Stress history estimation of machine structure (A procedure for generating stress estimation equation using simulation and response surface)

Abstract

In this paper, we propose the method of estimating the stress history from the measured state quantity data from operating machine by creating a stress estimation equation for each evaluation point. We also report how to create the stress estimation equation. We are able to estimate the stress history throughout the machine structure. To accurately verify the stress estimation equation, we performed excavation with actual machine and measured the quantity of state and the stress. We calculated the estimated stress history by using the measured data. As a result of comparing the estimated value with the measured value, the accuracy of estimation was good in the defined region of stress estimation equation.

Keywords

• stress history
• response surface
• structural health monitoring
• construction machine