Development of Mathematical Models for Determination of Failure Loads of Glass Epoxy Composite Plates

This paper deals with the mathematical study of failure loads of glass epoxy composite plates with two serial holes subjected to traction force by two serial rigid pins. To evaluate the effect of joint geometry on the failure loads the geometrical parameters such as the edge distance of first hole-to-hole diameter (E/D), the width of the specimen-to-hole diameter (W/D), and the distance between center of two holes-to-hole diameter (K/D) were varied from 1-4, 2-4, and 3-4 respectively. Mathematical models have been developed for both wet and dry specimens to determine the failure loads of different geometry plates. Wet specimens are specimens immersed in seawater for 24 hours. The unimmersed specimens are called dry specimens. Here Full Cubic models have proved to be very efficient. A comparison of the results from mathematical models with the experimental results from existing literature shows high values of correlation co-efficient, Root Mean Square Error and Maximum Absolute Error. For estimation of the failure loads within the range of E/D, W/D and K/D considered for the study, the mathematical models developed are found to be efficient.