TY - JOUR
T1 - A modelling and simulation on failure prediction of ductile polymer based on craze evolution and annihilation
AU - Kobayashi, Seiichi
AU - Tomii, Daisuke
AU - Shizawa, Kazuyuki
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2004/6
Y1 - 2004/6
N2 - Ductile fracture of a polymer plate due to craze growth is characterized by a failure in the front of propagating neck. In this paper, the elastoviscoplastic constitutive equation, that explicitly represents the effect of craze, is rigorously derived. Through a thermodynamic discussion about arguments of craze rate function, a new craze evolution equation is proposed so as to express the craze concentration on the boundary between the oriented molecular region and the glassy one, and the craze annihilation in the oriented region, with a hydrostatic stress criterion of craze generation. Additionally, an evolution law of mean plastic strain affecting the craze growth is numerically identified for a polymer block with some circular holes. A finite element simulation is carried out in order to verify this model. The craze propagation and annihilation are visualized, and the possibility of failure prediction based on this model is also discussed.
AB - Ductile fracture of a polymer plate due to craze growth is characterized by a failure in the front of propagating neck. In this paper, the elastoviscoplastic constitutive equation, that explicitly represents the effect of craze, is rigorously derived. Through a thermodynamic discussion about arguments of craze rate function, a new craze evolution equation is proposed so as to express the craze concentration on the boundary between the oriented molecular region and the glassy one, and the craze annihilation in the oriented region, with a hydrostatic stress criterion of craze generation. Additionally, an evolution law of mean plastic strain affecting the craze growth is numerically identified for a polymer block with some circular holes. A finite element simulation is carried out in order to verify this model. The craze propagation and annihilation are visualized, and the possibility of failure prediction based on this model is also discussed.
KW - Constitutive Equation
KW - Craze
KW - Damage Mechanics
KW - Ductile Polymer
KW - Evolution Equation
KW - Finite Deformation Theory
KW - Finite Element Method
KW - Plasticity
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U2 - 10.1299/kikaia.70.810
DO - 10.1299/kikaia.70.810
M3 - Review article
AN - SCOPUS:4344624898
VL - 70
SP - 810
EP - 817
JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
JF - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
SN - 0387-5008
IS - 6
ER -