Strain rate dependent damage evolution in long glass fiber reinforced polypropylene

2020 ◽  
Vol 189 ◽  
pp. 108007
Author(s):  
J. Lienhard ◽  
D. Discher ◽  
J. Hohe
Keyword(s):  
Strain Rate ◽  
Glass Fiber ◽  
Damage Evolution ◽  
Fiber Reinforced ◽  
Rate Dependent ◽  
Glass Fiber Reinforced ◽  
Long Glass Fiber

Numerical Prediction Method for Elasto-Viscoplastic Behavior of Glass Fiber Reinforced Polyurethane Foam Under Various Compressive Loads and Cryogenic Temperatures

2015 ◽  
Author(s):  
Chi-Seung Lee ◽  
Myung-Sung Kim ◽  
Kwang-Ho Choi ◽  
Myung-Hyun Kim ◽  
Jae-Myung Lee
Keyword(s):  
Constitutive Model ◽  
Strain Rate ◽  
Glass Fiber ◽  
Polyurethane Foam ◽  
Prediction Method ◽  
Nonlinear Behavior ◽  
Cryogenic Temperatures ◽  
Fiber Reinforced ◽  
Rate Dependent ◽  
Glass Fiber Reinforced

In the present study, the material characteristics of a glass fiber-reinforced polyurethane foam (RPUF) which is widely adopted to a liquefied natural gas (LNG) insulation system was investigated by a series of compressive tests under room and cryogenic temperatures. In addition, a temperature- and strain rate-dependent constitutive model was proposed to describe the material nonlinear behavior such as increase of yield stress and plateau according to temperature and strain rate variations. The elasto-viscoplastic model was transformed to an implicit form, and was implemented into the ABAQUS user-defined subroutine, namely, UMAT. Through a number of simulation using the developed subroutine, the various stress-strain relationships of RPUF were numerically predicted, and the material parameters associated with the constitutive model were identified. In order to validate the proposed method, the computational results were compared to a series of test of RPUF.

A temperature- and strain-rate-dependent isotropic elasto-viscoplastic model for glass-fiber-reinforced polyurethane foam

2015 ◽  
Vol 84 ◽  
pp. 163-172 ◽  
Author(s):  
Chi-Seung Lee ◽  
Myung-Sung Kim ◽  
Seong-Bo Park ◽  
Jeong-Hyeon Kim ◽  
Chang-Seon Bang ◽  
...  
Keyword(s):  
Strain Rate ◽  
Glass Fiber ◽  
Polyurethane Foam ◽  
Fiber Reinforced ◽  
Viscoplastic Model ◽  
Rate Dependent ◽  
Glass Fiber Reinforced
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