A method based on ASTME1012 to adjust the alignment of the material testing machine

Abstract

A method by using strain-gauged transducer to adjust the alignment of the materials testing machine is introduced in this paper. In order to improve the accuracy of the material test, the alignment of the material testing machine should be adjusted before tests. A transducer with three levels of strain gauges is applied before the specimens are tested. By calculating the bending stress according to the equation in ASTME1012,an adjustment suggestion to reduce the angular misalignment and concentric misalignment is given by the calculation results. Through adjusting the direction and position of the grips until the value of the strain gauges meet the requirement, the misalignment of the material testing machine will be removed.

Predicting Misalignments of the Material Test System through a Thick-flat Specimen by Machine Learning

“…The loading coaxiality has traditionally been considered one of the most critical factors affecting the precision of the testing system. The varying loading coaxiality leads to comprehensive data scatter in the mechanical properties of the materials, even when the same material is tested [1]. Forecasting misalignments in the uniaxial test system is, therefore, necessary to reduce the dispersion of test data.…”