Constitutive Modeling of Sea Ice

1987 ◽  
Vol 109 (2) ◽  
pp. 200-205
Author(s):  
V. Chen ◽  
E. S. Chen ◽  
V. Vivatrat
Keyword(s):  
Constitutive Modeling ◽  
High Strain ◽  
Constitutive Models ◽  
Strain Rates ◽  
Rate Dependency ◽  
High Strain Rates ◽  
Reliable Prediction ◽  
Softening Behavior ◽  
Analytical Work ◽  
Ice Loads

Realistic constitutive models for ice are necessary for reliable prediction of ice loads and ice-structure interaction. Previous analytical work has tended to concentrate on ice behavior at low strain rates. Under high strain rates, the post peak softening behavior becomes more important than rate-dependency. This paper proposes a new constitutive model for ice under high strain rates, incorporating strain softening and pressure sensitivity. In its present form, the model is incrementally linear and can be easily implemented in a finite element computer program to solve monotonic loading problems.

PRESSURE-SENSITIVITY AND CONSTITUTIVE MODELING OF AN ELASTOMER AT HIGH STRAIN RATES

2009 ◽  
Author(s):  
T. Jiao ◽  
R. J. Clifton ◽  
S. E. Grunschel ◽  
Mark Elert ◽  
Michael D. Furnish ◽  
...  
Keyword(s):  
Constitutive Modeling ◽  
High Strain ◽  
Strain Rates ◽  
Pressure Sensitivity ◽  
High Strain Rates

Evolution of Anand Parameters With Elevated Temperature Aging for SAC Leadfree Alloys

2020 ◽  
Author(s):  
Pradeep Lall ◽  
Vikas Yadav ◽  
Jeff Suhling ◽  
David Locker
Keyword(s):  
Experimental Data ◽  
High Strain ◽  
Constitutive Models ◽  
Tensile Tests ◽  
Model Parameters ◽  
Strain Rates ◽  
Automotive Electronics ◽  
High Strain Rates ◽  
Operating Temperatures ◽  
Electronic Assemblies

Abstract Electronic equipment in automotive, agricultural and avionics applications may be subjected to temperatures in the range of −55 to 200°C during storage, operation and handling in addition to high strain-rates. Strain rates in owing to vibration and shock may range from 1–100 per sec. Temperature in electronic assemblies depends typically on location, energy dissipation and thermal architecture. Some investigators have indicated that the required operating temperature is between −40 to 200°C for automotive electronics located underhood, on engine, on transmission. Prior data indicates the evolution of mechanical properties under extended exposures to high temperatures. However, the constitutive models are often only available for pristine materials only. In this paper, effect of low operating temperatures (−65°C to 0°C) on Anand-model parameters at high strain rates (10–75 per sec) for aged SAC (SAC105 and SAC-Q) solder alloys has been studied. Stress-Strain curves have been obtained at low operating temperatures using tensile tests. The SAC leadfree solder samples were subjected to isothermal-aged up to 4-months at 50°C before testing. Anand Viscoplastic model has been used to describe the material constitutive behavior. Evolution of Anand Model parameters for SAC solder has been investigated. The computed parameters of the experimental data were used to simulate the tensile test and verified the accuracy of the model. A good correlation was found between experimental data and Anand predicted data.

Influence of Temperature and Strain Rate on the Mechanical Behaviour of Aluminium Alloy AA6060

2014 ◽  
Vol 794-796 ◽  
pp. 520-525
Author(s):  
Vincent Vilamosa ◽  
Arild H. Clausen ◽  
Odd Sture Hopperstad ◽  
Tore Børvik ◽  
Svein Skjervold
Keyword(s):  
Strain Rate ◽  
High Speed ◽  
High Strain ◽  
True Strain ◽  
Constitutive Models ◽  
Local Deformation ◽  
Minor Effect ◽  
Strain Rates ◽  
High Strain Rates ◽  
A Minor

In an attempt to improve the constitutive models for 6xxx aluminium alloys at high temperatures and high strain rates, a comprehensive test series has been carried out for AA6060. Uniaxial tension tests were performed at various strain rates from 0.01 s-1to 1000 s-1and temperatures from 20 °C to 350 °C. The tests were carried out using a standard tensile machine for low to moderate strain rates and a split-Hopkinson tension bar (SHTB) system for high strain rates. In both cases, an induction apparatus was used to heat the sample while local deformation measurements were obtained with a high-speed camera and used to estimate the true strain beyond necking. Strong coupling between the influence of strain rate and temperature on the stress-strain behaviour was found. At room temperature, the strain rate has a minor effect on the behaviour of AA6060. On the other hand, a significant increase of the yield stress and work-hardening with strain-rate is observed for temperatures above (K), being the melting temperature; i.e., above 673 K.

scholarly journals On constitutive models of oxygen-free high-conductivity copper at high pressure and high strain rates

2009 ◽  
Vol 58 (4) ◽  
pp. 2612
Author(s):  
Chen Da-Nian ◽  
Fan Chun-Lei ◽  
Hu Jin-Wei ◽  
Tan Hua ◽  
Wang Huan-Ran ◽  
...  
Keyword(s):  
High Pressure ◽  
High Strain ◽  
Constitutive Models ◽  
High Conductivity ◽  
Strain Rates ◽  
High Strain Rates
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