Investigation of Stiffening and Curvature Effects on the Residual Strength of Composite Stiffened Panels with Large Transverse Notches

Enjuto, Patrick ; Walker, Thomas H ; Lobo, Mark ; Cregger, Eric ; Wanthal, Steven

关键词: AIRCRAFT DESIGN;    COMPOSITE STRUCTURES;    CURVATURE;    INTERFACIAL TENSION;    NOTCHES;    RESIDUAL STRENGTH;    STIFFENING;    CRACKS;    DAMAGE;    LOADS (FORCES);    PREDICTIONS;    REINFORCEMENT (STRUCTURES);   

RP-ID  :  NF1676L-27518

学科分类：复合材料

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Design of robust aircraft structure requires consideration of the load-carrying capability with large damage. Large notches, typically introduced as machined cracks (aka "notches") severing a single skin bay and a central stiffening member, are often used to conservatively address the wide range of possible large damage scenarios. The objective of the current effort was to develop more generalized and rapid analysis methods addressing large-notch residual strength of stiffened panels to support preliminary design activities..