首 页机构概况机构设置科研人才队伍合作交流研究生教育博士后图书馆创新文化党群园地院重点实验室彭桓武中心信息公开
  学术活动
  您现在的位置:首页 > 学术活动 > 专题学术报告/Seminar
(Seminar) Mullins effect induced by chain de-lamination
2020-09-11  【 】【打印】【关闭

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

Chinese Academy of Sciences

Seminar

Title

题目

Mullins effect induced by chain de-lamination

Speaker

报告人

钱道远

Affiliation

所在单位

英国剑桥大学

Date

日期

2020年9月11日(周五)16:00--17:00

Venue

地点

南楼6420

Contact Person

所内联系人

孟凡龙

Abstract

摘要

we propose a new model to incorporate chain de-lamination and re-attachment processes in stretching filled rubber elastomers, which is then adapted to explain Mullins effect with partial recovery. The Mullins effect refers to the softening observed in pre-stretched filled rubber elastomers up to the maximum strain ever attained in the material’s history. In our model, Mullins softening is accounted for by allowing polymer chains to elongate upon stretching, and contract during relaxation, so the recovery effect is naturally included. At the heart of the model we promote the chain lengths, normally assumed to be constant, to variables that change with loading cycles. By fitting eight material parameters, namely the rubber and entanglement moduli, minimum chain length, de-lamination and re-attachment rate, two Log-Normal distribution parameters and an entanglement damage factor, we are able to achieve good agreement between numerical calculation results and experimental data at large stretches. It should be noted that this formalism is by no means restricted to explain Mullins effect and can be easily incorporated into more complex material models through, for example, network decomposition.
IE6.0浏览器,1024X768分辨率 版权所有 © 中国科学院理论物理研究所
地址:北京市海淀区中关村东路55号 邮政编码:100190
京ICP备05002865号】 京公网安备1101080094号