The interlaminar peformance of composites palys an important role in the damage process MBFU Ballast of fiber reinforced composites.In-situ monitoring by an embedded sensor could avoid the sudden failure.This paper investigates the in-situ monitoring of mode I interlaminar crack propagationg behavior in woven glass fiber reinforced epoxy (WGF/epoxy) composite laminates.
The resistance signal of multi-walled carbon nanotube (MWCNT) located in the mid-thickness of WGF/epoxy during the double cantilever beam (DCB) test is recorded.Relationship between the relative resistance and the interlaminar crack length is theoretically built and experimentally verified.Results show that the mode I crack propagating length can be successfully predicted by the relative resistance.
A linear relationship between the interlaminar crack propagating length Condiments and the total relative resistance is found by the experimental and theoretical results.