The Experts below are selected from a list of 252 Experts worldwide ranked by ideXlab platform
T.w. Wright - One of the best experts on this subject based on the ideXlab platform.
-
on the speed of an unconstrained shear band in a Perfectly Plastic Material
International Journal of Solids and Structures, 2003Co-Authors: T.w. WrightAbstract:It is shown that the speed of an adiabatic shear band may be estimated from its physical and constitutive properties within a constant, which must be obtained from the complete boundary value problem.
-
A scaling law for the effect of inertia on the formation of adiabatic shear bands
International Journal of Plasticity, 1996Co-Authors: T.w. Wright, H. OckendonAbstract:For a rigid/Perfectly Plastic Material with linear thermal softening and power law rate hardening there is a competition between heat conduction and inertia in determining the time of shear band formation. In a finite specimen the nominal strain rate that produces the fastest growth of perturbations corresponds to the minimum critical strain. Similarly for a fixed strain rate in an infinite specimen, there is a finite wavelength with the maximum growth rate. It is argued that this wavelength should correspond to the most probable minimum spacing for shear bands.
H. Ockendon - One of the best experts on this subject based on the ideXlab platform.
-
A scaling law for the effect of inertia on the formation of adiabatic shear bands
International Journal of Plasticity, 1996Co-Authors: T.w. Wright, H. OckendonAbstract:For a rigid/Perfectly Plastic Material with linear thermal softening and power law rate hardening there is a competition between heat conduction and inertia in determining the time of shear band formation. In a finite specimen the nominal strain rate that produces the fastest growth of perturbations corresponds to the minimum critical strain. Similarly for a fixed strain rate in an infinite specimen, there is a finite wavelength with the maximum growth rate. It is argued that this wavelength should correspond to the most probable minimum spacing for shear bands.
Keh-chih Hwang - One of the best experts on this subject based on the ideXlab platform.
-
Unsteady growth of mode III crack in elastic Perfectly-Plastic Material
Engineering Fracture Mechanics, 2003Co-Authors: Keh-chih HwangAbstract:Abstract In this paper the assembly of the near-tip fields given by J. R. Rice is completed for the mode III crack growing quasi-statically and unsteadily in elastic Perfectly-Plastic Material. The obtained results provide a particular example for the general theoretical relations between the steady state and unsteady state crack growth. Further, the general expression of the rate of crack opening displacement is obtained, which is similar to one by J.R. Rice and co-workers for mode I crack growing in elastic Perfectly-Plastic Material. The fracture criterion of the critical opening displacement at a prescribed distance behind the crack tip is discussed. As a result, the theoretical J- resistance curves are given.
-
Dynamic asymptotic fields near a crack tip growing in a power-law hardening compressible Material
Mechanics of Materials, 1996Co-Authors: Keh-chih HwangAbstract:Abstract Dynamic asymptotic stress and strain fields near a mode I crack tip growing in a power-law hardening compressible Material are studied under plane strain conditions. By use of the J 2 flow theory and the rectangular components of field quantities, this paper obtains, through rigorous mathematical analysis, the asymptotic fields in which the stress- and strain-singularity are different, the angular variations of the fields are identical with those corresponding to dynamic crack in an elastic-Perfectly Plastic Material. Finally, the results as the compressible Material goes to be incompressible are discussed, and the numerical angular distributions of stress components are given.
Y.h. Lin - One of the best experts on this subject based on the ideXlab platform.
-
influence of strain hardening on continuous plate roll bending process
International Journal of Non-linear Mechanics, 2000Co-Authors: Y.h. Lin, Meng HuaAbstract:Abstract Influence of Material strain hardening on the mechanics of steady continuous roll- and edge-bending mode in the four-roll plate bending process was investigated. An analytical method to solve the governing differential equations for large deflection of elastoPlastic thin plate with any general strain hardening law of Material was developed. Numerical results for the physical quantities of (i) the shift of plate contact angle with rolls, (ii) the forces applied on rolls and (iii) the position setup of side roll, etc. were obtained and shown graphically as a function of the desired finish curvature of plate made of linear strain hardening Material. Comparison of the results with Perfectly Plastic Material is also made.
-
Effect of strain hardening on the continuous four-roll plate edge bending process
Journal of Materials Processing Technology, 1999Co-Authors: Meng Hua, Y.h. LinAbstract:Abstract An analytical approach has been developed to study the mechanics of the continuous plate edge bending mode of the four-roll bending process, solving the governing differential equation for the large deflection of an elastoPlastic thin plate with an arbitrary strain-hardening law for the Material. Numerical results for the physical quantities of: (i) the shift of the plate contact angle with rolls; (ii) the forces applied on the rolls; and (iii) the positional set-up of the side roll; are obtained and shown graphically as a function of the anticipated curvature of plate made of linear strain hardening Material. The effect of Material strain hardening on the mechanics is studied and compared with those for a Perfectly Plastic Material.
Meng Hua - One of the best experts on this subject based on the ideXlab platform.
-
influence of strain hardening on continuous plate roll bending process
International Journal of Non-linear Mechanics, 2000Co-Authors: Y.h. Lin, Meng HuaAbstract:Abstract Influence of Material strain hardening on the mechanics of steady continuous roll- and edge-bending mode in the four-roll plate bending process was investigated. An analytical method to solve the governing differential equations for large deflection of elastoPlastic thin plate with any general strain hardening law of Material was developed. Numerical results for the physical quantities of (i) the shift of plate contact angle with rolls, (ii) the forces applied on rolls and (iii) the position setup of side roll, etc. were obtained and shown graphically as a function of the desired finish curvature of plate made of linear strain hardening Material. Comparison of the results with Perfectly Plastic Material is also made.
-
Effect of strain hardening on the continuous four-roll plate edge bending process
Journal of Materials Processing Technology, 1999Co-Authors: Meng Hua, Y.h. LinAbstract:Abstract An analytical approach has been developed to study the mechanics of the continuous plate edge bending mode of the four-roll bending process, solving the governing differential equation for the large deflection of an elastoPlastic thin plate with an arbitrary strain-hardening law for the Material. Numerical results for the physical quantities of: (i) the shift of the plate contact angle with rolls; (ii) the forces applied on the rolls; and (iii) the positional set-up of the side roll; are obtained and shown graphically as a function of the anticipated curvature of plate made of linear strain hardening Material. The effect of Material strain hardening on the mechanics is studied and compared with those for a Perfectly Plastic Material.