Stresses and Zero-Stress State in Vas
Zhang Peiyuan, Zhang Xiaomin, Yan Bo, Peng Xianghe
(Chongqing University, 400044)

Abstract: The purpose of this article is to perfect the depiction from the zero -stress state to the integrity-vas state. Based on the zero-stress state in carved vas segment, four parameters used to depict the zero-stress state and the geometric transformation from the carved vas segment to integrity-state are proposed. Adopting Mooney-Rivlin substance model, using the principle of finited eformation of elastic body, the quantitative relations between those introduced parameters and the pressure, the stress and the axial-stress in vas are obtained.
Keywords: zero-stress state, vas, stress, pressure.