Crack propagation testing device and method

• Main Authors: LIU MANGXIAN, LEI YUZHE, REN LI, FU HAILIANG, YAN ZHIPENG, LI YUEXUE, ZHANG XUN, LI PENGFEI
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2024
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a crack propagation testing device and method. The crack propagation testing device comprises a crack propagation meter, a parallel resistor R1, a series resistor R2 and a strain gauge, the crack growth meter is connected with the strain gauge in a 1/4 bridge mode, the series resistor R2 is connected between the crack growth meter and the strain gauge in series, and the parallel resistor R1 is connected to the two ends of the crack growth meter in parallel. The device can amplify signals, ensures that signal output is still kept after the crack propagation meter wire grid is completely broken, can test the crack propagation meter by using an existing strain measuring instrument on site, and saves equipment cost. 本发明公开了一种裂纹扩展测试装置及方法，包括裂纹扩展计、并联电阻R1、串联电阻R2和应变仪；裂纹扩展计以1/4桥方式与应变仪连接，串联电阻R2串联在裂纹扩展计和应变仪之间，并联电阻R1并联在裂纹扩展计两端。能够放大信号，保证裂纹扩展计丝栅全部断裂后仍然保持信号输出，可利用现场已有的应变测量仪器对裂纹扩展计进行测试，节约设备成本。