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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >A crumb rubber modified syntactic foam
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A crumb rubber modified syntactic foam

机译：碎橡胶改性的复合泡沫

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摘要

In this study, the impact response and residual strength of a crumb rubber modified syntactic foam, which contained up to 20% by volume of crumb rubbers, were investigated. The foam had a hybrid microstructure bridging over several length scales. It was formed by dispersing hollow glass beads and crumb rubber particles into a microfiber and nanoclay filled epoxy matrix. Sandwich beam specimens were prepared using the hybrid foam as core and fiber reinforced epoxy as facings. A low velocity impact test using an instrumented drop tower impact machine was conducted on the sandwich beams and control beams made of the foam only. Four-point bending tests were conducted on the impact damaged specimens and control specimens without impact damage. The effect of the hybrid foam on the low velocity impact response and residual strength was evaluated based on the test results. The stress field interaction was evaluated using a finite element analysis. It was found that the rubberized syntactic foam possessed a higher capacity to dissipate impact energy and to retain bending strength. There was a positive composite action between the hollow glass bead particles and crumb rubber particles by means of stress field interaction and reduction in stress concentration.
机译：在这项研究中，研究了一种抗碎橡胶改性的复合泡沫的冲击响应和残余强度，该泡沫包含高达20％的抗碎橡胶。泡沫具有在多个长度尺度上桥接的杂化微观结构。它是通过将中空玻璃珠和橡胶屑颗粒分散到超细纤维和纳米粘土填充的环氧基质中形成的。使用混合泡沫材料作为芯材，纤维增强环氧树脂作为饰面，制备了夹层梁试样。使用仪器式落塔式冲击机对仅由泡沫制成的夹层梁和控制梁进行了低速冲击试验。对受冲击破坏的试样和无冲击破坏的对照试样进行四点弯曲试验。根据测试结果评估了混合泡沫对低速冲击响应和残余强度的影响。使用有限元分析评估了应力场的相互作用。已经发现，橡胶化的复合泡沫具有更高的消散冲击能和保持弯曲强度的能力。中空玻璃微珠颗粒和碎橡胶颗粒之间通过应力场相互作用和应力集中的减少而产生了积极的复合作用。

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