A bilinear structural constitutive model for strain rate-dependent behaviour of human diaphragm tissue

Abstract Cast iron alloys with low production cost and quite good mechanical properties are widely used in the automotive industry. To study the mechanical behavior of a typical ductile cast iron (GJS-450) with nodular graphite, uni-axial quasi-static and dynamic tensile tests at strain rates of 10− 4, 1, 10, 100, and 250 s− 1 were carried out. In order to investigate the effects of stress state, specimens with various geometries were used in the experiments. Stress–strain curves and fracture strains of the GJS-450 alloy in the strain-rate range of 10− 4 to 250 s− 1 were obtained. A strain rate-dependent plastic flow law based on the Voce model is proposed to describe the mechanical behavior in the corresponding strain-rate range. The deformation behavior at various strain rates is observed and analyzed through simulations with the proposed strain rate-dependent constitutive model. The available damage model from Bai and Wierzbicki is extended to take the strain rate into account and calibrated based on the analysis of local fracture strains. The validity of the proposed constitutive model including the damage model was verified by the corresponding experimental results. The results show that the strain rate has obviously nonlinear effects on the yield stress and fracture strain of GJS-450 alloys. The predictions with the proposed constitutive model and damage models at various strain rates agree well with the experimental results, which illustrates that the rate-dependent flow rule and damage models can be used to describe the mechanical behavior of cast iron alloys at elevated strain rates.

Download Full-text

Rate-dependent behavior and constitutive model of DP600 steel at strain rate from 10−4 to 103s−1

Materials & Design (1980-2015) ◽

10.1016/j.matdes.2008.10.001 ◽

2009 ◽

Vol 30 (7) ◽

pp. 2501-2505 ◽

Cited By ~ 47

Author(s):

Haidong Yu ◽

Yongjin Guo ◽

Xinmin Lai

Keyword(s):

Constitutive Model ◽

Strain Rate ◽

Rate Dependent ◽

Dependent Behavior

Download Full-text

A strain-rate dependent micromechanical constitutive model for glass/epoxy composites

Composite Structures ◽

10.1016/j.compstruct.2014.10.035 ◽

2015 ◽

Vol 121 ◽

pp. 37-45 ◽

Cited By ~ 18

Author(s):

Mahmood M. Shokrieh ◽

Reza Mosalmani ◽

Majid Jamal Omidi

Keyword(s):

Constitutive Model ◽

Strain Rate ◽

Epoxy Composites ◽

Rate Dependent

Download Full-text

A structural constitutive model for the strain rate-dependent behavior of anterior cruciate ligaments

International Journal of Solids and Structures ◽

10.1016/j.ijsolstr.2005.04.022 ◽

2006 ◽

Vol 43 (6) ◽

pp. 1561-1570 ◽

Cited By ~ 35

Author(s):

Raffaella De Vita ◽

William S. Slaughter

Keyword(s):

Constitutive Model ◽

Strain Rate ◽

Cruciate Ligaments ◽

Anterior Cruciate Ligaments ◽

Rate Dependent ◽

Dependent Behavior ◽

Anterior Cruciate

Download Full-text

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

Volume 3: Structures, Safety and Reliability ◽

10.1115/omae2015-42360 ◽

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.

Download Full-text