• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2005.05a
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• pp.264-271
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• 2005

This study investigates the behavior of fatigue crack propagating between holes or holes filled with another materials. When holes or the holes bonded with another materials exist near center crack symmetrically, crack propagation rate is influenced by the bonding force of brazing part and the elastic modulus ratio of another material to matrix. It is experimentally and analytically confirmed that the center crack stops when its tip reaches near the center line of the holes and a small crack is initiated from the boundaries of holes or the holes filled with another materials and it propagates to final fracture. The mechanical behaviors of center crack near another materials are also investigated.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.14 no.6
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• pp.74-82
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• 2005

This study investigates the behavior of fatigue crack propagating between holes or holes filled with another materials. When holes or the holes bonded with another materials exist near center crack symmetrically, crack propagation rate is influenced by the bonding force of brazing part and the elastic modulus ratio of another material to matrix. It is experimentally and analytically confirmed that the center crack stops when its tip reaches near the center line of the holes and a small crack is initiated from the boundaries of holes or the holes filled with another materials and it propagates to final fracture. The mechanical behaviors of center crack near another materials are also investigated.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.10a
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• pp.448-451
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• 2005

It was observed that after unloading or removal of the load from the specimen subjected to bending stress, partial or full elastic spring back occurred and considerable stresses have resulted while plastic deformation was considered. ABAQUS is a suite of powerful engineering simulation programs, based on the finite element method. In this paper, it was used as the main tool to analyze elastic and plastic deformations of hi-material metal joint. In the case of elastic deformations, the results were comparable to the theoretical data. Plastic deformations and residual stresses of hi-material metal joint under bending moment were obtained by ABAQUS; where the theory needs to be studied and improved further to verify the results.

• Cement Symposium
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• no.25
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• pp.117-123
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• 1997

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.10a
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• pp.222-222
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• 2003

• Proceedings of the KWS Conference
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• 1999.10a
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• pp.273-276
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• 1999

• Proceedings of the KWS Conference
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• 2000.10a
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• pp.159-161
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• 2000

• Proceedings of the KWS Conference
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• 2006.10a
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• pp.83-85
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• 2006

• Proceedings of the KWS Conference
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• 1994.10a
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• pp.51-55
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• 1994

• Proceedings of the KWS Conference
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• 1999.05a
• /
• pp.110-113
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• 1999