多向嵌入式圆形蜂窝面外动态冲击响应  

Impact Resistance of Polycarbonate CircularHoneycomb under Out-of-Plane Impact Load

作　　者：吴鹏[1,2] 陈利[1,2] 王静[1,2] WU Peng;CHEN Li;WANG Jing(School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China;Ministry of EducationKey Laboratory of Advanced Textile Composites Materials,Institute of Composite Materials,Tiangong University,Tianjin 300387,China)

机构地区：[1]天津工业大学纺织科学与工程学院,天津300387 [2]天津工业大学先进纺织复合材料教育部重点实验室,天津300387

出　　处：《聊城大学学报(自然科学版)》2025年第2期224-231,共8页Journal of Liaocheng University:Natural Science Edition

基　　金：国家重点研发计划项目(2022YFB3706100);天津市院市合作项目(23YFYSHZ00230)资助。

摘　　要：聚碳酸酯(polycarbonate,简称PC)作为常用的工程塑料之一,具有优异的综合性能,而其蜂窝制品因具有较高的抗冲击强度和较低的质量密度被广泛关注。为了提高交错排列下PC圆形蜂窝(PC-RSH)的抗冲击性能,通过向圆形胞元内部四个方向嵌入围绕着微圆结构的“Y”型支撑单元,提出一种多向嵌入式PC圆形蜂窝(PC-MCH)。基于PC-RSH蜂窝样品的面外准静态压缩试验,对试验结果进行了模拟对照,验证模型的可靠性。采用有限元模拟分析的方法,对不同相对密度和不同冲击速度下PC-RSH和PC-MCH的面外冲击动态响应进行了研究,具体包括其变形模式、应力-应变曲线以及能量吸收能力等。结果表明,在等相对密度的条件下,向胞元内部嵌入支撑结构,能够改变结构受冲击变形的位置,并且具有更高的平台应力。此外,在不同冲击速度条件下,PC-MCH的单位质量吸能值均优于PC-RSH。平台应力和比吸能的最大改善程度分别达到29.06%和26.03%,说明支撑单元的嵌入可以提高结构的能量吸收能力。所得结果可为蜂窝结构冲击动力学研究及结构设计提供理论参考。Polycarbonate(PC),as one of the commonly used engineering plastics,exhibits excellent comprehensive properties.Its honeycomb structures,known for their high impact strength and low mass density,have garnered significant attention.To enhance the impact resistance of staggered PC circular honeycombs(PC-RSH),a novel multi-directionally embedded PC circular honeycomb(PC-MCH)was proposed.This design involves embedding"Y"-shaped beam units oriented in four directions around a micro-circular structure within the circular cell units.Based on out-of-plane quasi-static compression tests of PC-RSH honeycomb samples,the reliability of the model was verified by simulating and comparing the test results.Using finite element simulation analysis,the dynamic response of PC-RSH and PC-MCH under different relative densities and impact velocities was investigated,including deformation modes,stress-strain curves,and energy absorption capabilities.The results indicate that,under the condition of equal relative density,embedding the support structures inside the cells alters the impact deformation location of the structure and provides higher plateau stress.Furthermore,under different impact velocities,the energy absorption per unit mass of PC-MCH outperforms that of PC-RSH.The maximum improvements in plateau stress and specific energy absorption were 29.06%and 26.03%,respectively,demonstrating that the insertion of the support units enhances the energy absorption capacity of the structure.The obtained results can provide theoretical references for the study of honeycomb structure impact dynamics and structural design.

关 键 词：聚碳酸酯 面外冲击 平台应力 变形模式 比吸能 

分 类 号：TB383.4[一般工业技术—材料科学与工程]