dorsal/arxiv
View SchemaEvolution of Continuum from Elastic Deformation to Flow
| Authors | Jianhua Xiao |
|---|---|
| Categories | |
| ArXiv ID | physics/0511170 |
| URL | https://arxiv.org/abs/physics/0511170 |
Abstract
Traditionally, the deformation of continuum is divided into elastic, plastic, and flow. For a large deformation with cracking, they are combined together. So, for complicated deformation, a formulation to express the evolution of deformation from elastic to flow will help to understand the intrinsic relation among the related parameters which relate the deformation with a stress field. To this purpose, Eringen polar decomposition and Trusedell polar decomposition are formulated by explicit formulation of displacement field, based on Chen additive decomposition of deformation gradient. Then the strain introduced by the multiplicative decomposition and the strain introduced by the additive decomposition are formulated explicitly with displacement gradient. This formulation clears the intrinsic contents of strains defined by taking the Eringen polar decomposition and Trusedell polar decomposition. After that, it shows that the plastic deformation can be expressed as the irreversible local average rotation. For initial isotropic simple elastic material, the path-dependent feature of classical plasticity theory is naturally expressed in Chen strain definition. It is founded that for initially isotropic material the motion equations require a non-symmetric stress for dynamic deformation and a symmetric stress for static deformation. This controversy between dynamic deformation and static deformation can be used to explain the cracking or buckling of solid continuum. Finally, the research shows that the flow motion of continuum can be expressed by the same formulation system. So, it forms an evolution theory from elastic deformation to flow of continuum.
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"abstract": "Traditionally, the deformation of continuum is divided into elastic, plastic,\nand flow. For a large deformation with cracking, they are combined together.\nSo, for complicated deformation, a formulation to express the evolution of\ndeformation from elastic to flow will help to understand the intrinsic relation\namong the related parameters which relate the deformation with a stress field.\nTo this purpose, Eringen polar decomposition and Trusedell polar decomposition\nare formulated by explicit formulation of displacement field, based on Chen\nadditive decomposition of deformation gradient. Then the strain introduced by\nthe multiplicative decomposition and the strain introduced by the additive\ndecomposition are formulated explicitly with displacement gradient. This\nformulation clears the intrinsic contents of strains defined by taking the\nEringen polar decomposition and Trusedell polar decomposition. After that, it\nshows that the plastic deformation can be expressed as the irreversible local\naverage rotation. For initial isotropic simple elastic material, the\npath-dependent feature of classical plasticity theory is naturally expressed in\nChen strain definition. It is founded that for initially isotropic material the\nmotion equations require a non-symmetric stress for dynamic deformation and a\nsymmetric stress for static deformation. This controversy between dynamic\ndeformation and static deformation can be used to explain the cracking or\nbuckling of solid continuum. Finally, the research shows that the flow motion\nof continuum can be expressed by the same formulation system. So, it forms an\nevolution theory from elastic deformation to flow of continuum.",
"arxiv_id": "physics/0511170",
"authors": [
"Jianhua Xiao"
],
"categories": [
"physics.class-ph"
],
"title": "Evolution of Continuum from Elastic Deformation to Flow",
"url": "https://arxiv.org/abs/physics/0511170"
},
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