Computation of mode I strain energy release rate of symmetrical and asymmetrical sandwich structures using mixed finite element

Abstract

The use of composite materials is on the rise in different engineering fields, the main advantage of these materials for the aerospace industry is their low weight for excellent mechanical qualities. The analysis of failure modes, such as delamination, of these materials has received great attention from researchers. This paper proposes a method to evaluate the mode I Strain Energy Release Rate (SERR) of sandwich structures. This method associated a two-dimensional mixed finite element with virtual crack extension technique for the analysis of interfacial delamination of sandwich beams. A symmetrical Double Cantilever Beam (DCB) and asymmetrical Double Cantilever Beam (UDCB) have been analyzed in this study. The comparison of the results obtained by this method and those found in the literature shows efficiency and good precision for the calculation of Strain Energy Release Rate (SERR).

Mixed Finite Element Computation of Energy Release Rate in Anisotropic Materials Based on Virtual Crack Closure-Integral Method

“…The method gave great precision on the paperwork of Bouziane et al [36], where a numerical example of a center cracked plan with uniaxial tension was investigated in two cases of homogenous materials and bi-materials. Also the study of Mohamed Ben Ali et al [37] on sandwich structures with two cases of symmetrical double cantilever beam and asymmetrical double cantilever beam. For the work of Benmalek et al [38], the exactitude of the results was highly remarkable.…”