中间主应力对金属悬臂梁承载力的影响

马宗源; 廖红建; 党发宁

doi:10.6052/j.issn.1000-4750.2011.07.0438

中间主应力对金属悬臂梁承载力的影响

(1. 西安理工大学土木建筑工程学院，陕西，西安 710048；2. 西安交通大学土木工程系，陕西，西安 710049)

基金项目: 国家自然科学基金项目(50979087)

详细信息

通讯作者:
马宗源

中图分类号: O344.5
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- 刊出日期: 2013-01-24

INFLUENCE OF INTERMEDIATE PRINCIPAL STRESS ON BEARING CAPACITY OF METALLIC CANTILEVER BEAMS

(1. School of Civil Engineering and Architecture, Xi’an University of Technology, Xi’an, Shaanxi 710048, China; 2. Department of Civil Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China)

摘要

摘要: 基于双剪统一强度理论使用显式有限差分方法对矩形截面金属悬臂梁承载力的中间主应力影响进行了计算分析。通过分析发现，极限状态下悬臂梁的塑性应变的分布非规则圆扇形，而是接近对称三角形分布。中间主应力对悬臂梁承载能力的影响与梁的厚度有关。平面应力情况的悬臂梁比平面应变的中间主应力影响要低，平面应变情况下中间主应力对金属悬臂梁极限承载力的影响与梁的长度无关，平面应力情况下中间主应力影响随梁长度的增加呈先增大后减小而后趋于恒定的趋势。
- 金属悬臂梁 /
- 承载力 /
- 双剪统一强度理论 /
- 中间主应力 /
- 拉格朗日有限差分
Abstract: The influence of the intermediate principal stress on the bearing capacity for a rectangular and metallic cantilever beam was analyzed using the explicit finite difference method and twin shear unified strength theory. The distribution of plastic strain for a cantilever beam under the limit load state is near two symmetry triangles. The influence of the intermediate principal stress on the bearing capacity of a metallic cantilever beam is related to the beam thickness. The influence of the intermediate principal stress on a plane stress beam is lower than that of a plane strain beam. The influence of the intermediate principal stress on the bearing capacity of a plane strain beam is independent of the beam length. The influence of the intermediate principal stress on the bearing capacity of a plane stress beam is increased firstly and decreased secondly with the beam length increased.
- metalic cantilever beam /
- bearing capacity /
- twin shear uni?ed strength theory /
- intermediate principal stress /
- Lagrangian finite difference

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参考文献(13)

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文章访问数: 622
HTML全文浏览量: 20
PDF下载量: 342
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中间主应力对金属悬臂梁承载力的影响

通讯作者: 马宗源

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出版历程

INFLUENCE OF INTERMEDIATE PRINCIPAL STRESS ON BEARING CAPACITY OF METALLIC CANTILEVER BEAMS

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出版历程

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通讯作者:
马宗源