Elastic modulus measurement—obtaining reliable data from the tensile test

Abstract

Elastic modulus is an intrinsic material property and a key parameter in engineering design and materials development. A wide range of test methods is available for measuring modulus, but there is currently some uncertainty within parts of the user community about the reliability of modulus data, particularly from the tensile test, to the extent that many use standard handbook values in their calculations and designs. This is not recommended and can be addressed through good experimental practice and careful measurement.The paper discusses some of the key practical issues associated with the tensile test that need to be considered to obtain reliable values for Young's modulus such as strain measurement, alignment, data analysis methods, software validation, uncertainty budgets and the use of reference materials.

Strength enhancements in cold-formed structural sections — Part I: Material testing

“…A comprehensive review, covering the key practical issues associated with tensile testing and data analysis methods for the accurate determination of the Young's modulus, has been carried out by Roebuck et al [30] and Lord and Morrell [31]. Method of strain measurement, misalignment and bending of the tensile coupon specimens as well as the data analysis technique employed, have been highlighted as having a potentially significant effect on the accuracy of the measured Young's modulus values.…”

Thermo-mechanical properties of mixed-matrix membranes encompassing zeolitic imidazolate framework-90 and polyvinylidine difluoride: ZIF-90/PVDF nanocomposites

“…% loading of the ZIF-90 nanoparticles. Here it is worth noting that this stiffness value is likely to be underestimated from the tensile test (which is a well-known issue), 36 thus in Fig. 4 we applied nanoindentation to better characterize the elastic stiffness property.…”

Determining elastic modulus of the material by measuring the deflection of the beam loaded in bending

“…This paper presents a theoretical model and design solution for the device that determines the modulus of elasticity by bending the material (test samples), instead of the usual stretching [17]. The measurement of the elastic modulus was performed and measurement errors, i.e.…”