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.

引用

页码：513 / 520

页数：7

共 12 条

[11] Guo C., Tao Z., Zhang P., ABAQUS explicit algorithm acceleration method quasi-static analysis, Low Temperature Architecture Technology, 37, 8, pp. 73-75, (2015)
[12] Luo W., Wang C., Zhao R., Application of time-temperature-stress superposition principle to nonlinear creep of poly(methyl methacrylate), Key Engineering Materials, 340-341, pp. 1091-1096, (2007)

← 1 2 →