圆形薄壁构件准静态径向压缩下的吸能特性分析

发布时间：2018-06-10 20:26

本文选题：圆形薄壁构件 + 准静态　；参考：《材料科学与工程学报》2016年04期

【摘要】：为探讨薄壁吸能构件径向压缩下的吸能防冲特性,以圆形薄壁构件为例,采用理论分析、数值模拟和实验研究方法,对构件径向压缩下的吸能防冲特性进行研究,得出以下主要结论:构件压缩过程中具有稳定的变形破坏模式和较为恒定的承载力。内径对载荷波动系数、冲程效率和总吸能影响较小,压溃峰值载荷、平均压溃载荷随内径增加而降低。构件压溃峰值载荷、平均压溃载荷和总吸能均随壁厚增加而增大,载荷波动系数和冲程效率随壁厚增加而降低。长度对载荷波动系数和冲程效率影响较小,构件压溃峰值载荷、平均压溃载荷和总吸能均随长度增加而增大。研究结果为圆形构件尺寸选取提供理论依据,为其它类型薄壁构件径向压缩吸能特性分析提供参考。
[Abstract]:In order to study the energy absorption and anti-scour characteristics of thin-walled energy-absorbing members under radial compression, taking circular thin-walled members as an example, theoretical analysis, numerical simulation and experimental research methods are used to study the characteristics of energy absorption and anti-scouring under radial compression of thin-walled members. The main conclusions are as follows: there are stable deformation and failure modes and constant bearing capacity during compression. The internal diameter has little effect on load fluctuation coefficient stroke efficiency and total energy absorption. The peak load and average collapse load decrease with the increase of inner diameter. The peak load, average crushing load and total energy absorption increase with the increase of wall thickness, while the load fluctuation coefficient and stroke efficiency decrease with the increase of wall thickness. The length has little effect on load fluctuation coefficient and stroke efficiency. The peak load, average burst load and total energy absorption increase with the increase of length. The results provide a theoretical basis for the size selection of circular members and a reference for the analysis of radial compression energy absorption characteristics of other types of thin-walled members.
【作者单位】：辽宁工程技术大学力学与工程学院;北京市公联公路联络线有限责任公司;
【基金】：辽宁省教育厅科技研究资助项目(L2015218) 辽宁工程技术大学基金资助项目(20160027T) 国家自然科学基金资助项目(51374119)
【分类号】：O347

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