- Title
- J -integral as a useful fracture parameter for analysis of desiccation cracking in clayey soils
- Creator
- Costa, Susanga; Kodikara, Jayantha; Xue, Jianfeng
- Date
- 2013
- Type
- Text; Conference paper
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/163334
- Identifier
- vital:12797
- Abstract
- Fracture behaviour of clay soils during desiccation is an important area in soil mechanics that needs further development. The current approach is to use Linear Elastic Fracture Mechanic parameters, such as fracture energy and fracture toughness, measured from load tests for analysis and modelling of crack propagation. However, the importance of taking plasticity of the material into consideration has been highlighted by several researchers. This is especially true for soft and/or slurry clay. The recently developed double ring test is the only test available up to date which enables determination of Elasto-Plastic Fracture Mechanic parameter, J-integral. This is an important parameter, which accounts for the change in potential energy with fracture propagation. Currently, there is no data for J-integral in literature as applicable to desiccation cracking. This paper fills the said gap by presenting a set of J-integral data for Churchill clay and Kaoline clay measured from the double ring test. Values have been calculated for both slurry and compacted clay with corresponding coefficients of linear shrinkage. The challenging task of calculating strains and stresses has been dealt with the use of an image analysis technique. In addition, the path independence for J-integral calculation and the behaviour of J-integral with the moisture content are also discussed.
- Relation
- International Symposium on Coupled Phenomena in Environmental Geotechnics: From Theoretical and Experimental Research to Practical Applications p. 377-381
- Rights
- © 2013 Taylor & Francis Group.
- Rights
- This metadata is freely available under a CCO license
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