T700/LT-03A层合板在不同环境下的拉伸性能研究

在室温、低温和湿热三种环境下,对碳纤维层合板分别开展了静力和拉-拉疲劳试验。得到了T700/LT-03A层合板的拉伸性能和破坏机理。在抗拉强度和抗疲劳性能方面,室温环境优于其它两种环境。试验和模拟结果表明:T700/LT-03A层合板在三种环境下的应力结果较为接近;与室温环境下的结果相比,低温和湿热环境下层合板的应力分别减少了3.37%和4.3%,而湿热环境下层合板的应力增大了5.69%。环境对该层合板的疲劳性能影响较大。研究成果对碳纤维复合材料的工程应用提供一定的参考。

Tensile Properties of T700/LT-03A Laminates Under Different Environments

The tensile properties and fatigue behavior of carbon fiber reinforced composite laminates were tested at different temperatures in tensile and tension–tension fatigue process. The tensile properties and failure mechanism of T700/LT-03A laminates were obtained by this way. Through comparing the tensile properties at three different temperatures, it was obtained that the tensile properties at room temperature was higher than those at other temperatures. The results showed that the static strength of T700/LT-03A laminates under the three kinds of temperature was not obviously changed, and the static strength at low temperature was reduced by 3.37% compared with at room temperature, and the static strength in hot and humid environment was reduced by 4.3% compared with that at room temperature. Compared with the ambient temperature, the stress value of the hot and humid environment was increased by 5.69%, and the stress value had a great influence on the number of fatigue cycles. The paper can provide some reference for application of carbon fiber composites in the future.