Micromechanical analysis of the kink-band performance at the interface of a thermoplastic composite under tensile deformation
✍ Scribed by P.I. Gonzalez-Chi; E.A. Flores-Johnson; J.G. Carrillo-Baeza; R.J. Young
- Publisher
- Society for Plastic Engineers
- Year
- 2010
- Tongue
- English
- Weight
- 324 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0272-8397
- DOI
- 10.1002/pc.20973
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✦ Synopsis
Abstract
The manufacture of thermoplastic composites normally involves compression molding that generates fiber dislocations known as kink‐bands, which create stress concentrations able to cause the premature compression failure of a composite; nevertheless, the kink‐band influence over the interfacial performance or failure of a composite tested under tension is not fully understood. This work uses Raman spectroscopy as a tool to map the axial stress distribution around a kink‐band in an aramid/low density polyethylene single fiber composite. The stress distribution along the fiber was fitted to a generalized shear‐lag model to calculate the interfacial shear stress; its maximum was found around the kink‐band where the fiber interface was still bonded to the matrix, defining a localized stress concentration. POLYM. COMPOS., 31:1817–1817, 2010. © 2010 Society of Plastics Engineers.