Experimental Analysis and FEA Validation of Woven Composite Pin Joints

Abstract

The investigation is focus on developing a reliable computation procedure to analyses initial failure load for pin-loaded holes at layered composite structures. Finite element method (FEM) is used to determine deflection and stress distribution around the fastener hole. Hashing Failure Criterion is used to determine composite plate failure. Special attention in this work is paid to geometrical dimension variations and its effect on first failure loadof the composite plate. The main objective was to investigate the possibility of predicting the properties of the joint from the experimental tests, and validate the FEA model, the validated model further used for to study pin diameter variations properties of the joints. For material properties the standers test ware carried out on Universal Testing Machine to obtain its tensile yield load, and this obtained stress strain curve is utilized in FEA model, for material nonlinearity, remaining material properties are taken from the manufacturer of the plate. A refined finite element model was developed in which the nonlinearities due to contact between the pin and the hole were taken into account, and material nonlinearity also taken in to consideration for the analysis Particular attention was paid to account for the influence of the clearance between plate and pin ware investigated by numerically. In finite element pin/plate model is analyzed. The influence of coefficient of friction assembly containing pin-loaded hole is also investigated. The fixtures and the test specimens are prepared for the testing and its testing ware carried out on the Universal testing machine around 16 different geometrical variations. different geometrical variance samples are tested under the tensile test for prediction of the first failure load with [45]3S and [0] 3S two types stacking sequence, Specifically, the effect of orientation of the ply angel ware simulated in FEA, with validated FEA model and for first failure load verses angel of ply rotations effects ware studied, which has shown significant similarity to a basic load verses ply angel curve, In further simulations the effect of the increase in the diameter of the pin on failure load ware concluded. In conclusion, good agreement between experimental results and numerical predictions has been obtained from Finite Element Analysis, which is validated by the testing results the computation results are compared with obtained experimental results.