CAJ | 학술논문

随着复合材料夹芯结构在航空领域的广泛应用，对其抗冲击性能的研究变得越来越重要。本文对泡沫夹芯结构的低速冲击问题采用试验及数值分析的手段进行研究，比较了不同冲击能量下泡沫夹芯结构的冲击响应特点，并利用数值分析手段揭示了冲击损伤的破坏机理，同时计算得到了该夹芯结构的临界冲击能量，模拟结果与试验吻合较好，可为工程设计提供一定的参考；同时对比分析了全模型与1／4模型、衰减参数、衰减次数对冲击响应分析结果的影响。结果表明：采用1／4模型，考虑泊松比的参数衰减以及50次退化方式能够提高数值模拟的计算效率和精度。
수착복합재료협심결구재항공영역적엄범응용，대기항충격성능적연구변득월래월중요。본문대포말협심결구적저속충격문제채용시험급수치분석적수단진행연구，비교료불동충격능량하포말협심결구적충격향응특점，병이용수치분석수단게시료충격손상적파배궤리，동시계산득도료해협심결구적림계충격능량，모의결과여시험문합교호，가위공정설계제공일정적삼고；동시대비분석료전모형여1／4모형、쇠감삼수、쇠감차수대충격향응분석결과적영향。결과표명：채용1／4모형，고필박송비적삼수쇠감이급50차퇴화방식능구제고수치모의적계산효솔화정도。
The mechanical properties of sandwich composites become more and more important as a result of the wide field application of the sandwich composites. Firstly, both experimental test and numerical computation are used to analyze the performance of sandwich composites in low-velocity impact. The dynamic responses of sand- wich composites are observed under different impact energies. The damage mechanism is figured out and the critical energy is obtained by the numerical computation method. Simulation result and experiment agree well. It can provide certain reference for engineering design. The influence of the whole model and the quarter model, the reduced parameters, reduced frequency to impact response analysis are researched. The results show that u- sing the method of quarter model, reduced parameters considered with Poisson ratio, 50 times reduced frequency can improve the efficiency and precision of numerical simulation.