泡沫夹芯结构双侧挖补法修理分析与试验探讨

以泡沫夹芯结构为研究对象,通过四点弯曲试验研究了完好结构、损伤后结构和采用双侧挖补法复合材料补片修理后结构的承载能力.试验结果显示,试件未在修理区域破坏,而是远离修理区的加载处泡沫芯材破坏;试件中心点处应变相同时,修补后结构的承载能力小于完好件承载能力的80%.文中对产生这些问题的原因和解决措施进行了探讨.另外,采用ABAQUS有限元软件对以上几种结构进行了模拟分析,分析结果与试验结果吻合较好.

ANALYSIS AND EXPERIMENTAL VERIFICATION ON SCARF PATCH REPAIR OF FOAM-CORE SANDWICH STRUCTURE

In this paper, the load capabilities of undamaged, damaged and double-sided scarf patch repaired foam-core sandwich structures are tested through the four-point-bending test. The test results show that the specimen will not fail at the repaired zone but at the loading position far away from the repaired zone. The maximum load applicable for the repaired structure is lower than that for the undamaged structure. Possible reasons and solutions for these problems are discussed in this paper. The simulation of the structure before and after being repaired by the finite element method(FEM) analysis shows that the analysis results agree well with the test results.