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

Surendra P Shah; Reji John

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

Surendra P Shah^*, Reji John

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	Materials Research Society Symposia Proceedings
Publisher	Materials Research Soc
Pages	21-37
Number of pages	17
Volume	64
ISBN (Print)	0931837294
State	Published - Dec 1 1986

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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title = "RATE-SENSITIVITY OF MODE I AND MODE II FRACTURE OF CONCRETE.",

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.",

author = "Shah, {Surendra P} and Reji John",

year = "1986",

month = dec,

day = "1",

language = "English (US)",

isbn = "0931837294",

volume = "64",

pages = "21--37",

booktitle = "Materials Research Society Symposia Proceedings",

publisher = "Materials Research Soc",

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T1 - RATE-SENSITIVITY OF MODE I AND MODE II FRACTURE OF CONCRETE.

AU - Shah, Surendra P

AU - John, Reji

PY - 1986/12/1

Y1 - 1986/12/1

N2 - 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.

AB - 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.

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