Determining the displacement field in a circular semi ring marble specimen with the aid of the digital image correlation technique. Issue 3 (6th March 2020)

• Record Type: Journal Article
• Authors: Pasiou, Ermioni D.
• Is Part Of: Material design & processing communications. Volume 3:Issue 3(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-03-06
• Subjects: Brazilian disc test -- circular semi ring -- crack propagation -- diametral compression -- digital image correlation -- Dionysos marble -- displacement field; Materials -- Research -- Periodicals; Materials -- Design -- Periodicals; Materials -- Research; Materials -- Design; Electronic journals; Periodicals; 620.11
• DOI: 10.1002/mdp2.167
• Languages: English
• ISSNs: 2577-5476

Abstract

Abstract: An experimental protocol is here described aiming to determine the displacement field developed in a circular semi ring (CSR) specimen, made of Dionysos marble, when it is subjected to diametral compression. The specific test has been recently proposed as an alternative of the familiar Brazilian disc test for the determination of the tensile strength of brittle materials. The displacements were determined by means of the digital image correlation (DIC) technique, which permitted, also, recording the crack propagation trajectory. Attention is paid exclusively at the central part of the specimen (where fracture is expected), in order to decrease the size of the optical window and thus to increase the resolution of the sensing system used. This was considered necessary taking into account the extreme brittleness of Dionysos marble and the very small values expected for the components of the displacement field. The experimentally obtained displacements were compared against the ones of a recently introduced analytic solution for the CSR under diametral compression. Their agreement was satisfactory.