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A FEM coupling model for properties prediction during the curing of an epoxy adhesive for a novel assembly of radio telescope panel
Shouwei Hu; Yi Chen
2014-07-18
会议录名称Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
卷号9151
页码Vol. 915132-1-14
会议日期2014-6-22
会议地点Montréal, Quebec, Canada
会议主办者SPIE
出版者SPIE
摘要
The curing of epoxy adhesives is a complex phenomenon where the thermal, the chemistry and the mechanics are coupled. Corresponding material properties such as mechanical and physics properties are evolving with the curing. This paper focuses on their predictions by a multiphisics FEM approach of the thermal, chemical and mechanical couplings involved by the curing for a novel assembly of radio telescope panel. The first part presents the constitutive model of an epoxy adhesive that is considered for the curing. The numerical solving, performed with a specific user subroutine of Ansys, is detailed and allows the study of real three-dimensional structure parts. Residual stresses and strains of different metallic membranes and internal adhesives in the interconnect during the assembly of radio telescope panel are
investigated. The mechanical response of the interconnect is analyzed with respect to the poisson’s ratio, relaxation time and adhesive thickness. It is shown that, although the overall residual stresses at the interconnect increase with the adhesive curing, the local strains have different evolving trends, indicating the possibility of damage and decohesion that might compromise mechanical integrity and interrupt the component processing precision.
关键词Material Modeling Multiphysics Fem Epoxy Adhesive Cure Shrinkage Viscoelastic Effect Residual Stresses
学科领域射电望远镜
文献类型会议论文
条目标识符http://ir.niaot.ac.cn/handle/114a32/790
专题会议论文
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Shouwei Hu,Yi Chen. A FEM coupling model for properties prediction during the curing of an epoxy adhesive for a novel assembly of radio telescope panel[C]:SPIE,2014:Vol. 915132-1-14.
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