Abstract
Abstract A three-phase concentric cylinder model is used to estimate moisture-induced internal stress in unidirectional polymer composite. It is found that moisture-induced tensile stress on the fiber is substantial when absorbed moisture level in the polymer matrix is high. It is also shown that the stress-state of the fiber is not significantly changed by inclusion of an interphase layer with properties similar to the matrix. The consequence of moisture-induced internal stress is that glass fibers are subjected to stress corrosion, even under no externally applied stress. It is found, by measuring the size of the fracture mirrors of failed glass fibers in model composites, that the in situ tensile strength of E-glass fibers in an epoxy matrix composite was degraded at a faster rate compared to the case of stress-free aging of glass fibers. Thus it is concluded that moisture-induced tensile stress in glass fibers plays an important role in strength degradation of unidirectional composite under environmental aging.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
