首页> 外文会议>3rd International Workshop on Structural Health Monitoring, Sep 12-14, 2001, Stanford University >Stress Corrosion Damage Detection in Bolts by Stress Wave Attenuation
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Stress Corrosion Damage Detection in Bolts by Stress Wave Attenuation

机译:通过应力波衰减检测螺栓的应力腐蚀损伤

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Preliminary work has shown that damage in a short round bar can be quantified by determining the attenuation of a propagating stress wave. A bar provides a waveguide for the stress wave to travel and has a simple geometry. A shoulder or other geometric feature will reflect the excitation, which would change the recorded response. To extend this work, piezoelectric patches were attached to bolts, which were then exposed to a hostile environment and stress corrosion crack growth was allowed to take place in the material. Immediately after exposure, these bolts were pulled to failure in a tensile test machine, to determine their residual strength. A relationship between the signal attenuation and residual strength was obtained.
机译:初步工作表明,可以通过确定传播的应力波的衰减来量化短圆棒中的损坏。杆提供了用于应力波传播的波导,并且具有简单的几何形状。肩部或其他几何特征将反映激励,这将改变记录的响应。为了扩展这项工作,将压电片连接到螺栓上,然后将其暴露在恶劣的环境中,并允许材料中发生应力腐蚀裂纹。暴露后,立即将这些螺栓在拉伸试验机中拉出故障,以确定其残余强度。获得了信号衰减与残余强度之间的关系。

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