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首页> 外文会议>International Conerence on Damage Assessment of Structues >Effect of Damage on the Energy Absorption of Prismatic Thin-Walled Polymer Composite Structures
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Effect of Damage on the Energy Absorption of Prismatic Thin-Walled Polymer Composite Structures

机译：损伤对棱镜薄壁聚合物复合结构能量吸收的影响

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摘要

This paper investigates the effect of three types of simulated damage on the specific energy absorption (SEA) under axial crashing of square section E-glass/polyester composite tubes. Damage was simulated by through-drilled holes of various sizes, by delaminations of different sizes and by zones of out-of-plane impact damage created using a hemispherical tup driven at different energy levels. Also, in order to increase tolerance to out-of-plane impact damage, a thermoplastic interleaf was moulded into a number of samples. Tube samples were crushed axially at quasi-static (5mm/min) and impact (5ms{sup}(-1)) rates. SEA was seen to be strongly influenced by loading rate and significant reductions in SEA were seen as rate increased. Below a certain threshold damage level (or size) there was no effect on the SEA. Above this threshold, the damage triggered unstable failure - leading to greatly reduced energy absorption capability. The threshold level was seen to be dependent on damage type, damage level and test rate and a significant improvement in damage tolerance was seen as the loading rate increased. The SEA for thermoplastic interleaf samples was reduced, but became independent of rate.
机译：本文研究了三种类型的模拟损伤对方形剖面E-玻璃/聚酯复合管轴碰撞下的特定能量吸收（海）的影响。通过各种尺寸的通过钻孔孔模拟损坏，通过不同尺寸的分层和使用在不同能量水平驱动的半球图案产生的面间冲击损伤的区域的分层模拟。此外，为了增加对外平面冲击损伤的耐受性，将热塑性嵌合物模塑成多个样品。管样品在准静态（5mm / min）和冲击（5ms {sup}（ - 1））速率下挤压。看到海上受到载荷率强烈影响，随着速度的增加，海上的重大减少。低于某种阈值损伤水平（或尺寸）在海上没有影响。高于此阈值，损坏触发不稳定的故障 - 导致能量吸收能力大大降低。观察到阈值水平依赖于损伤类型，损伤水平和测试率以及损坏耐受性的显着改善，随着装载速率的增加。用于热塑性嵌合样品的海洋减少，但与速率无关。

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