分层缺损对复合材料结构压缩强度的影响

 以碳纤维增强环氧树脂基复合材料结构为研究对象,设计了含有预埋分层缺陷复合材料层合板的典型试件及压缩试验装置,采用试验与数值模拟相结合的方法,研究了分层缺陷位置、大小对结构压缩强度的影响.研究结果表明,分层缺陷的位置会改变层合板的分层形式,且小尺寸分层缺陷对于层合板的压缩强度几乎无影响.此结论可为复合材料结构应用于飞机结构的设计和制造提供依据.

Influence of the Delamitation Flaw on Compressive Strength of Composite Structure

With a carbon fiber reinforced epoxy resin composite structure as an example, this paper studies the influence of the delamitation flaw on the compressive strength. The typical test pieces with preset delamitation flaws and the related test facilities were designed to test the compressive strength. The effects of the location and the size of the delamitation flaw are studied by numerical simulations combined with experiments. It is shown that the position of the delamitation flaw affects the delamitation form of the laminate and the small scale delamitation flaws do not affect the compressive strength. This conclusion is useful for the design and manufacture of the aircraft structures.