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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Rashid, K. Abu Al-Rub George, Z. Voyiadjis Anthony, N. Palazotto |
| Copyright Year | 2005 |
| Abstract | During dynamic loading processes, large inelastic deformation associated with high strain rates leads, for a broad class of ductile metals, to degradation and failure by strain localization. However, as soon as material failure dominates a deformation process, the material increasingly displays strain softening and the finite element computations are considerably affected by the mesh size and alignment. This gives rise to a non-physical description of the localized regions. This paper presents theoretical and computational frameworks to solve this problem with the aid of nonlocal gradient-enhanced theory coupled to visco-inelasticity. Constitutive equations for anisotropic thermo-viscodamage (rate-dependent damage) mechanism coupled with thermo-hypoelasto-viscoplastic deformation are developed in this work within the framework of thermodynamic laws, nonlinear continuum mechanics, and nonlocal continua. Explicit and implicit micro-structural length scale measures, which preserve the well-posedness of the differential equations, are introduced through the use of the viscosity and gradient localization limiters. |
| Sponsorship | Applied Mechanics Division |
| Starting Page | 123 |
| Ending Page | 130 |
| Page Count | 8 |
| File Format | |
| ISBN | 0791842126 |
| DOI | 10.1115/IMECE2005-81342 |
| e-ISBN | 0791837696 |
| Volume Number | Applied Mechanics |
| Conference Proceedings | ASME 2005 International Mechanical Engineering Congress and Exposition |
| Language | English |
| Publisher Date | 2005-11-05 |
| Publisher Place | Orlando, Florida, USA |
| Access Restriction | Subscribed |
| Subject Keyword | Size effects Nonlocal theory Localization Material length scale Viscosity Deformation Anisotropy Computation Metals Differential equations Continuum mechanics Dynamic testing (materials) Finite element analysis Damage Failure Constitutive equations |
| Content Type | Text |
| Resource Type | Article |
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