层压板小质量物体冲击下接触力测量与损伤响应
发布时间：2019-01-28 23:28
【摘要】：为了发展复合材料层压板在小质量物体冲击下损伤性能的测试技术,研发了小质量冲击试验机,可模拟自由状态小质量物体产生的冲击,冲击能量可调节,冲击点挠度可测量。通过冲击头加速度和冲击点挠度测量接触力,结果显示,加速度传感器谐振会明显干扰测量信号。采用滤波技术后,冲击头的加速度响应可以有效地测量冲击接触力。用冲击点挠度计算接触力,结果也与试验结果吻合。对层压板进行多个能量下的冲击试验,发现产生明显分层损伤时,由加速度传感器测得的接触力在特定值处明显下降,随后可能继续升高;由冲击点挠度得到的接触力斜率发生变化,这可作为小质量冲击分层阈值力的识别方法。
[Abstract]:In order to develop the testing technology of the damage performance of composite laminates under the impact of small mass objects, a small mass impact testing machine was developed, which can simulate the impact produced by small mass objects in free state. The impact energy can be adjusted and the deflection of impact point can be measured. The contact force is measured by the acceleration of the shock head and the deflection of the impact point. The results show that the resonance of the acceleration sensor will obviously interfere with the measured signal. The acceleration response of the shock head can effectively measure the impact contact force. The contact force is calculated by the deflection of the impact point, and the results are in agreement with the experimental results. The impact tests on laminated plates at multiple energies show that the contact force measured by the acceleration sensor decreases obviously at a specific value and may continue to increase when obvious delamination damage occurs. The slope of the contact force obtained from the deflection of the impact point changes, which can be used as a method to identify the threshold force of the delamination of small mass impact.
【作者单位】： 上海交通大学航空航天学院;
【基金】：国家自然科学基金(11372192) 上海市自然科学基金(13ZR1422200)资助
【分类号】：TB332
，
本文编号：2417416
[Abstract]:In order to develop the testing technology of the damage performance of composite laminates under the impact of small mass objects, a small mass impact testing machine was developed, which can simulate the impact produced by small mass objects in free state. The impact energy can be adjusted and the deflection of impact point can be measured. The contact force is measured by the acceleration of the shock head and the deflection of the impact point. The results show that the resonance of the acceleration sensor will obviously interfere with the measured signal. The acceleration response of the shock head can effectively measure the impact contact force. The contact force is calculated by the deflection of the impact point, and the results are in agreement with the experimental results. The impact tests on laminated plates at multiple energies show that the contact force measured by the acceleration sensor decreases obviously at a specific value and may continue to increase when obvious delamination damage occurs. The slope of the contact force obtained from the deflection of the impact point changes, which can be used as a method to identify the threshold force of the delamination of small mass impact.
【作者单位】： 上海交通大学航空航天学院;
【基金】：国家自然科学基金(11372192) 上海市自然科学基金(13ZR1422200)资助
【分类号】：TB332
，
本文编号：2417416
本文链接：https://www.wllwen.com/kejilunwen/cailiaohuaxuelunwen/2417416.html
