Influence of Trepanning Technology on the Accuracy of Residual Stress Measurement Using the Deep-hole Drilling Method

doi:10.3901/JME.2020.22.038

Abstract

Abstract: The deep-hole drilling method is a high accuracy, low destruction and easy operation technology in three-dimensional residual stress measurements. Compared with neutron diffraction method, the cost of measurement is lower, and it is attracting more and more attention. In order to improve the measurement accuracy of this method in high and complex stress field, and also optimize the measurement process, a circumferential hole-trepanning technology is investigated since the stress range can be accurately measured using the axial hole-trepanning technology is limited. Taking the low alloy steel Q345 as the research object, two different calculation models of hole-trepanning technologies are established using finite element method, and then the error distributions between simulated and actual values of two kinds of hole-trepanning technologies under different stress states are compared and analyzed. The investigated results show that both methods are suitable for the accurate measurement of elastic stress field, but when the stress is large (over 50% yield strength), the stress calculation result obtained by using the circumferential hole-trepanning technology is more accurate and the stress distribution in depth direction is better.

Key words: deep-hole drilling method, residual stress, numerical simulation, trepanning technology, measurement accuracy

CLC Number:

TG404

ZHAO Meijuan, CHEN Jing, CHEN Huaining. Influence of Trepanning Technology on the Accuracy of Residual Stress Measurement Using the Deep-hole Drilling Method[J]. Journal of Mechanical Engineering, 2020, 56(22): 38-45.

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