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The influence of T-stress on proporcional factor
 Hutař, Pavel
Relation between crack opening displacement and J integral is of a great importance in fracture mechanics.The basic aim of this paper is to describe an influence of T-stress on proporcional factor. This factor is occured on the J integral and CTOD estimation equations. Specimens with different values of T-stress (compact tension,three point bend and single edge cracked tension) are analysed by finite element method, the factor is calculated as function of corresponding crack length. The influence of different material constants on proporcional factor are analysed by modified boundary layer model. Results are discussed from the point of view of two-parameter fracture mechanics.
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