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Effect of laser patterning on axial crushing performance of cylindrical 22MnB5 tubes
Composite Structures ( IF 6.3 ) Pub Date : 2021-01-26 , DOI: 10.1016/j.compstruct.2021.113633
Hyung-gyu Kim , Jonghun Yoon

This paper describes the effects of various laser patterns on as-received 22MnB5 tubes for selective local strengthening. It has been confirmed that strengthened cross-sectional areas, perpendicular to the axial direction by laser patterning, and uniform strength distributions between the as-received and strengthened area can induce the concertina mode under axial crushing. The auxetic and helical laser patterns demonstrated the highest first peaks in the reaction force and substantial energy absorption due to progressive folding, followed by the concertina mode. Considering the fabrication efficiency, the helical pattern is recommended because it can be easily implemented. To optimize the helical pattern design, the specific pitch size should be based on the line length of a single fold along the neutral surface when the as-received tube collapses. Depending on the geometrical dimensions of the tube, this can increase the number of folds and maximise energy absorption by up to 32.2% during axial crushing.



中文翻译:

激光图案化对22MnB5圆柱管轴向破碎性能的影响

本文描述了各种激光模式对接收到的22MnB5管的影响,以进行选择性的局部加固。已经证实,通过激光图案化垂直于轴向的增强的横截面面积以及所接收的和增强的区域之间的均匀强度分布可以在轴向压碎下诱发六角形模。渐层和螺旋状激光图案显示出最高的第一峰值反作用力,并且由于逐渐折叠而产生大量的能量吸收,随后出现六角琴模式。考虑到制造效率,推荐螺旋图案,因为它易于实现。为了优化螺旋图案设计,具体的节距大小应基于接收到的管子塌陷时沿中性表面的单折线的长度。根据管子的几何尺寸,这可以增加折叠次数,并在轴向破碎过程中使能量吸收最大化,最高可达32.2%。

更新日期:2021-02-05
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