| 残余应力对复合材料弹2塑性变形的影响 |
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| 引用本文： | 胡更开,黄国良. 残余应力对复合材料弹2塑性变形的影响[J]. 复合材料学报, 2000, 17(2): 60-65 |
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| 作者姓名： | 胡更开 黄国良 |
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| 作者单位： | 北京理工大学应用力学系, 北京 100081 |
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| 基金项目： | 国家自然科学基金!资助项目 (No.1980 2 0 0 3) |
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| 摘 要： | 从细观力学的角度给出了分析残余应力对一般复合材料塑性性能影响的一种解析方法, 该方法基于应力二阶矩的割线模量法及Ponte Castaneda 和W illis 给出的弹性细观模型。有残余应力时, 所提的细观解析模型能够同时考虑纤维形状, 体积百分比, 纤维取向及纤维的分布对复合材料变形的影响。计算结果表明, 残余应力的存在会引起复合材料拉压变形的不对称, 材料宏观的拉压硬化曲线又与复合材料的细观结构参数密切相关。对单向复合材料, 本文作者对其等效割线热膨胀系数, 拉压应力-应变曲线的有限元分析结果与给出的细观解析模型定量吻合。
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| 关 键 词： | 残余应力 复合材料 细观力学 弹塑性 |
| 文章编号： | ： |
| 收稿时间： | 1998-09-02 |
| 修稿时间： | 1998-11-16 |
INFLUENCE OF RESIDUAL STRESS ON ELASTIC-PLASTIC DEFORMATION OF COMPOSITE MATERIALS |
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| HU Geng-kai,HUANG Guo-liang. INFLUENCE OF RESIDUAL STRESS ON ELASTIC-PLASTIC DEFORMATION OF COMPOSITE MATERIALS[J]. Acta Materiae Compositae Sinica, 2000, 17(2): 60-65 |
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| Authors: | HU Geng-kai HUANG Guo-liang |
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| Affiliation: | Department of Applied Mechanics, Beijing Institute of Technology, Beijing 100081 |
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| Abstract: | A micro mechanical method is proposed to account for the influence of thermal residual stress on elastic plastic deformation of composites. The method is based on the secant moduli method with second order stress moment and the elastic micro mechanical method proposed by Ponte Castaneda and Willis. This model can account for the influence of volume fraction, shape, orientation, and distribution of inclusions on macroscopic properties of composites with or without thermal stress. Finite element calculations are also carried out for unidirectional composites and compared with the proposed model. |
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| Keywords: | residual stress composite materials micro mechanics elasto plasticity |
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