Comparison of two test methods for bending small disks on an annular support

Goltsev, V.Y.; Grigoriev, E.G.; Osintsev, A.V.; Plotnikov, A.S.; Sedegov, A.S.

Авторы: Goltsev V.Yu, Grigoriev E.G., Osintsev A.V., Plotnikov A.S., Sedegov A.S.
Журнал: Journal of Physics: Conference Series
Том: 1431
Номер: 1
Год издания: 2020
Издательство: IOP Publishing
Местоположение издательства: [Bristol, UK], England
Первая страница: 012014
DOI: 10.1088/1742-6596/1431/1/012014
Аннотация: Two methods of bending thin disks on an annular support are compared. The methods differ in the type of loading indenter and the equations that determine the strength of the material by the test results. The end surfaces of the indenter are flat cylindrical (indentor 1) or spherical (indentor 2). The methods were used to test identical disc samples from model materials: cast iron and graphite, as well as aluminum oxide samples obtained by spark-plasma sintering. The results of testing 24 disks of model materials and 10 disks of aluminum oxide on the ring support are presented. Bending diagrams of 12 disks of each model material on the annular support using two types of indentors indicate their different tensile strength. The calculated values of strength and their spread were higher when using indenter 2 than when using indenter 1. Thus, comparative tests have shown that the calculated strength of the tested materials depends on the nature of the failure of the samples and the type of bending diagram. The most reasonable were the test results obtained with the use of a flat-tipped indenter, which coincide with the characteristics of the strength of materials and the minimum spread of values.
Добавил в систему: Плотников Александр Сергеевич

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