What temperature thresholds cause composite delamination?

Composite delamination occurs when layers of a composite material separate due to thermal stress, often caused by exposure to extreme temperatures. The temperature thresholds that trigger delamination vary depending on the material composition, but typically range between 150°C to 300°C for many polymer-based composites. At these temperatures, the resin matrix softens, reducing its ability to bond the reinforcing fibers, leading to layer separation. Prolonged exposure to high temperatures can exacerbate this issue, causing irreversible damage. Understanding these thresholds is crucial for designing composites that withstand thermal stress and maintain structural integrity in demanding environments.