Some new aspects on the diametral point load testing

M. Serati, H. Masoumi, D. J. Williams, H. Alehossein, H. Roshan

Research output: Contribution to conferencePaper

8 Citations (Scopus)


A new closed-form equation is presented to measure the tensile strength of rock based on point load strength index. The validity of the proposed equation is further examined experimentally through a set of diametral point load testing of monzonites and two different types of granite having various slenderness (length to diameter) ratio. Based on the results, it is concluded that the induced tensile stress at the centre of a diametral point load specimen as well as the point load strength index are a function of both Poisson's ratio and sample length. In general, when either Poisson's ratio or the length of the sample increases, the induced tensile stress decreases. However, results indicate that the gradient of the induced tensile stress is more sensitive to the sample length than the materials Poisson's ratio. The proposed formula successfully explains such behaviors and provides estimations that are in good agreement with the experimental data.

Original languageEnglish
Publication statusPublished - 1 Jan 2018
EventUS Rock Mechanics / Geomechanics Symposium 2018 - Seattle, United States of America
Duration: 17 Jun 201820 Jun 2018
Conference number: 52nd


ConferenceUS Rock Mechanics / Geomechanics Symposium 2018
Country/TerritoryUnited States of America

Cite this