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- 2018
玻璃钢纤维增强塑料薄壁管抗冲击性能的实验研究
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Abstract:
本文采用分离式Hopkinson压杆（SHPB）实验系统，研究了玻璃钢纤维增强塑料（GFRP）薄壁管在低速冲击载荷作用下的抗冲击性能，探讨了薄壁管的截面形状和壁厚对其冲击破坏模式、动态应力-应变曲线和比吸能值（SEA）的影响。实验结果表明：GFRP圆管的动态切线模量较方管的大，同壁厚的圆管的抗冲击性能较方管好；方管随壁厚的适当增加，抗冲击性能也增加。通过综合分析抗冲击性能评价参数，发现GFRP方管的吸能性能较圆管的好，且随壁厚的略微增加，吸能性能增强。与铝合金圆管相比，在相同实验条件下，GFRP圆管的动态压缩模量和冲击应力峰值较铝合金圆管大，峰值应变值较铝合金圆管小，比吸能值较铝合金圆管的大，GFRP管的抗冲击性能也较铝合金圆管好。其结果可为GFRP管类结构的优化设计及工程应用提供基础实验数据和给予理论指导。 Glass fiber reinforced plastic (GFRP) thin-walled tubes have excellent erosion resistant capability and highly feasible design ability, and thus have been shown broad applications in oil and construction industrials. In this paper, we utilized Hopkinson pressure bar(SHPB) system to explore the impact resistance, deformation and failure mode, and dynamic response of GFRP thin-walled tube with different wall thicknesses and shapes. Experimental results prove that the circular tubes possess higher dynamic compression modulus and better impact resistance while the square tubes exhibit more superior energy absorption property. In addition, those performances can be improved with thicker wall. Compared to other traditional aluminum alloy tubes, GFRP tubes show better energy absorption capability. Overall, this study provides significant insights for structural optimization of GFRP tubes and design guidelines on engineer applications. 国家自然科学基金（11572161；11302109）；机械结构强度与振动国家重点实验室（SV2016-KF-17）；浙江省“近海结构冲击安全防护与健康监测”重点科技创新团队（2013TD21）
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