The Creep Properties and Numerical Simulation for PMMA Window

被引：0
|
作者：
Guo D. [1 ]
Huang X. [1 ]
Wang F. [2 ]
机构：
[1] School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai
[2] Shanghai Engineering Research Center of Hadal Science and Technology, Shanghai Ocean University, Shanghai
来源：
Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University | 2019年 / 53卷 / 05期
关键词：
Creep; Deep-sea manned submersible; Observation window; Polymethyl methacrylate (PMMA); Viscoelasticity;
D O I：
10.16183/j.cnki.jsjtu.2019.05.001
中图分类号：
学科分类号：
摘要：
The traditional linear elastic model demonstrates large limitation to simulate the creep deformation of the polymethyl methacrylate(PMMA) observation window on human occupied deep-sea vehicle. A linear viscoelastic constitutive model was built based on Prony series form. The mass scaling method together with the equivalent duration method was introduced to accelerate FEM analysis. The numerical-simulation results showed much stability and fitted well with test data. It was concluded that PMMA window showed viscoelastic behavior when loaded gradually to a high level at room temperature. So the viscoelasticity must be considered during a whole loading-holding process. Under quasi-static condition, traditional static FEM was replaced by dynamic explicit FEM which is adaptive to the time-varying property of PMMA viscoelasticity. It was also found that a fillet could help prevent local stress concentration and improve grid convergence. © 2019, Shanghai Jiao Tong University Press. All right reserved.
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页码：513 / 520
页数：7
相关论文
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