碳纤维复合材料缺陷的超声检测及材料力学性能仿真研究

碳纤维复合材料内部结构的健康程度将直接影响到零部件的整体性能.采用高频超声衰减法对碳纤维复合材料进行内部无损检测.在超声波频率为30 MHz、探头距离工件表面1 cm、等离子水介质条件下,通过超声C扫描、X扫描,分析和确定内部缺陷位置及形状,并通过剖切试样,采用光学显微形貌表征对内部缺陷进行确证.采用ABAQUS对层间...

Ultrasonic Detection of Defects and Simulation of Mechanical Properties for Carbon Fiber Composites

The quality of the internal structure of the carbon fiber composite material will directly affect the overall performance of the parts.High-frequency ultrasonic attenuation method is used for internal non-destructive testing of carbon fiber composite materials.Under the conditions of an ultrasonic frequency of 30 MHz,a probe distance of 1 cm from the surface of the workpiece and a plasma water medium,the position and shape of internal defects are analyzed and defined by ultrasonic C-scan and X-scan,and the internal defects are confirmed by cutting the sample and through optical microscopic morphology characterization.ABAQUS is applied to simulate the influence of the mechanical properties of the interlayer defects.The results show that different defect sizes and temperature conditions have different influence laws on the fracture strength of the material.