RESEARCH ON APPLICATION OF LINEAR NOTCH MECHANICS TO STRENGTH OF NOTCHED ADVANCED MATERIALS

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This project was divided to the following four parts, and the following result was obtained in the each part.(I)Extension of Linear Notch Mechanics to Large Scale Yielding ProblemThe application limit of Linear Notch Mechanics was discussed quantitively, and It was extented to Non-linear Notch Mechanics which is available even in case of large scale yielding.(II)Application of Linear Notch Mechanics to New MetalsLinear Notch Mechanics was applied to the evalution for the notch strength of new metals for example Ti-alloy, HIP, ceramics coating and so on. As results, it found that Linear Notch Mechanics is valid, and the results were used for data-base in an expert systems.(III)Application of Linear Notch Mechanics to New MaterialsLiniear Notch Mechanics was applied to the evalution for the notch strength of new materials, for example fiber-reinforced-plastics, fine ceramics and so on. As results, it found that Linear Notch Mechanics is valid, and the results were used for data-base in an expert systems.(IV)Relation between Lenear Notch Mechanics and residual stressA method for evaluation of residual stress was developed, and the relation between Linear Notch Mechanics and residual stress was discussed.