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| Numerical approach on the thermo-mechanical coupling of brittle material |
| Received:April 19, 2007 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20092005 |
| KeyWord:transient thermal conductivity thermo-mechanical coupling heterogeneity failure process |
| Author | Institution |
| 唐世斌 |
大连理工大学土木水利学院,大连 |
| 唐春安 |
大连理工大学土木水利学院,大连 |
| 李连崇 |
大连理工大学土木水利学院,大连 |
| 梁正召 |
大连理工大学土木水利学院,大连 |
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| Abstract: |
| On the basis of the principle of thermal conduct equation and the coupling of thermo-mechanical concept, and considering the characteristic of damage evolution law at mesoscopic level of brittle materials, we proposed a numerical model to simulate the coupling of thermo-mechanical behaviour and the damage evolution. For the remarkable feature of concrete-like materials, i.e. nonhomogeneity at mesoscopic, statistical method is employed to describe the relationship of mechanical response between mesoscopic level and macroscope level. It indicates that the temperature distribution and stresses fields are remarkably influenced by the heterogeneous of materials. The numerically simulated results are verified by the theoretical and experimental data. The comparison of the failure processes at steady state and transient state thermal conduction of the same sample indicate that the failure zone of steady state thermal conduction is large than that of transient state. The results reveal that the thermal cracking by considering the transient thermal conduction is more precise and reliable than that of steady state. |
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