题 目：Imperfection sensitivity of pressured biopolymer spherical shells
报告人：茹重庆教授（ University of Alberta）
时 间：2017年4月20日（周四）13:30
地 点：延长校区应用数学和力学所东会议室
摘 要： Imperfection sensitivity is essential for various mechanical behavior of biopolymer shells of high geometric heterogeneity and thickness non-uniformity. In this presentation, a simpler refined shell
model recently developed for biopolymer spherical shells is used to study imperfection sensitivity of pressured biopolymer spherical shells. Simpler axisymmetric deformation is examined first, and followed
by a study of non-axisymmetric deformation with two-mode interaction. The present formulation and method are validated by comparing our results to established known results for the special case of classical
elastic spherical shells. One of our major conclusions is that most typical biopolymer spherical shells (such s some ultrasound contrast agents and spherical virus shells) are only moderately sensitive to geometric
imperfections due to their relatively small radius-to-thickness ratios as compared to classical elastic thin shells characterized by much larger radius-to-thickness ratios, although fewer biopolymer spherical shells
of relatively larger radius-to-thickness ratios can be very sensitive to geometric imperfection.
