Effect of hole number to bearing strength in pin loaded composite plates

The aim of this study is to research failure mode, failure load and bearing strength in alaminated glass-vinylester composite plate with two parallel circular holes, which aresubjected to traction forces by two parallel rigid pins. The behaviour of pin loadedcomposite plates has been observed experimentally and numerically with differentdimensions.These are performed at three different modes; the distance from the free edge of theplate to diameter of holes (E/D) ratio (1,2,3,4,5), the distance between upper part of plateand centre of holes to diameter of holes K/D ratio (2,3,4) and the distance between twoholes to diameter of holes M/D ratio (2,3,4,5). The failure analysis is performednumerically and experimentally and the orientation of fiber ? =0° is constant during study.Failure types and failure loads on the specimens have been determined fromexperimental study. In numerical study, three dimensional finite element method was usedby assistance of LUSAS 13.6 finite element analysis program. In this program, maximumfailure load is found with nonlinear analysis. Hashin failure criteria is used in this failureanalysis. In the case of failure, appropriate properties of the nodes failed of the compositeplate are reduced.The experimental results are compared with the numerical results and it has been seenthat a good agreement between experimental and numerical results.