Polymer Composites
Hygrothermal Aging and Failure Mechanism of Glass Fiber Reinforced Polyurethane Composite Frames for Offshore Applications
ABSTRACT The durability of glass fiber reinforced polyurethane (GFRPU) composites under harsh marine environments is critical for offshore photovoltaic applications. This paper investigates the hygrothermal aging behavior and failure mechanisms of GFRPU composites by pressure cooking test (PCT) at 121°C and 100% RH for up to 240 h. Moisture absorption increases linearly to 2.42% after 240 h without reaching saturation, deviating from Fickian behavior due to diffusion‐damage coupling. Mechanical properties show a tw …