Numerical analysis of the components of the three-dimensional non-singular stress field at a mixed-type crack tip

Matvienko, Yu. G.; Chernyatin, A. S.; Rasumovskii, I. A.

doi:10.3103/s1052618813040092

Cited by 9 publications

(2 citation statements)

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“…3. The increase of the specimen thickness is 8 times greatly reduces the zz T -stress (up to 75% at M e =0,25), whereas the value of xx T is virtually unchanged [8]. Thus, magnitudes of the zz T -stress have significant correlation with thickness of the specimen and allows taking into account the level of the out-of-constraint which should be included into assessment of the fracture toughness of full-scale structures.…”

Section: The Effect Of Thickness and Loading Mode Mixitymentioning

confidence: 99%

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The effect of thickness on out-of-plane constraint in terms of the T-stress

Matvienko¹

2014

Frattura Ed Integrità Strutturale

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ABSTRACT. The plastic zone is theoretically and numerically analyzed for various combinations of the nonsingular terms xx T to zz T ratios in connection with specimen thickness under mode I loading. The plastic zone size distribution is based on the Mises yield criterion for mode I conditions and mapped in the specimen thickness direction. It is shown that the plastic zone size is affected by the zz T -stress, i.e. there is strong effect of out-of-plane constraint (thickness) on crack tip plastic zones. In addition, to study the effect of thickness and loading mode mixity (mode I and II) of the specimen on the singular (K I , K II ) and the non-singular ( xx T , zz T ) terms along the 3D crack front, three-dimensional stress fields are analyzed by means of finite element analysis. The strong effect of thickness and mixed mode loading conditions on the zz T -stress is observed. At the same time, there is not the effect of thickness on the nonsingular xx T -stress at the same loading conditions.

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Section: The Effect Of Thickness and Loading Mode Mixitymentioning

confidence: 99%

“…To obtain the distribution of the stress intensity factor along the crack front, this procedure is used for a number of planes (x0y) orthogonal to the crack front [7][8][9]. Their location is characterized by local coordinate s along the front and starts from the center of the crack front.…”

Section: Calculation Of Fracture Mechanics Parametersmentioning

confidence: 99%