A MATHEMATICAL MODEL FOR THE FAILURE OF CEMENT PASTE AND MORTARS
IT IS SUGGESTED THAT STRUCTURAL MODELS HAVE ONLY A LIMITED USE IN A STUDY OF FAILURE AND AN ALTERNATIVE MATHEMATICAL MODEL IS PROPOSED WHICH BEHAVES, IN MANY WAYS, LIKE HARDENED CEMENT PASTE OR MORTAR. THE MODEL IS SIMILAR TO VOLKOVS NORMAL MICRO-INHOMOGENEOUS MATERIAL, THE MAJOR DIFFERENCE BEING IN THE FAILURE CRITERIA USED AT THE MICROSCOPIS LEVEL. THE BEHAVIOR OF THE MODEL MATERIAL IN SIMPLE TENSION IS STUDIED AND IT IS SHOWN THAT PROGRESSIVE FRACTURE, OR MICRO- CRACKING, OCCURS DURING ALL STAGES OF LOADING. THE MODE OF FAILURE DEPENDS UPON THE METHOD OF TEST BECAUSE EITHER THE MATERIAL FAILS WHEN THE MAXIMUM STRESS IS REACHED OR PROGRESSIVE FRACTURE CONTINUES WITH INCREASED DEFORMATION AND A REDUCTION IN APPLIED STRESS. IN ADDITION, A DUCTILE MODE OF FAILURE IS INVESTIGATED AND IT APPEARS THAT, IN CONTRAST TO BRITTLE FRACTURE, THE ULTIMATE STRENGTH MAY BE ALMOST UNAFFECTED BY MICRO-INHOMOGENEITY. /AUTHOR/
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Supplemental Notes:
- Vol 19, No 60, PP 135-142
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Authors:
- Dougill, J W
- Publication Date: 1967-9
Media Info
- Serial:
Subject/Index Terms
- TRT Terms: Cement mortars; Deformation; Ductility; Failure; Fracture mechanics; Heterogeneity; Mathematical models; Pastes; Samples; Stresses
- Old TRIS Terms: Progressive failure
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00212539
- Record Type: Publication
- Files: TRIS
- Created Date: Jan 24 1994 12:00AM