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| Analysis on failure of quenching ceramics using state-based peridynamics |
| Received:November 30, 2020 Revised:December 30, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20201130001 |
| KeyWord:composite ceramics thermal shock peridynamics crack propagation fracture simulation |
| Author | Institution |
| 何德威 |
河海大学 力学与材料学院, 南京 |
| 黄丹 |
河海大学 力学与材料学院, 南京 |
| 徐业鹏 |
河海大学 力学与材料学院, 南京 |
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| Abstract: |
| The failure process of quenching ceramics is investigated based on state-based peridynamic theory.A three-dimensional nonlocal thermoelastic brittle peridynamic model is proposed,in which a thermal expansion term is introduced to reflect thermal deformation and the damage is defined on material-point bond scale. With multirate integration method for thermal-mechanical coupling calculation,the proposed model is employed to simulate the crack initiation and propagation process of quenching Al2O3 ceramic plates,and its validation is established by comparing the simulation results with available experimental and other numerical results.Further investigations into the damage of Al2O3 composite ceramic plates with different α-Al2O3 fiber ratio indicate that the increase of fracture toughness can reduce the number of cracks and delay crack initiation time significantly,and the composite with 5% α-Al2O3 fiber ratio shows excellent comprehensive mechanical properties to improve the strength of ceramic components under thermal shock loading. |