Effect of interactions of two holes on tensile behavior of patch repaired carbon/epoxy woven laminates  

作　　者：Gursahib Singh Bhatia Arockiarajan A. 

机构地区：[1]Department of Applied Mechanics,Indian Institute of Technology Madras,600036,Chennai,India

出　　处：《Defence Technology（防务技术）》2023年第3期88-93,共6页Defence Technology

基　　金：the financial support by the Council of Scientific&Industrial Research (CSIR)-Research Scheme (22/0809/2019-EMR-Ⅱ)

摘　　要：The conventional case of patch repair involves bonding a patch over single damage/hole in the laminate.This work investigates the effect of interaction of two holes on the tensile behavior patch repaired carbon epoxy woven laminates.The specimens of[0°/45°/45°/0°]laminates were repaired with adhesively bonded two-ply[45°]2external patches.Three different cases of drilled specimens were produced with different hole arrangements viz.specimens with single central hole(SH),with two holes aligned along the longitudinal axis(LH)and with two holes along transverse axis(TH).The two-hole specimens were repaired with two different types,i.e.single large patches(SP)and with the two smaller patches(DP)of combined bonding area equal to the single large patches.Digital image correlation(DIC)was employed to capture strain contours.The results reveal the difference in the load transfer through the patches depending upon the arrangement of holes.The TH repaired specimen exhibit significant load recovery(SP-32.75%,DP-34.62%)while the LH specimens result in very marginal(SP-6.11%,DP-4.10%)recovery compared to their drilled case.The TH specimen failed by crack growing through both the holes beneath the patch,while the LH specimens failed by the failure through only one hole.The use of single large patch over multiple holes and multiple small patches individually over each hole has no significant influence on load recovery.

关 键 词：CRACK PATCH behavior 

分 类 号：TB33[一般工业技术—材料科学与工程]