Numerical study on contact zone in an interfacial crack
This thesis presents an analysis for contact zone near an interfacial crack tip by using the commercial FEM software ANSYS 5.0 and 5.3. The numerical study with various parameters extended from elastic to elastic-plastic range. In the elastic range, the study shows that the contact zone occurs when...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2008
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| Online Access: | http://hdl.handle.net/10356/13405 |
| _version_ | 1824456059576647680 |
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| author | Shen, Hongnian. |
| author2 | Fan, Hui |
| author_facet | Fan, Hui Shen, Hongnian. |
| author_sort | Shen, Hongnian. |
| collection | NTU |
| description | This thesis presents an analysis for contact zone near an interfacial crack tip by using the commercial FEM software ANSYS 5.0 and 5.3. The numerical study with various parameters extended from elastic to elastic-plastic range. In the elastic range, the study shows that the contact zone occurs when shear loading is dominant along certain directions. The maximum contact zone size occurs when the specimen is subjected to pure shear loading. Material constant mismatch, such as Young's modulus ratio, plays a part in the size of the contact zone. Furthermore, the effect of friction between crack surfaces on fracture parameters is also studied for some cases. For elastic-plastic materials, the ductile solid is assumed to obey the J2 flow theory of plasticity under plane strain conditions. The results show the plastic deformations generally reduce the size of contact zone near the crack tip, and have a big influence on fracture parameters. In addition, plastic zone shapes are compared with different loading and material combinations. |
| first_indexed | 2025-02-19T03:48:05Z |
| format | Thesis |
| id | ntu-10356/13405 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:48:05Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | ntu-10356/134052023-03-11T17:17:14Z Numerical study on contact zone in an interfacial crack Shen, Hongnian. Fan, Hui School of Mechanical and Production Engineering DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics This thesis presents an analysis for contact zone near an interfacial crack tip by using the commercial FEM software ANSYS 5.0 and 5.3. The numerical study with various parameters extended from elastic to elastic-plastic range. In the elastic range, the study shows that the contact zone occurs when shear loading is dominant along certain directions. The maximum contact zone size occurs when the specimen is subjected to pure shear loading. Material constant mismatch, such as Young's modulus ratio, plays a part in the size of the contact zone. Furthermore, the effect of friction between crack surfaces on fracture parameters is also studied for some cases. For elastic-plastic materials, the ductile solid is assumed to obey the J2 flow theory of plasticity under plane strain conditions. The results show the plastic deformations generally reduce the size of contact zone near the crack tip, and have a big influence on fracture parameters. In addition, plastic zone shapes are compared with different loading and material combinations. Master of Engineering (MPE) 2008-08-06T04:28:45Z 2008-10-20T08:16:09Z 2008-08-06T04:28:45Z 2008-10-20T08:16:09Z 1999 1999 Thesis http://hdl.handle.net/10356/13405 en 109 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics Shen, Hongnian. Numerical study on contact zone in an interfacial crack |
| title | Numerical study on contact zone in an interfacial crack |
| title_full | Numerical study on contact zone in an interfacial crack |
| title_fullStr | Numerical study on contact zone in an interfacial crack |
| title_full_unstemmed | Numerical study on contact zone in an interfacial crack |
| title_short | Numerical study on contact zone in an interfacial crack |
| title_sort | numerical study on contact zone in an interfacial crack |
| topic | DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics |
| url | http://hdl.handle.net/10356/13405 |
| work_keys_str_mv | AT shenhongnian numericalstudyoncontactzoneinaninterfacialcrack |