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首页> 外文期刊>Composite Structures >In-plane quasi-static and out-of-plane dynamic behavior of nanofiber interleaved glass/epoxy composites and finite element simulation
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In-plane quasi-static and out-of-plane dynamic behavior of nanofiber interleaved glass/epoxy composites and finite element simulation

机译：纳米纤维交织玻璃/环氧复合材料的面内静态和平面外动态行为及有限元模拟

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摘要

Eight-ply glass/epoxy composites interleaved by electrospun Polysulfone (PSF) nanofibers were manufactured by vacuum-assisted hand lay-up method. The effect of nanofibrous interlaminar layers on the mechanical performance of laminated composites was investigated under both in-plane quasi-static and out-of-plane lowvelocity impact (LVI) test conditions. Low-velocity impact responses of reference and nanofiber interleaved composite laminates were modeled by LS-Dyna finite element (FE) code for numerical simulations. The results of the quasi-static mechanical tests show that PSF nanofiber interleaving increases the tensile and compressive strength by 10.5% and 25.5%, respectively. PSF nanofibers played an important role in improving the impact damage resistance of composite laminates with increasing impact energy levels. The low-velocity impact tests results indicated that PSF nanofibers decreased the fiber breakage area at 20 J and 30 J energy levels by about 26% and 28%, respectively. Besides, PSF nanofiber interleaving improved damage threshold load values by 4.8%, 15.2%, and 23% at 10 J, 20 J, and 30 J energy levels, respectively. Experimental and FE simulation results were comparatively presented in terms of force-time, force-deflection, and energy-time curves. A good agreement was achieved between experimental and simulation results.
机译：通过真空辅助手叠层制造电纺聚砜（PSF）纳米纤维的八个玻璃/环氧复合材料通过真空辅助的手叠层制造。在面内静态和外平面低差影响（LVI）测试条件下研究了纳米纤维层层对层压复合材料的机械性能的影响。参考和纳米纤维交织复合层压板的低速冲击应答由LS-DYNA有限元（FE）代码为数值模拟。准静态机械测试的结果表明，PSF纳米纤维交织分别将拉伸和抗压强度增加10.5％和25.5％。 PSF纳米纤维在提高复合层压板的抗冲击能量水平时发挥了重要作用。低速冲击试验结果表明，PSF纳米纤维分别在20J和30J能量水平下降低了约26％和28％的纤维破裂面积。此外，PSF纳米纤维交织分别将损伤阈值载荷值改善为4.8％，15.2％和23％，分别在10 j，20 j和30 j能量水平下。实验和FE模拟结果在力 - 时间，力偏转和节能曲线方面进行了相对呈现。实验和模拟结果之间实现了一个良好的一致性。

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