为了车辆顺利出口东盟,根据新车研发的需要,以东盟国家新车评价体系:ASEAN-NCAP(New Car Assessment Program for Southeast Asian Countries)下腿型保护满足限值为目标,搭建柔性腿(Flexible Pedestrain Legform Impactor,Flex-PLI)碰...为了车辆顺利出口东盟,根据新车研发的需要,以东盟国家新车评价体系:ASEAN-NCAP(New Car Assessment Program for Southeast Asian Countries)下腿型保护满足限值为目标,搭建柔性腿(Flexible Pedestrain Legform Impactor,Flex-PLI)碰撞有限元模型并计算求解。针对车辆设计存在的问题,提出改进方案并通过仿真验证可行,最后通过实车验证测试,试验结果验证了仿真的可靠性,为行人小腿保护开发积累了经验。展开更多
It has been reported that the ply gap influences the ballistic resistance of spaced multi-ply fabric systems,but its working mechanism was not well-understood. This paper reports the experimental and numerical approac...It has been reported that the ply gap influences the ballistic resistance of spaced multi-ply fabric systems,but its working mechanism was not well-understood. This paper reports the experimental and numerical approaches and results of an investigation on the mechanisms that enable the improved ballistic performance of spaced multi-ply systems. Penetration tests were performed over a range of impact velocities ranging from 200 m/s to 400 m/s. The results confirmed that the ply gap is beneficial to the energy absorption capability of the systems. This is because the front plies tend to absorb more energy when they are not immediately constrained by the rear plies. During a ballistic event, the gap relieves the reflection of the compressive pulse, prolonging the projectile engagement time with the front plies;on the other hand, the rear plies become increasingly less active in dissipating energy as the gap increases.When the gap is sufficiently widened to avoid any interference between the plies before the failure of the front ply, the responses of the whole system no longer vary. It was also found that the ballistic performance of the spaced systems is influenced by ply thickness, impact velocity, and the stacking order of the ply gap.展开更多
文摘为了车辆顺利出口东盟,根据新车研发的需要,以东盟国家新车评价体系:ASEAN-NCAP(New Car Assessment Program for Southeast Asian Countries)下腿型保护满足限值为目标,搭建柔性腿(Flexible Pedestrain Legform Impactor,Flex-PLI)碰撞有限元模型并计算求解。针对车辆设计存在的问题,提出改进方案并通过仿真验证可行,最后通过实车验证测试,试验结果验证了仿真的可靠性,为行人小腿保护开发积累了经验。
基金supported by the National Natural Science Foundation of China (Grant Nos. 51708553, 12202498, 52371299,12302187)Natural Science Foundations of Jiangsu Province (Grant No. BK20210438)Knowledge Innovation Program of WuhanShuguang Project (Grant No. 202201080102)。
文摘It has been reported that the ply gap influences the ballistic resistance of spaced multi-ply fabric systems,but its working mechanism was not well-understood. This paper reports the experimental and numerical approaches and results of an investigation on the mechanisms that enable the improved ballistic performance of spaced multi-ply systems. Penetration tests were performed over a range of impact velocities ranging from 200 m/s to 400 m/s. The results confirmed that the ply gap is beneficial to the energy absorption capability of the systems. This is because the front plies tend to absorb more energy when they are not immediately constrained by the rear plies. During a ballistic event, the gap relieves the reflection of the compressive pulse, prolonging the projectile engagement time with the front plies;on the other hand, the rear plies become increasingly less active in dissipating energy as the gap increases.When the gap is sufficiently widened to avoid any interference between the plies before the failure of the front ply, the responses of the whole system no longer vary. It was also found that the ballistic performance of the spaced systems is influenced by ply thickness, impact velocity, and the stacking order of the ply gap.
