The strain rate and temperature dependence of the dynamic impact response of tungsten composite

1998 ◽  
Vol 257 (2) ◽  
pp. 256-267 ◽  
Author(s):  
Woei-Shyan Lee ◽  
Guo-Liang Xiea ◽  
Chi-Feng Lin
Keyword(s):  
Strain Rate ◽  
Temperature Dependence ◽  
Impact Response ◽  
Dynamic Impact

THE DYNAMIC IMPACT RESPONSE OF PP∕PA BLENDS UNDER MULTI-AXIAL COMPRESSIVE STRESS STATE

2008 ◽  
Author(s):  
Shi Shaoqiu ◽  
Yu Bing ◽  
Yan Linbao ◽  
Alberto D’Amore ◽  
Domenico Acierno ◽  
...  
Keyword(s):  
Stress State ◽  
Compressive Stress ◽  
Impact Response ◽  
Dynamic Impact ◽  
Axial Compressive Stress

Anthropometric Modelling of the Pregnant Occupant

Volume 2 ◽  
2004 ◽  
Author(s):  
B. Serpil Acar ◽  
Alix M. Weekes ◽  
David van Lopik
Keyword(s):  
Pregnant Woman ◽  
Pregnant Women ◽  
Injury Risk ◽  
Impact Response ◽  
Entire Body ◽  
Initial Model ◽  
Dynamic Impact ◽  
Automobile Crashes ◽  
Crash Protection ◽  
Safety Systems

A parametric anthropometric model of a pregnant woman has been produced for use in crash protection research. The model is based on anthropometric measurements of pregnant women, with the initial model representing a 5th percentile woman in her 30th week of gestation. The model has been developed to be easily scaleable so women of different sizes can be modeled and adapted to simulate any stage of pregnancy. Previous research has simply added an enlarged abdomen to existing females models. However the model presented describes a comprehensive depiction of the altered pregnant form by incoporating the anthropometry of the entire body. This paper presents the pregnant occupant model for use in evaluation of safety systems and vehicle interiors. This work is the first step toward a computational pregnant occupant for crash protection research, capable of simulating dynamic impact response and predicting injury risk in automobile crashes.

Strain Rate Dependence of the Flow Stress and Work-Hardening of Single Crystals of NI3(Al,Hf)B

1994 ◽  
Vol 364 ◽  
Author(s):  
S. S. Ezz ◽  
Y. Q. Sun ◽  
P. B. Hirsch
Keyword(s):  
Flow Stress ◽  
Strain Rate ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Yield Stress ◽  
Strain Rate Sensitivity ◽  
Work Hardening ◽  
Room Temperature ◽  
Rate Sensitivity ◽  
Controlling Mechanism

AbstractThe strain rate sensitivity ß of the flow stress τ is associated with workhardening and β=(δτ/δln ε) is proportional to the workhardening increment τh = τ - τy, where τy is the strain rate independent yield stress. The temperature dependence of β/τh reflects changes in the rate controlling mechanism. At intermediate and high temperatures, the hardening correlates with the density of [101] dislocations on (010). The nature of the local obstacles at room temperature is not established.

Time and Temperature Dependence of the Ultimate Properties of an SBR Rubber at Constant Elongations

1961 ◽  
Vol 34 (3) ◽  
pp. 897-909
Author(s):  
Thor L. Smith ◽  
Paul J. Stedry
Keyword(s):  
Tensile Strength ◽  
Strain Rate ◽  
Temperature Dependence ◽  
Rate Dependence ◽  
Strain Rates ◽  
Type Specimens ◽  
Stress Strain ◽  
Ultimate Elongation ◽  
Tensile Tester ◽  
Ultimate Properties

Abstract A study was made previously of the temperature and strain rate dependence of the stress at break (tensile strength) and the ultimate elongation of an unfilled SBR rubber. In that study, stress-strain curves to the point of rupture were measured with an Instron tensile tester on ring type specimens at 14 temperatures between −67.8° and 93.3° C, and at 11 strain rates between 0.158×10−3 and 0.158 sec−1 at most temperatures. The tensile strength was found to increase with both increasing strain rate and decreasing temperature. At all temperatures above −34.4° C, the ultimate elongation was likewise found to increase with increasing strain rate and decreasing temperature but at lower temperatures the opposite dependence on rate was observed; at −34.4° C, the ultimate elongation passed through a maximum with increasing rate.

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