压缩载荷作用下复合材料开孔补强稳定性分析

Open-Hole Strengthening for Composite Laminate Stability under Compression

运用有限元软件MSC.Nastran分别分析了压缩载荷作用下的复合材料板在无孔、开孔及开孔补强后的稳定性问题。在开孔复合材料板稳定性分析中,讨论了开孔孔径和开孔位置的影响;在补强中,分别选取不同开孔孔径和开孔位置研究补强参数对板稳定性的影响。研究表明:开孔降低了复合材料板的稳定性,通过补强可提高其稳定性;开孔孔径和开孔位置对复合材料板稳定性的影响较大,补强参数随开孔孔径和开孔位置改变而改变,且对复合材料板的稳定性有所影响;补强后板的稳定性要好于无孔复合材料板的稳定性。

The stability of composite laminates which have no hole, an open-hole and open-hole strengthening under compression is analyzed with FE software of MSC.Nastran. The factors about the diameter and position of open-hole are discussed, the parameters of different open-holes are evaluated in the open-hole strengthening. The results show that the stability of composite laminate is reduced in case of an open-hole, and improved while strengthened. The diameter and position of the strengthened open-hole exert obvious influence on the stability. The stability of the strengthened composite laminate gets better than the original one.