Tensile properties of hyperelastic functionally graded polymer

Abstract

A biomaterial is a medical revolution that improves the quality of life. The Mechanical property of biomaterial is required to be similar to replaced human part, study show that the use of functionally graded polymer can improve the mechanical property of biomaterial. A functionally graded polymer known as Poly(octanediol-co-dodecanedioate-co-citrate-co-itaconate) (PODCI) is synthesized by versatile photo printing method. When a different ratio of citric acid and itaconic acid is used, PODC25I25 and PODC30I20 are synthesized. PODCI is a hyper elastic material in which the stress–strain curve is not linear. Hence, the stress–strain curve is defined by using NeoHookean, Mooney-Rivlin, Polynomial, Yeoh, and Ogden models. Finite element analysis was performed to identify the best model to describe the mechanical property of PODCI. Ogden Model was found to be the best model. Different combination of PODCI was then assigned to coupon parts, forming eight distinct configurations and finite element analysis was performed on the coupon. The result shows each configuration has a different directional advantage. It is found that Configuration 2 and 4 have the best longitudinal support while Configuration 5 has the best lateral support.