Life predicting gauge for structure and life predicting method employing the same

摘要

The present invention is intended to facilitate prediction of the life of a structure, such as a frame of a dump truck and so forth without requiring cumbersome calculations. A gauge (2, 3 or 4) for predicting a life of a structure comprises a gauge main body of a thin plate form having annular ring portions (5, 6) of substantially the same configuration at both ends and a strip-like connecting portion (7) integrally connecting the annular ring portions and formed with V-shaped cut-outs (8, 8) at the intermediate portion in opposition to each other. The gauge main body has a shorter life than the life of the structure (1) to be predicted. A crack gauge is fitted between the mutually opposing cut-outs. The gauge is fixed on a predetermined position on the structure by way of welding or so forth. A breaking time of the gauge can be obtained from a variation of a measured resistance of the crack gauge. Based on the breaking period, the life of the structure (1) is predicted.