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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Analysis of the crack initiated from the orthotropic bi-material sharp notch
 Profant, T. ; Klusák, Jan ; Kotoul, M.
Under the consideration of the bi-material notch composed of two orthotropic materials the potential direction of the crack initiated from the notch tip is determined from the maximum mean value of the tangential stresses and local minimum of the mean value of the generalized strain energy density factor in both materials. Following the assumption of the same mechanism of the rupture in the case of the crack and the notch, an expression for the critical values of the generalized stress intensity factor can be obtained. The radial and tangential stresses and strain energy density are expressed using the Lekhnitskii-Eshelby-Stroh (LES) formalism for the plane elasticity. The stress singular exponents and corresponding eigenvectors are the solution of the eigenvalue problem leading from the prescribed notch boundary and compatibility conditions. In generally, there is more than one solution of this eigenvalue problem and consequently the generalized stress intensity factors.
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A study of bi-material notches under a combined loading mode
 Kopp, Dalibor ; Klusák, Jan
In the range of linear elastic fracture mechanics, the conditions for critical loading assessment of structures made of two dissimilar materials are usually based on the assumptions of a prevailing normal mode of loading. The same assumption is usually applied to the stability criterion of bi-material notches. However, in engineering practice there are cases of loading and failure close to the shear mode. The aim of the work is the study of the stress distribution in the vicinity of a bi-material notch subjected to a combination of normal and shear modes of loading. Further, the assessment of crack initiation from the stress concentrator is shown.
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