properties in the vicinity of bi-material interface made by the laser cladded protective layer on the S960. Procedia Struct. Integr. 42 (2022) 1529-1536

Miarka P., Seitl S., Bílek V., Cifuentes Bulte H.: Assessment of fatigue resistance of concrete: S-N curves to the Paris law curves. Construction and Building Materials 341 (2022) 127811

Vyhlídal M., Klusák J.: Numerical study of specimen with steel inclusion: Influence of interfacial transition zone. Procedia Struct. Integr. 42 (2022) 1000-1007

Malíková (Šestáková) L., Doubek P., Juhászová T., Seitl S.: Fracture Parameters of a Perpendicular Crack With its Tip Close to a Corrosion Pit. Trans. VSB TU Ostrava Ser. 22 (2022) 30-34

Klusák J., Kopp D.: The role of the surface in crack initiation in sharp and bi-material notches. Structural. Integr. 24 (2022) 315-321


Klusák J., Kopp D.: 3D assessment of surface influence on crack initiation in sharp notches under a mixed mode of loading. Theor. Appl. Fract. Mech. 112 (2021) 102920

Malíková (Šestáková) L., Doubek P., Miarka P., Seitl S.: Crack behaviour at the interface of a surface layer applied ona steel substrate by laser cladding. IOP Conference Series: Materials Science and Engineering 1209 (2021) 12049

Juhászová T., Malíková (Šestáková) L., Doubek P., Miarka P., Seitl S.: Fatigue behaviour of a short crack in a thin protective layer laser-cladded on a steel substrate. Trans. VSB TU Ostrava Ser. 21 (2021) 25-28

Juhászová T., Miarka P., Seitl S.: Non-traditional geometry for wedge-splitting test. Trans. VSB TU Ostrava Ser. 21 (2021) 1-5

Braet L., Juhászová T., Jindra D., Miarka P., Seitl S.: Finding the optimal stress state of a stainless-steel IPE profile for fatigue experiments. Procedia Struct. Integr. 33 (2021) 1065-1072

Seitl S., Andrade Lizarro J., Miarka P.: Mixed Mode I/II Fracture Resistance of Various Civil Engineering Materials by Selected Criteria. Procedia Struct. Integr. 33 (2021) 312-319

Klusák J., Horník V., Lesiuk G., Seitl S.: Comparison of high- and low-frequency fatigue properties of structural steels S355J0 and S355J2. Fatigue Fract. Eng. Mater. Struct. 44 (2021) 3202-3213

Malíková (Šestáková) L., Miarka P., Kucharczyková B., Šimonová H.: Williams expansion utilized for assessment of crack behaviour under mixed-mode loading in alkali-activated fine-grained composite. Fatigue Fract. Eng. Mater. Struct. 44 (2021) 1151-1161

Kozáková K., Klusák J.: The Prediction of Fatigue Life of Notched Specimens. Trans. VSB TU Ostrava Ser. 21 (2021) 29-35

Fernandéz G., Miarka P., Seitl S.: Influence of thickness on the values of stress intensity factor in compact tension specimen. Trans. VSB TU Ostrava Ser. 2021 (2021) 54-59

Malíková (Šestáková) L., Miarka P., Doubek P., Seitl S.: Influence of the bi-material interface on the crack propagation through a thin protective layer. Procedia Struct. Integr. 33 (2021) 605-612

Lopez-Crespo C., Cruces A., Seitl S., Moreno B., Lopez-Crespo P.: Estimation of the Plastic Zone in Fatigue via Micro-Indentation. Materials 14 (2021) 5885

Jindra D., Kala Z., Kala J., Seitl S.: Experimental and Numerical simulation of a Three Point Bending Test of a Stainless Steel Beam. Transportation Research Procedia 55 (2021) 1114-1121

all publications