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具有材料张力-压缩不对称性的吊杆梁的弹性-塑料变形分析
Xiao-Ting He1,2, Jing-Miao Yin1, Zhi-Peng Chen1
1School of Civil Engineering, Chongqing University, Chongqing 400045, China.
Materials (Basel, Switzerland)
|December 31, 2025
概括
本研究分析了悬臂束变形,考虑具有不对称张力和压缩特性的材料. 结果显示,与经典模型相比,这种不对称性增加了偏移和剩余偏移.
科学领域:
- 结构工程 结构工程
- 材料科学 材料科学 材料科学
- 固体力学 固体力学是什么
背景情况:
- 吊杆束变形是弹性-塑性分析中的经典问题.
- 传统分析假设相同的弹性模量和收益强度在张力和压缩 (张力-压缩对称性).
研究的目的:
- 分析悬臂梁的弹性-塑性反应与张力-压缩不对称的材料.
- 为了研究不对称材料特性对光束偏移和残余偏移的影响.
主要方法:
- 在装载和卸载阶段对弹性-塑料反应的理论分析.
- 在自由端的最大屈曲率和剩余屈曲率的推导.
- 使用数值模拟验证理论解决方案.
主要成果:
- 张力-压缩不对称性改变了塑料区域的长度从经典的1/3值,增加了它.
- 不对称的材料特性在弹性-塑性反应过程中增加了位移.
- 最终载荷偏移和残余卸载偏移大于对称情况.
结论:
- 张力-压缩不对称性显著影响横杆梁的行为.
- 这些发现为精确分析和设计使用不对称材料的梁提供了理论基础.
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