碳纤维增强复合材料层压板低速冲击损伤的脉冲红外热像检测

Inspection of Low Speed Impact Damage of CFRP with Pulsed and Lock-in Thermography

碳纤维复合材料具有高比强度,在航空航天领域内得到越来越广泛的应用。对五种不同冲击能量下的碳纤维增强复合材料层压板进行了脉冲式红外热像检测。利用外加的瞬时或交变温场,用红外热像仪记录了试件在外加温场下的表面温度变化。将采集到的数据信号根据外加热类型进行了处理,处理结果以图像或图像序列形式显示,并用超声C扫描方法对检测结果进行了验证。

Carbon fiber reinforced plate（CFRP） was widely used in aero industry for its high strength and low weight. CFRP plates with five different impact energies were inspected by pulse thermography. With transient or modulated temperature field applied on object sample, surface temperature variation was recorded by infrared camera. After acquisition, the data was processed according to corresponding heating type and the results were given as graphs. Ultrasonic C-scan was used as validation.