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中文核心期刊

壁厚对金属圆管撕裂卷曲耗能影响的研究

Research for the influence of thickness on the energy distribution of splitting and curling circular steel tube

  • 摘要: 对置于锥型刚性底座上内径D为54.4\,mm的7种不同壁厚A3无缝圆钢管,在轴压作用下撕裂卷曲破坏进行了较为系统的实验研究. 实验过程中记录了载荷-位移曲线,并得到试件螺旋状残余变形模态. 对实验结果的分析中认为耗散能主要由撕裂能、塑性弯曲变形能和摩擦能3部分构成. 分析结果表明,圆管壁厚对撕裂能和塑性弯曲变形能在总能耗中所占比例的影响较明显,对摩擦能所占比例的影响甚微.

     

    Abstract: This paper reports the experimental studies and theoreticalanalyses on axial splitting and curling of A3 steel tubes with differentthickness on a conical die. Seven groups of metal circular tubes, withdiameter D=54.4\,mm, are used as the text specimens. The force-compressioncurves and deformation modes of specimens are recorded. Three energydissipation mechanisms are involved: tearing energy, plastic bending energyand friction energy during the specimens deformation. Theoretical analysesfind that the influence of tube-thickness on the ratios of tearing energy andthe plastic energy to the total energy is considerable and on the ratio offrictional energy to the total energy is slight.

     

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