丁文有,何晓聪,刘洋,邓聪,刘佳沐.泡沫镍三明治结构自冲铆接头的力学性能[J].有色金属工程,2018,8(3):.
泡沫镍三明治结构自冲铆接头的力学性能
The mechanical properties of self-piercing riveted sandwich structure joint with nickel foam
投稿时间:2017-05-04  修订日期:2017-06-09
DOI:
中文关键词:  自冲铆  泡沫镍夹层  AA5052铝合金  三明治结构  失效形式  能量吸收
英文关键词:self-piercing riveted  nickel foam  aluminum alloy  sandwich structure  static failure strength  energy absorption
基金项目:国家自然科学基金资助项目(51565023)
              
作者单位
丁文有 昆明理工大学 机电工程学院
何晓聪 昆明理工大学 机电工程学院
刘洋 昆明理工大学 机电工程学院
邓聪 昆明理工大学 机电工程学院
刘佳沐 昆明理工大学 机电工程学院
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中文摘要:
      为探究三明治结构自冲铆接头的力学性能,以自冲铆连接设备对AA5052铝合金板料和泡沫镍夹层进行连接;通过拉伸-剪切试验研究接头的峰值载荷、最大位移及能量吸收能力,并分析接头的失效形式及宏观失效机理;此外,运用MATLAB对接头的峰值载荷和最大位移进行分析。结果表明:泡沫镍夹层有利于增大接头的钉脚张开度,并改善应力分布。泡沫镍夹层使接头静失效载荷增加了8.9%;随着泡沫镍夹层厚度的增加,三明治结构自冲铆接头的抗拉强度呈降低趋势,但接头的能量吸收值相对提高;AA5052铝合金三明治结构自冲铆接头的失效模式为铆钉脱离下板。
英文摘要:
      To investigate the mechanical properties of self-piercing riveted(SPR) sandwich structure joint, AA5052 aluminum alloy sheets and nickel foam interlayer were joined by SPR equipment. The tensile-shear tests were carried out to study the peak loads and energy absorption properties of the joints, the failure modes as well as the macroscopic failure mechanism about the joints was analyzed. Moreover, the peak loads and maximum displacements of joints was researched by using MATLAB. The results indicate that it’s beneficial to increase rivet flaring of the joints by using nickel foam interlayer, which also improve the distribution of stress. The tensile strength of the joint has increased by 8.9% because of the nickel foam interlayer. with the increase in the interlayer thickness, the tensile strength of joint was in a decreasing trend, however, the energy absorption value was improved relatively. The SPR sandwich structure joint with nickel foam failed by the rivet being pulled out from the lower sheet.
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