Mixed-mode IIII Interlaminar Fracture of CFIPEI Composite Material

Failures in composite materials occur mainly due to inierlamuuir fracture,also called delamination; between laminates. this indicates that characicrizinqiuterlamituir [raciure toughness is the most effective factor in the [ro.cture ofcomposite materials. this shtdy reports inuestiqaiion. on mixed-mode interlaminar[raciurc behaviour ui woven carbon .fibrelpolyetherimide (cfipei)thermoplastic composite material based on experimentol and numerical analyses.experinienis 11jc1'e conducted using the special test loading device. by1h1ryiny the loading anyle.o [rotn (}() to 9(1'. vute mode-1, pure mode-il anda widcmnge of mixed-triode data 'wctf obtained experimentally. usitu; thefinite-element results, geometrical [actors 1iie1'e applied to the specimen. basedon e:r:pe1'imentally measured critical loads, mixed-mode iiiterlaminar [raciuretoughness fot the composite under consideration deterttiitied. the [racturesurfaces wen: examined by scanninq electron rnicroscopu to gain insight intothe failure responses.