采用复合材料电热实验平台,测试碳纤维树脂基复合材料(Carbon Fiber Reinforced Polymer,CFRP)电热作用下温度场变化规律,同时从单丝拉伸断裂界面剪切强度、短梁剪切性能变化和剪切断口等多方面揭示电热作用对CFRP力学性能的影响机制。结果表明：电热作用会使 CFRP 整体温度迅速升高,在约4 min时达到稳态温度,随着电流强度的增大,CFRP层板表面温度越高,当电流强度为8 A(0.44 A/mm2)时,CFRP 的表面温度达到151℃；单丝拉伸和短梁剪切界面强度都随着电流强度增加呈现先增加后降低的趋势；小电流时,电热作用产生较少的焦耳热,优化界面性能,提高界面剪切强度,大电流时,电热作用产生的焦耳热过大,对界面产生烧蚀等不可逆损伤,降低了界面结合性能。
Temperature field variation rule of carbon fiber reinforced polymer (CFRP)was tested by using electric thermal experimental platform for composites,while revealing the influence mechanism of electric thermal effect on the mechanical properties of CFRP from the interfacial shear strength of monofilament tensile fracture,the short beam shear property and shear fracture etc.The results show that electric thermal effect can increase the overall tem-perature of CFRP,and reach steady state temperature at about 4 min.CFRP laminate surface temperature is higher with increasing of the current strength,CFRP’s surface temperature reaches 1 5 1 ℃ when the current strength is 8 A (0.44 A/mm2 );the monofilament tensile and short beam shear strength of the interface with the increasing current strength increase at first and then decrease;when at a low current,the electric thermal effect generates less Joule heat,which can optimize the interface property to improve the interfacial shear strength,when at a high cur-rent,the electric thermal effect’s Joule heat is much higher,which can produce the irreversible damage such as abla-tion on interface and reduce the interfacial bonding property.
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