Thin-Walled Structures ( IF 6.4 ) Pub Date : 2020-06-27 , DOI: 10.1016/j.tws.2020.106923 Douglas Tomlinson , Amir Fam
The response of non-slender flax fibre reinforced polymer (FFRP)-skinned foam filled tubes under axial compression was investigated using 39 specimens. Different cross-ply fibre arrangements and foam densities (33–65 kg/m3) were tested; the responses were compared to hollow FFRP tubes and Glass-FRP (GFRP) skinned tubes. Although axial behaviour was not significantly affected by changing foam density, hollow tubes were weaker than foam filled sections. This suggests that low density foam is effective at preventing premature failure. FFRP-skinned tubes with a skin thickness of 6.4 mm behaved similarly to GFRP-skinned tubes with a skin thickness of 3.4 mm in terms of strength and stiffness but were considerably better at absorbing energy. Specific strength and stiffness were highest with the lightest foam. The best performing FFRP-skinned tubes had specific strengths about 75% that of GFRP-skinned tubes with similar dimensions and equivalent foam cores.
中文翻译:
亚麻纤维增强聚合物皮管与轻质泡沫芯和生物树脂共混物的轴向响应
使用39个样本研究了非细长亚麻纤维增强聚合物(FFRP)蒙皮的泡沫填充管在轴向压缩下的响应。不同的交叉纤维排列和泡沫密度(33–65 kg / m 3)经过测试;将响应与空心FFRP管和Glass-FRP(GFRP)蒙皮管进行比较。尽管轴向行为不受泡沫密度变化的显着影响,但空心管比泡沫填充截面要弱。这表明低密度泡沫可有效防止过早失效。在强度和刚度方面,表皮厚度为6.4 mm的FFRP皮管的性能与表皮厚度为3.4 mm的GFRP皮管相似,但在吸收能量方面要好得多。泡沫最轻时的比强度和刚度最高。性能最佳的FFRP蒙皮管的比强度约为具有相似尺寸和等效泡沫芯的GFRP蒙皮管的75%。