STRESS AND FAILURE ANALYSIS OF COMPOSITE PLATES WITH CIRCULAR HOLE SUBJECTED TO SHEAR LOADING. PART 1: ANALYTICAL AND FINITE ELEMENT FORMULATION
Abdelhak Khechai, Abdelouahab Tati, Mohamed-Ouejdi Belarbi, Fares Mohammed Laid Rekbi
Quarterly No. 4, 2022 pages 205-210
DOI:
keywords: anisotropic plates, stress concentration, circular cutout, failure criterion, shear loading
abstract This current paper, which is the first part of two parts of a complete article, presents the theoretical and finite element formulation developed and proposed by the authors to obtain the stress concentration factors (SCFs) and the first ply failure (FPF) loads of composite laminated plates. The numerical studies are performed using a quadrilateral finite element of four nodes with thirty-two degrees of freedom. The present finite element was previously developed by the authors to study the bending and buckling of composite plates. The present finite element is a combination of two finite elements. The first one is a linear isoparametric membrane element, and the second one is a high-precision rectangular Hermitian element. In the second part of the paper, several examples will be considered to demonstrate and affirm the accuracy and the performance of the present element, as well as highlight the effect of some parameters on the stress distribution. The FPF strengths and their locations in laminated plates with and without holes are calculated by adapting the Hashin-Rotem, Tsai-Hill, and Tsai-Wu failure theories.