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A new form of equivalent stress for combined axial-torsional loading considering the tension-compression asymmetry of polymeric materials

机译:考虑聚合物材料的张力压缩不对称的组合轴向扭转加载的一种新形式的等效应力

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摘要

Although the von Mises criterion has been generally adopted to obtain the equivalent stress for materials under multiaxial loading, it does not consider the influence of the tension-compression asymmetry of pressure-sensitive materials. For polymeric materials, to include the non-negligible effect of the tension-compression asymmetry, this work proposes a new form of equivalent stress in which the tensile and compressive yield strengths are presented. This form is compared with the work of von Mises, Bai and Christensen with the support of experimental data. It was found that the proposed form is more suitable for polymeric materials under combined axial-torsional loading conditions. The implications of the present findings for designing stress-controlled combined axial-torsional loading experiments are also discussed.
机译:虽然通常采用VON误判标准来获得多轴负载下材料的等效应力,但它不考虑压敏材料的张力压缩不对称的影响。 对于聚合物材料,为了包括张力压缩不对称的不可忽略的效果,该工作提出了一种新的等效应力,其中提出了拉伸和压缩屈服强度。 将这种形式与Von Mises,Bai和Christensen的工作进行比较,并支持实验数据。 发现所提出的形式更适合于组合轴向扭转负载条件下的聚合物材料。 还讨论了对设计应力控制的组合轴向扭转负载实验的目前研究结果的影响。

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  • 来源
    《RSC Advances》 |2015年第89期|共5页
  • 作者单位

    Southwest Jiaotong Univ Sch Mech &

    Engn Appl Mech &

    Struct Safety Key Lab Sichuan Prov Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ Sch Mech &

    Engn Appl Mech &

    Struct Safety Key Lab Sichuan Prov Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ Sch Mech &

    Engn Appl Mech &

    Struct Safety Key Lab Sichuan Prov Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ Sch Mech &

    Engn Appl Mech &

    Struct Safety Key Lab Sichuan Prov Chengdu 610031 Sichuan Peoples R China;

    Southwest Jiaotong Univ Sch Mech &

    Engn Appl Mech &

    Struct Safety Key Lab Sichuan Prov Chengdu 610031 Sichuan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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