The mechanical behavior of the extruded 7003-T6 aluminum profiles used as automotive buffer beams is investigated. The correlation of the texture and the formation of the adiabatic shear band is analyzed. Copper texture, R texture, and S texture are the main reasons for the anisotropy of mechanical behavior of the profile, resulting in that the stress of the profile along the extrusion direction is higher than that perpendicular to the extrusion direction. Through finite element modeling (FEM), it can be found that the adiabatic shear band is developed in the sample if the dynamic loading direction is parallel to the extrusion direction, but it does not appear if the loading direction is perpendicular to the extrusion direction. When the dynamic loading direction is parallel to the extrusion direction, higher stress results in a lower energy barrier for shear localization. Therefore, the formation of the adiabatic shear band is susceptible along but is not sensitive perpendicular to the extrusion direction. This study provides technical support for the service of 7003 aluminum alloy in automobiles, which has important academic and engineering application value.

中文翻译：

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7XXX铝合金动态加载过程中织构与绝热剪切带形成的相关性

研究了用作汽车缓冲梁的挤压 7003-T6 铝型材的机械性能。分析了织构与绝热剪切带形成的相关性。铜织构、R织构和S织构是造成型材力学行为各向异性的主要原因，导致型材沿挤压方向的应力高于垂直于挤压方向的应力。通过有限元建模（FEM）可以发现，如果动态加载方向与挤压方向平行，则在样品中产生绝热剪切带，而如果加载方向与挤压方向垂直，则不出现。当动态加载方向与挤压方向平行时，较高的应力导致剪切局部化的能垒较低。因此，绝热剪切带的形成沿挤压方向敏感但垂直于挤压方向不敏感。本研究为7003铝合金在汽车上的服役提供了技术支持，具有重要的学术和工程应用价值。