Lucie Malikova Hana Simonova Barbara Kucharczykova Petr Miarka


A mixed-mode geometry has been chosen to investigate a crack propagation using the multi-parameter fracture mechanics concept. The so-called Williams’ series expansion is used for the crack-tip stress field approximation. It has been shown that application of the generalized fracture mechanics concept can be crucial for materials with specific fracture behaviour, such as elastic-plastic or quasi-brittle one, when fracture occurs not only in the very vicinity of the crack tip, but also in a more distant surrounding. Then, considering the higher-order terms of the Williams’ expansion in fracture criteria (describing the crack stability and/or crack propagation direction) can bring more precise results. The coefficients of the Williams’ expansion must be calculated numerically (for instance by means of the over-deterministic method in this work) for each cracked configuration, which is very time-consuming, and the analysis is very extensive even for a few basic cracked specimen configurations. On the other hand, a suitable choice of the geometrical configuration of the cracked disc enables performing experiments only on the specimens that could prove the theory about the importance of using the higher-order terms.


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    SI: Characterisation of Crack Tip Fields

    How to Cite

    Malikova, L., Simonova, H., Kucharczykova, B., & Miarka, P. (2019). Multi-parameter fracture mechanics: Crack path in a mixed-mode specimen. Frattura Ed Integrità Strutturale, 13(49), 65–73. https://doi.org/10.3221/IGF-ESIS.49.07

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