Effect of Laser Forming on the Energy Absorbing Behavior of Metal Foams
Effect of Laser Forming on the Energy Absorbing Behavior of Metal Foams
复制标题
激光成形对泡沫金属吸能行为的影响
DOI：
10.1115/1.4051285
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Yao, Y. Lawrence
中科院分区：
文献类型：
--
作者：
Zhang, Tom;Liu, Yubin;Ashmore, Nathan;Li, Wayne;Yao, Y. Lawrence
金属泡沫的重量轻，并表现出良好的冲击吸收能力。激光成形已成为一种有前途的过程，将金属泡沫板塑造成所需的几何形状。虽然对激光成形的可行性和成形机理进行了研究，但对激光成形工艺对成形泡沫件的力学性能和吸能性能的影响还不清楚。本研究对比研究了这种影响对接收和激光成形闭孔铝合金泡沫的影响。在准静态压缩试验中，关注的是弹性区的变化。激光照射表面附近的缺陷被仔细检查，并用于帮助阐明接收和激光成形样品的异同。同样，从冲击试验中，重点研究了变形和比能吸收的差异，并对泡沫试样的相对密度分布和演化进行了数值研究。
Metal foam is light in weight and exhibits an excellent impact-absorbing capability. Laser forming has emerged as a promising process in shaping metal foam plates into desired geometry. While the feasibility and shaping mechanism has been studied, the effect of the laser forming process on the mechanical properties and the energy-absorbing behavior in particular of the formed foam parts has not been well understood. This study comparatively investigated such effect on as-received and laser-formed closed-cell aluminum alloy foam. In quasi-static compression tests, attention paid to the changes in the elastic region. Imperfections near the laser-irradiated surface were closely examined and used to help elucidate the similarities and differences in as-received and laser-formed specimens. Similarly, from the impact tests, differences in deformation and specific energy absorption were focused on, while relative density distribution and evolution of foam specimens were numerically investigated.