On the Theory of the Indentation Test for the Measurement of Tensile Strength of Brittle Materials
A theoretical solution has been obtained for the state of stress in a rectangular plate under a pair of symmetrically placed rigid indenters. The stress distributions along the two central axes have been calculated for a square plate assuming the pressure distribution under the indenters as uniform, parabolic and one resulting from `constant displacement' on a semiinfinite boundary, for different ratios of indenter-width to side of square. The results are compared with those of photoelastic analysis of Berenbaum and Brodie and the validity of the solution is discussed. The solution has been extended to orthotropic materials and numerical results for one type of coal are given.
K. T. Sundara Raja Iyengar and K. Chandrashekhara, "On the Theory of the Indentation Test for the Measurement of Tensile Strength of Brittle Materials," British Journal of Applied Physics, Institute of Physics - IOP Publishing, Jan 1962.
The definitive version is available at https://doi.org/10.1088/0508-3443/13/10/309
Mechanical and Aerospace Engineering
Article - Journal
© 1962 Institute of Physics - IOP Publishing, All rights reserved.