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LOAD RATE EFFECTS ON THE CRUSH RESPONSE OF LAMINATED CORRUGATED BEAMS

机译:负载率对层压波纹梁的挤压响应的影响

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This experimental study addresses the progressive crushing responses of laminated corrugated beams fabricated using Newport NB321/7781 E-glass prepreg material. Stacking sequences of [0]_n and [±45]_n, where n=4,8 and 12 have been used. The progressive crushing behavior has been studied at quasi-static rates and at selected dynamic loading rates. The test data indicates that the peak load levels increase with load rate, while the sustained crushing load decreases. [0]_n surpass [±45]_n in terms of energy absorbing capability at various loading rates by at least 30%. The failure modes in [0]_n beams was observed to be rate sensitive with the number of fronds and frond fragmentation changing with test speed.
机译:该实验研究解决了使用Newport NB321 / 7781 E玻璃预浸料材料制造的层叠波纹梁的渐进式压碎响应。 [0] _N和[±45] _N的堆叠序列,其中已经使用n = 4,8和12。已经以准静态速率和选择的动态加载率研究了渐进式破碎行为。测试数据表明峰值负载水平随负载率而增加,而持续的粉碎负荷减小。在各种加载率下,在能量吸收能力方面_N超越[±45] _N至少30%。观察到[0]梁梁中的故障模式为率敏感,与测试速度的叶子和叶片碎片的数量变化。

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