3 dimensional CAD education have just now begun globally. In America, 3 dimensional CAD education shifts to a lower grades and to lose former CG education. Moreover, the movement which is promoted from 3 dimensional CAD education and is made to develop into CAM and CAE education is also seen.

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Many things are still unknown or not fully understood, and therein lies the attraction of the biomechanical field. Strength of materials is as relevant to living organisms as to physiology and biosolid mechanics, and mechanical engineers are making contributions to the understanding of cell biology, physiology, as well as to the establishment of medical, rehabilitation, and genetic engineering. In this paper, from the point of view of strength of materials, the application to implant fracture, implant-bone interface, and to the det ermination of contact pressure distribution for knee osteotomy were introduced. Mechanics plays an important role in the development of the robotic surgery and new medical techniques in future.

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Fatigue life estimation of solder joints is one of the most critical technologies for the development of electronics devices. The combination of inelastic stress analysis and low cycle fatigue concept are very useful to predict the life of solder joints. In this report, applications of this method for BGA with 63Sn-37Pb solder bumps are introduced.

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