The Effect of Fiber Surface Morphology on the Microscopic Damage Behavior in CFRP Laminates

Abstract

Transverse strength of CFRP is very influenced by the fiber/matrix interfacial tensile strength, which is modified with physical anchor effect in irregular fiber surface. The objective of the present study is to clarify the effect of fiber surface morphology on the transverse strength and transverse cracking behavior in CFRP laminates. Tensile tests were conducted on [9010] and [03/903]s laminates with two types of carbon fiber, TR50S and TR40. TR 50S and TR40 have irregular and smooth fiber surface, respectively. Experimental results show that transverse strength is larger in laminates with TR 50 S. Transverse cracking is also suppressed in the laminates with TR50S. These results proves the high fiber/matrix tensile strength with TR50S.