碳纤维复合材料雷击损伤的瞬态红外热成像检测

通过雷电模拟,对复合材料层合板试样进行雷击损伤试验。基于热扩散原理,针对不同的雷击试验件,采用波形为长脉冲形式的瞬态热激励方式对雷击损伤进行红外热成像检测,并对不同时刻的检测结果进行分析、比较,对缺陷轮廓进行界定,对结果进行定量测量。检测结果表明,无论是否对碳纤维复合材料表面进行防护,瞬态红外热成像方法均能够有效检测出雷击后的内部分层损伤,可对损伤的严重程度进行有效区分,能够对缺陷尺寸、面积进行准确测量。

Investigation of Transient Thermography Method for Testing Lightning Strike Damage of Carbon Fiber Composite

The lightning impulse test is carried out on carbon fiber composite laminated board for simulating thun-derstroke damage. The transient thermography test method is implemented for detecting the damage defect of different sample, which is a new test method for using the long pulse as a thermal excitation resource. The results of different time is analysed, compared, the outline of the defect is draw, and the size is measured. The research achievement shows that the transient thermography method can detect the delamination defect inside the composite exactly. The transient thermography can differentiate the severity of damage and failure. The measurement result of size and area is correct.