带损伤复合材料层压板剩余强度估算方法研究  

RESIDUAL STRENGTH ESTIMATION OF COMPOSITE LAMINATES WITH DAMAGE

作　　者：唐啸东 沈真 陈普会 杨胜春 杨旭[2] 陈业标 

机构地区：[1]飞机强度研究所 [2]沈阳飞机研究所 [3]成都飞机研究所

出　　处：《航空学报》1997年第2期146-152,共7页Acta Aeronautica et Astronautica Sinica

摘　　要：针对带损伤，特别是冲击损伤的复合材料层压板的剩余强度估算，提供易于工程使用的思路和方法。包括：①提出了一种不依赖具体分析方法的统一的损伤记录与表征方法——损伤数据结构ＤＤＳ；②提出了一种全新的缺口强度破坏判据——损伤影响（ＤＩ）破坏判据；③提出了简单易用的估算冲击分层的弯曲应变能密度分层模型；④提出了一套能够分析包括预埋分层和冲击分层在内，并能够处理单一分层以及多分层的损伤剩余强度估算方法。对共计１２种材料体系、５２种铺层形式的开孔拉抻强度、预埋分层压缩强度及冲击后压缩强度进行了大量估算分析，与近百组试验结果相比均有良好一致性。An engineering approach is developed for the residual strength analysis of damaged, specially impacted, laminated composites. The main features of the approach are ① an independent damage characterization method, Damage Data Structure, DDS, ② a New failure criterion——Damage Influence (DI) criterion for notched specimen, ③a simple model, Bending Strain Energy Density (BSED), for impact damage prediction, ④an algorithm of residual strength analysis for single and or multiple delaminations, either introduced by impact or preimplanted. The applicability and effectiveness of this approach were validated by numerical analysis for notched tension, compression of impacted and preimplanted delamination, for 52 different lay ups and of 12 material systems. Good consistency of analysis results with test results is obtained.

关 键 词：复合材料 层压板 损伤 强度 

分 类 号：TB330.1[一般工业技术—材料科学与工程]