Investigation of Sample Geometry and Strain-Rate Dependence in Shear Characterization of a UHMWPE Unidirectional Cross-ply for Finite Element Simulation of Composite Processing

2019 ◽  
Author(s):  
KARI WHITE ◽  
JAMES SHERWOOD
Keyword(s):  
Finite Element ◽  
Strain Rate ◽  
Finite Element Simulation ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Composite Processing ◽  
Sample Geometry ◽  
Element Simulation

Simulation of hot high-speed yielding of intermetallic titanium alloy VTI-4 under conditions of high-speed loading

2020 ◽  
Vol 0 (12) ◽  
pp. 10-16
Author(s):  
V.V. Avtaev ◽  
◽  
D. V. Grinevich ◽  
A. V. Zavodov
Keyword(s):  
Finite Element ◽  
Titanium Alloy ◽  
Strain Rate ◽  
Finite Element Simulation ◽  
Modulus Of Elasticity ◽  
High Speed ◽  
Residual Deformation ◽  
Test Results ◽  
Element Simulation ◽  
The Relationship

Yielding tests of VTI-4 alloy specimens have been carried out at temperature 1010 °C under conditions of high-speed loading. Based on the test results the modulus of elasticity as well as axial and radial residual deformation values in the end and central zones for each loading stage were determined. Fitting criteria for finite element simulation and the experiment are proposed with tracing VTI-4 alloy diagram deformation at temperature 1010 °C and strain rate of 2.5 sec–1. As a result of finite element simulation the relationship between the material structures obtained during high-speed yielding and the deflected modes in different zones was determined.

Analysis of Neck Propagation in Polymeric Fibres Including the Effects of Viscoplasticity

1988 ◽  
Vol 110 (4) ◽  
pp. 395-400 ◽  
Author(s):  
P. Tug¯cu ◽  
K. W. Neale
Keyword(s):  
Finite Element ◽  
Constitutive Model ◽  
Strain Rate ◽  
Rate Dependence ◽  
Strain Rate Dependence ◽  
Stress Strain ◽  
Finite Element Scheme ◽  
Element Scheme ◽  
Neck Propagation ◽  
Stretching Process

The effects of material strain-rate dependence on necking and neck propagation in polymeric fibres are analyzed. Using a finite element scheme together with an elastic-viscoplastic constitutive model the entire load-deformation histories of round specimens are computed. Stress-strain distributions as well as the evolution of the specimen profiles are given at various stages of the axisymmetric stretching process. Comparisons with rate-independent response are also presented.

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