semi-elastic impact

Finite Element Analysis of Impact between Heavy Vehicle and Semi-rigid Guardrail

重型车辆与半刚性护栏碰撞的有限元分析

The effect of rare earth on impact fatigue property of cast semi steel was studied.

研究了稀土元素对半钢冲击疲劳性能的影响.

The tolerance of zooplankton is stronger than that of phytoplankton, which is different among species. Temperature elevation in receiving sea area generally has no impact on the survival of zooplankton because of the large span between semi-lethal temperature ( LT50) and natural living temperature.

浮游动物的耐热性强于浮游植物，并存在种间差异，由于半致死温度（LT50）与自然适应水温的跨度较大，温排水造成的海域温升基本不影响受纳海域的浮游动物存活。

Therefore, the monitoring and control of the solid-phase volume fraction is a very important process in the thixotropic casting process, which has a direct impact on the shaping performance of semi-solid billet.

因此，固相体积分数的测控是半固态触变铸造过程中一个非常重要的环节，它直接影响着半固态坯料的成形性能。

In this paper, the problem of penetrating into semi-infinite thick target is divided into rigid projectiles penetration, high-speed long rods penetration, and penetration problems that impact speed changes in large range. Theoretical analysis and numerical simulations are carried out systematically to study these problems.

本文针对侵彻半无限厚靶问题，将其划分成刚性弹侵彻、长杆弹高速侵彻、大范围着速的侵彻问题等方面，系统地开展了理论分析和数值模拟研究。