1992 年 58 巻 551 号 p. 1107-1114
This paper presents a method of finite element analysis for finite deformation of layered skin and under-skin tissues applicable to facial expression. The hyperelastic constitutive equation for skin and under-skin tissues are identified from experimental work in vitro by using strain-energy function. Green strain for finite deformation and the hyperelastic constitutive equation with incompresibility are linearlized in incremental form and the governing matrix equation are solved on each loading step. Some tensile tests on layered skin and under-skin tiessues with a hole, and indentation tests on similar specimens, have been carried out by two-axial tensile-test apparatus, within a vessel fulfilled by physiological salt water and compared with calculation results. It was shown that both results are well coincident with each other.