RATE-SENSITIVITY OF MODE I AND MODE II FRACTURE OF CONCRETE.

Surendra P Shah*, Reji John

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Single edge notched beams were subjected to varying rates of loading, to establish the mode I Stress Intensity Factor, K//I vs. Crack Velocity, V, relationship for mortar and concrete. Impact tests were conducted using a Modified Instrumented Charpy Impact Test System. The rate of crack growth was obtained using brittle 'Krak Gages'. Mode I test results lead to the following conclusions. (1) Slow (prepeak) crack growth for concrete is larger than that of mortar, at a given strain rate. (2) Pre-peak crack growth decreases with increase in strain-rate. This could be the reason for decrease in pre-peak non-linearity at higher strain rates. Hence LEFM approach may be valid at high rates of loading. (3) log K//I - log V relationship is non-linear especially at the higher rates of loading.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposia Proceedings
PublisherMaterials Research Soc
Pages21-37
Number of pages17
Volume64
ISBN (Print)0931837294
StatePublished - Dec 1 1986

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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