复合材料泡沫夹芯板胶接修理的压缩性能

Compression Performance of Adhesively Repaired Foam Core Sandwich Composite

针对复合材料泡沫夹芯结构在维修结构性能研究方面的缺失,在完成了复合材料泡沫夹芯板的维修与压缩性能测试之后,建立了结构有限元分析模型,结合夹芯结构的稳定性理论解析模型,并对复合材料泡沫夹芯结构的胶接修理压缩性能进行验证。结果表明:通过试验结果简化了有限元分析模型中的胶层设置;应用复合材料夹芯结构的稳定性理论解析模型,能够快速获得复合材料夹芯维修结构的侧压极限载荷上限值;复合材料泡沫夹芯修理结构的主要侧压破坏模式为面板一阶与二阶屈曲失效,该结果说明复合材料泡沫夹芯修补结构的有限元模型与解析稳定性理论模型的计算精度较高,具有较强的工程实用性。

Due to lack of researches on the structural performance of adhesively repaired foam core sandwich composite,both a finite element model and a stability analytical model were built after repairing the sandwich composite and compressive experiment.The two models were validated by comparing them with the experiment.The adhesive was simplified in the finite element model.The results show that the critical compressive load can be obtained efficiently by using the stability analytical model for sandwich structures.The main failure modes of the adhesively repaired foam sandwich composite under compressive load are the first-order and second-order buckling.The finite element analysis model and the stability analytical model of adhesively repaired sandwich composite are accurate enough and have good potentials in engineering fields.