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+420 532 290 361

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 338108a [javascript protected email address]

Phd students

NamePhone numbersRoomsE-mail
Ing. Pavel Doubek +420 532 290 361107
Ing. Dalibor Kopp +420 532 290 348118 [javascript protected email address]
Ing. Petr Miarka +420 532 290 361107 [javascript protected email address]
Ing. Tomáš Raška +420 532 290 348118

Diploma students

NamePhone numbersRoomsE-mail
Bc. Tereza Juhászová +420 532 290 361107
Bc. Kamila Kozáková +420 532 290 348118

Project numberNameInvestigator
21-08772S Vliv samovyhojovacích účinků na prodloužení životnosti konstrukcí vyrobených z vysokohodnotného betonudoc. Ing. Stanislav Seitl, 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.


Project numberNameInvestigator
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: doc. 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: doc. 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.



Miarka P., Pan L., Bílek V., Seitl S., Cifuentes Bulte H.: Influence of the chevron notch type on the values of fracture energy evaluated on alkali-activated concrete. Eng. Fract. Mech. 236 (2020) 107209

Jambor M., Trško L., Klusák J., Fintová S., Kajánek D., Nový F., Bokůvka O.: Effect of Severe Shot Peening on the Very-High Cycle Notch Fatigue of an AW 7075 Alloy. Metals 10 (2020) 1262

Seitl S., Miarka P., Rozsypalová I., Pokorná K., Keršner Z., Katzer J., Zarzycki P.: Mechanical fracture properties of concrete with lunar aggregate simulant. MATEC Web Conf. 323 (2020) 01014

Miarka P., Seitl S., Horňáková M., Lehner P., Konečný P., Sucharda O., Bílek V.: Influence of chlorides on the fracture toughness and fracture resistance under the mixed mode I/II of high-performance concrete . Theor. Appl. Fract. Mech. 110 (2020) 102812

Miarka P., Cruces A., Seitl S., Malíková (Šestáková) L., Lopez Crespo P.: Evaluation of the SIF and T-stress values of the Brazilian disc with a central notch by hybrid method . Int. J. Fatigue 135 (2020) 105562

Lehner P., Pařenica P., Krejsa M., Křivý V., Brožovský J., Seitl S., Kala Z.: The general procedure of numerical analysis related to a fatigue damage on the cyclically loaded construction. MATEC Web Conf. 310 (2020) 16

Seitl S., Pokorný P., Miarka P., Klusák J., Kala Z., Kunz L.: Comparison of fatigue crack propagation behaviour in two steel grades S235, S355 and a steel from old crane way. MATEC Web Conf. 310 (2020) 34

Seitl S., Miarka P., Bílek V.: Fatigue and fracture mechanical properties of selected concrete for subtle precast structural elements. MATEC Web Conf. 310 (2020) 33

Vyhlídal M., Klusák J.: A crack approaching the edge of the aggregate. Trans. VSB TU Ostrava Ser. 20 (2020) 47-52

Miarka P., Cruces A., Seitl S., Malíková (Šestáková) L., Lopez Crespo P.: Influence of the constraint effect on the fatigue crack growth rate in S355 J2 steel using digital image correlation. Fatigue Fract. Eng. Mater. Struct. 43 (2020) 1703-1718


Ríos J., Leiva C., Ariza M., Seitl S., Cifuentes Bulte H.: Analysis of the tensile fracture properties of ultra-high-strength fiber-reinforced concrete with different types of steel fibers by X-ray tomography. Mater. & Design 165 (2019) 107582

Seitl S., Růžička V., Miarka P., Sobek J.: ANALYSIS OF VARIOUS CHEVRON NOTCH TYPES AND ITS INFLUENCE ON THE LIGAMENT AREA. Trans. VSB TU Ostrava Ser. 19 (2019) 28-34

Vyhlídal M., Klusák J.: The influence of polygonal cavity on fracture behaviour of concrete. Procedia Struct. Integr. 17 (2019) 690-697

Kala Z., Omishore A., Seitl S., Krejsa M., Kala J.: Identification of variation coefficient of equivalent stress range of steel girders with cracks. INTERNATIONAL JOURNAL OF MECHANICS 13 (2019) 69-78

Klusák J., Seitl S.: Very high cycle fatigue tests of high strength steels S355 J0 and S355 J2. Procedia Struct. Integr. 17 (2019) 576-581

Krejsa M., Koktan J., Janas P., Brožovský J., Seitl S., Kala Z., Krejsa V.: Parallelization in DOProC method and its using in probabilistic modelling of fatigue problems. AIP Conference Proceedings 2116 (2019) 120007

Klusák J., Krepl O., Profant T.: An easy and engineering stability criterion of general singular stress concentrators. Theor. Appl. Fract. Mech. 104 (2019) 102341

Seitl S., Miarka P., Šimonová H., Frantík P., Keršner Z., Domski J., Katzer J.: Change of Fatigue and Mechanical Fracture Properties of a Cement Composite due to Partial Replacement of Aggregate by Red Ceramic Waste. PERIODICA POLYTECHNICA-CIVIL ENGINEERING 63 (2019) 152-159

Krepl O., Klusák J.: Multi-parameter failure assessment of a bi-material V-notch-Crack initiation from a free-edge singularity. Theor. Appl. Fract. Mech. 100 (2019) 233-241

Miarka P., Seitl S., Bílek V.: Mixed-mode fracture analysis in high-performance concrete using a Brazilian disc test. Mater. Technol. 53 (2019) 233-238

Seitl S., Miarka P., Pokorný P., Klusák J.: Influence of corrosion on fatigue behaviour of old crane runway steel. The Journal of Strain Analysis for Engineering Design 54 (2019) 416-423

Miarka P., Seitl S., De Corte W.: Notch tip displacements of the concrete Brazilian disc test with central notch analysed by the concrete damaged plasticity model. Theor. Appl. Fract. Mech. 102 (2019) 122-150

Seitl S., Miarka P., Růžička V., Malíková (Šestáková) L., Cruces A., Lopez Crespo P.: Approximation of the crack-tip field in fatigue cracks in bridge steel specimens: DIC analysis of different constraint levels. Frattura ed Integrita Strutturale 49 (2019) 97-106

Profant T., Hrstka M., Klusák J.: Microcrack interaction with circular inclusion and interfacial zone. Frattura ed Integrita Strutturale 48 (2019) 503-512

Ríos J., Cifuentes Bulte H., Leiva C., Seitl S.: Analysis of the mechanical and fracture behavior of heated ultra-high-performance fiber-reinforced concrete by X-ray computed tomography. Cement and Concrete Research 119 (2019) 77-88

Seitl S., Miarka P., Pokorný P., Fintová S., Kunz L.: COMPARISON OF MECHANICAL PROPERTIES OF OLD STEEL FROM TRUSS CRANE RUNWAY WITH S235 AND S355 GRADES. Trans. VSB TU Ostrava Ser. 19 (2019) 56-60

Profant T., Hrstka M., Klusák J.: An asymptotic analysis of crack initiation from an interfacial zone surrounding the circular inclusion. Composite Struct. 208 (2019) 479-497

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