کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
770435 | 1463094 | 2015 | 20 صفحه PDF | دانلود رایگان |
• Determined the mixed-mode fracture toughness of a co-cured and two secondary bonded joint systems.
• Investigated the differences in fracture behaviour between co-cured and secondary bonded joints.
• Demonstrated role of scrim cloth in fracture behaviour of FM300-2M film adhesive.
• Attributed R-curve behaviour and increased toughness during mode II fracture to an evolving damage zone.
In the present study, the mixed-mode fracture toughness of three composite joint systems (2 secondary bonded and 1 co-cured) was investigated. The two secondary bonded systems predominantly resulted in cohesive failure with occasional interlaminar failure during mixed-mode loading while the co-cured system failed adhesively. This was attributed to moisture stored in the prepreg being released during the co-cure process.The mode II toughness was consistently 5–6 times that of the corresponding mode I case for each system. The increased toughness was due to a combination of an increased fracture surface area and a larger damage zone.
Journal: Engineering Fracture Mechanics - Volume 134, January 2015, Pages 148–167