| 摘要 |
PROBLEM TO BE SOLVED: To provide a method which enables sectional stress of an expansion lock bolt to be measured by installing a strain gauge in the expansion lock bolt without causing damage to the strain gauge. SOLUTION: In this method for measuring the sectional stress of the expansion lock bolt, the strain gauges 2a and 2b are fixed in prescribed positions on a prescribed cross section of a rod-like member 1 by adjusting sensitivity to the axial direction, in such a manner that the sensitivity direction of the strain gauges 2a and 2b corresponds to the axial direction of the lock bolt 5; a rod-like strain detection unit is formed by providing an output member 3 for guiding electrical output, and is fixed to the inside of the lock bolt 5 by means of an injected solidification agent; the strain gauges 2a and 2b are subjected to strain by following expansion and contraction strain caused by the stress of the lock bolt 5; and an electric current corresponding to the strain occurring to the strain gauges 2a and 2b can be outputted, and the cross-sectional stress is measured by using the output. COPYRIGHT: (C)2005,JPO&NCIPI
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