Double torsion tests for studying slow crack growth of portland cement mortar

M. Wecharatana; S. P. Shah

doi:10.1016/0008-8846(80)90011-3

Double torsion tests for studying slow crack growth of portland cement mortar

M. Wecharatana
, S. P. Shah

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

For studying slow crack growth in portland cement mortar 32″ (812.8 mm) long double torsion specimens were tested. During testing, the loading and reloading compliances, permanent (or inelastic) deformations and crack growth were measured. It was observed that the strain energy release rates calculated from elastic, secant or reloading compliances do not accurately represent the fracture behavior of this material. A modified definition of the strain energy release rate is developed here to include both the elastic and the inelastic strain energy absorbed during crack extension. For this method, in addition to the reloading compliance, the knowledge of the rate of change of permanent deformations with crack growth is necessary. Details of the analytical and experimental procedure are described in this paper.

Original language	English (US)
Pages (from-to)	833-844
Number of pages	12
Journal	Cement and Concrete Research
Volume	10
Issue number	6
DOIs	https://doi.org/10.1016/0008-8846(80)90011-3
State	Published - 1980
Externally published	Yes

All Science Journal Classification (ASJC) codes

Building and Construction
General Materials Science

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10.1016/0008-8846(80)90011-3

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title = "Double torsion tests for studying slow crack growth of portland cement mortar",

abstract = "For studying slow crack growth in portland cement mortar 32″ (812.8 mm) long double torsion specimens were tested. During testing, the loading and reloading compliances, permanent (or inelastic) deformations and crack growth were measured. It was observed that the strain energy release rates calculated from elastic, secant or reloading compliances do not accurately represent the fracture behavior of this material. A modified definition of the strain energy release rate is developed here to include both the elastic and the inelastic strain energy absorbed during crack extension. For this method, in addition to the reloading compliance, the knowledge of the rate of change of permanent deformations with crack growth is necessary. Details of the analytical and experimental procedure are described in this paper.",

author = "M. Wecharatana and Shah, \{S. P.\}",

note = "Funding Information: This research was supported by a grant from the National Science Foundation (ENG 77-23534) to the University of Illinois at Chicago Circle. The research grant is under the supervision of A. E. Naaman and S. P. Shah of the Department of Materials Engineering.",

year = "1980",

doi = "10.1016/0008-8846(80)90011-3",

language = "English (US)",

volume = "10",

pages = "833--844",

journal = "Cement and Concrete Research",

issn = "0008-8846",

publisher = "Elsevier Ltd",

number = "6",

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TY - JOUR

T1 - Double torsion tests for studying slow crack growth of portland cement mortar

AU - Wecharatana, M.

AU - Shah, S. P.

N1 - Funding Information: This research was supported by a grant from the National Science Foundation (ENG 77-23534) to the University of Illinois at Chicago Circle. The research grant is under the supervision of A. E. Naaman and S. P. Shah of the Department of Materials Engineering.

PY - 1980

Y1 - 1980

N2 - For studying slow crack growth in portland cement mortar 32″ (812.8 mm) long double torsion specimens were tested. During testing, the loading and reloading compliances, permanent (or inelastic) deformations and crack growth were measured. It was observed that the strain energy release rates calculated from elastic, secant or reloading compliances do not accurately represent the fracture behavior of this material. A modified definition of the strain energy release rate is developed here to include both the elastic and the inelastic strain energy absorbed during crack extension. For this method, in addition to the reloading compliance, the knowledge of the rate of change of permanent deformations with crack growth is necessary. Details of the analytical and experimental procedure are described in this paper.

AB - For studying slow crack growth in portland cement mortar 32″ (812.8 mm) long double torsion specimens were tested. During testing, the loading and reloading compliances, permanent (or inelastic) deformations and crack growth were measured. It was observed that the strain energy release rates calculated from elastic, secant or reloading compliances do not accurately represent the fracture behavior of this material. A modified definition of the strain energy release rate is developed here to include both the elastic and the inelastic strain energy absorbed during crack extension. For this method, in addition to the reloading compliance, the knowledge of the rate of change of permanent deformations with crack growth is necessary. Details of the analytical and experimental procedure are described in this paper.

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U2 - 10.1016/0008-8846(80)90011-3

DO - 10.1016/0008-8846(80)90011-3

M3 - Article

AN - SCOPUS:0019079986

SN - 0008-8846

VL - 10

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JO - Cement and Concrete Research

JF - Cement and Concrete Research

IS - 6

ER -

Double torsion tests for studying slow crack growth of portland cement mortar

Abstract

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