Failure analysis of GFRP single lap joints tailored with a combination of tough epoxy and hyperelastic adhesives

被引：22

作者：

Srinivasan, D. V. ^{[1
]}

Ravichandran, V. ^{[1
]}

Idapalapati, S. ^{[1
,2
]}

机构：

[1] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Rolls Royce NTU Corp Lab, Singapore 639798, Singapore

[2] Energy Res Inst NTU, 1 CleanTech Loop, Singapore 637141, Singapore

来源：

COMPOSITES PART B-ENGINEERING | 2020年 / 200卷

关键词：

Tailoring; Adhesion; Strength; Finite element analysis; Joints; BONDED JOINTS; COMPOSITE ADHERENDS; STRENGTH; BEHAVIOR;

D O I：

10.1016/j.compositesb.2020.108255

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fibre reinforced polymeric composites bonded with epoxy adhesives often fail ungraciously, manifesting fibre-tear failure due to the edge peel stresses. This research work proposes phenol formaldehyde-based hyperelastic adhesive (AF32), as a compliant adhesive for tailoring the single lap joints consisting of GFRP adherends and well-toughened epoxy adhesive (AF3109 and EA9696) joints. The failure strength of the AF3109 and EA9696 adhesive joints is increased by 51.64% and 24.25%, respectively by having 20% volume of compliant adhesive in the bond line. Finite element simulations with Exponential Drucker-Prager (EDP) and Marlow strain energy models are carried out to simulate the experimental load-displacement response. Different failure mechanisms and the influence of adhesive intermingling are revealed by the failure analysis. Finally, a failure mode map for the tailored adhesive joints is proposed in terms of normalised strength ratio and the normalised volume of the compliant adhesive.

引用

页数：11

共 36 条

[1] STRENGTH PREDICTIONS FOR LAP JOINTS, ESPECIALLY WITH COMPOSITE ADHERENDS - A REVIEW [J].