Hygrothermal effects on adhesively-bonded CFRP-to-steel joints in mode I fracture

سال انتشار: 1402
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 84

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شناسه ملی سند علمی:

ISME31_211

تاریخ نمایه سازی: 10 خرداد 1402

چکیده مقاله:

Exposure to environmental stresses can weaken theconnection of epoxy-bonded CFRP-strengthened steelelements. As a result, designers often express concernabout possible premature delamination arising fromcombined peel and shear effects at the CFRP-steelinterface. This study was undertaken to further knowledgein relation to the peel failure of epoxy-bonded CFRP-tosteeljoints subjected to hygrothermal conditioning. Twocommercially available structural epoxy adhesives wereexamined. Hygrothermal conditioning may cause theadhesion failure near to the edges of the adhesive joints.The load-carrying capacity and strain energy release rateof adhesive joints depend on the adhesive andhygrothermal environment, and can be degraded up to۱۵%. Humid and wet conditioning cause up to ۴۴% and۶۳% drop in elastic modulus, ۳۱% and ۵۵% reduction intensile strength, and ۳۲% and ۴۴% increase in averagemaximum strain of adhesive materials, respectively. Anonlinear finite element analysis which employed acohesive zone model was conducted and showed that theproposed modified experimental arrangement wasdominated by mode I behaviour.

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نویسندگان

Milad Jabbari

Postdoctoral Research Fellow, University of Isfahan, Isfahan;

Gary M. Raftery

Senior Lecturer, University of Auckland, Auckland, New Zealand

James B.P Lim

Professor, University of Waikato, Hamilton, New Zealand