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Simplified Anisotropic Plasticity Model for Analyzing the Postyield Behavior of Cold-Formed Sheet-Metal Shear Panel Structures
| 题名： | Simplified Anisotropic Plasticity Model for Analyzing the Postyield Behavior of Cold-Formed Sheet-Metal Shear Panel Structures |
| 其他题名： | ABAQUS.(2010).Version 6.10 user's manual,Dassault Systemes,Providence,RI. |
| 正文语种： | 英文 |
| 作者： | Hongyu Zhou |
| 关键词： | Constitutive model;Plastic anisotropy;Sheet-metal structure;Analysis and computation |
| 摘要： | A simplified anisotropic constitutive model for orthotropic metal sheets is developed herein to analyze the off-axial stress-strain response of cold-formed metal sheets, where the material plastic anisotropy is induced by work hardening during the forming process. Hill's 1948 anisotropic yield criterion is used to determine the material initial yielding, and the strain hardening is modeled using a mixed kinematicisotropic hardening law along with constantly changing material principal directions as a result of the off-axial plastic loading. The isotropic hardening parameters were expressed using Fourier series and are functions of the loading directions. The expression of hardening parameters using Fourier series allows the model to be adaptively calibrated to the current state of stress using as few as three sets of off-axial stress-strain data. The proposed model is able to predict the direction-dependent strain hardening behavior of orthotropic metal sheets, as well as account for the progressive changing in material principal directions as a result of the off-axial plastic loading. The predicted results were validated using published experimental data of AA7018-T1 aluminum alloy. Finally, as an illustrative example, the anisotropic plasticity model was implemented, along with the simplified analytical approach, to analyze the push-over responses of a sheet-metal shear wall structure with a cold-rolled infill plate. The results predicted by the simplified model match closely with those of finite element analysis and indicate that the performance of the shear wall system depends on the installation direction of the infill metal sheet with respect to its rolling direction. |
| 出版年： | 2015 |
| 论文唯一标识： | P-26Y2015V141N07021 |
| 英文栏目名称： | Technical Papers |
| doi： | 10.1061/(ASCE)ST.1943-541X.0001152 |
| 期刊名称： | Journal of Structural Engineering |
| 拼音刊名(出版物代码)： | P-26 |
| 卷： | 141 |
| 期： | 07 |
| 页码： | 206-216 |
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