Determination of the material elasticity modulus in bending

Goltsev, V.Y.; Osintsev, A.V.; Plotnikov, A.S.

Авторы: Goltsev V.Yu, Osintsev A.V., Plotnikov A.S.
Журнал: Letters on materials
Том: 7
Номер: 2
Год издания: 2017
Первая страница: 91
Последняя страница: 95
DOI: 10.22226/2410-3535-2017-2-91-95
Аннотация: The beam bend theory allows calculation of material elasticity modulus (EM) based on the ratio of distance between the supports to the height of the sample cross-section (l/h) and the values of specimen points displacements induced by load. We used computational and experimental approaches to define the range of l/h allowing correct EM calculation. In computer simulations performed in ANSYS Mechanical 16.2 at a given EM and at a range of l/h vertical displacements at six points along the external side of the sample in sections under the load and above the support beams were predicted. These displacements were used to re-compute the EM using the formulas of the beam bend theory. Similar measurements were performed in experiment for steel and graphite samples. Specifically, samples were loaded under the scheme of three-point bending and the measurements of the displacements on the surface of the sample were obtained by digital image correlation method. Accordingly, the EM was computed using the beam bend theory method. No relation between the strength characteristics of the investigated materials (as determined during the bending test) and the l/h was found. Yet a good agreement between the EM values obtained by modeling and experimental approach was observed. The effect of l/h on the accuracy of the EM calculation was estimated. Significant correlation between the EM obtained in this study (both by modeling and experiment) and its known values for the examined materials was obtained when l/h > 7.
Добавил в систему: Плотников Александр Сергеевич

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