| Summary: | 碩士 === 大同大學 === 機械工程學系(所) === 96 === The osteoporosis is a common symptom which comes after human middle-age . The article that using two different way to research on ossein outflow, and it makes the influences of mechanics behavior.
Using statics viewpoint analyzes human body thighbone behavior of the movement in climbing stairs, and it analyzes the situation of motional stress by Pro/ Mechanica. Under the situation of thighbone is without external force or special impact, we will find that the movement of climbing stairs is not easily to make the fracture of thighbone caused by the ossein outflow.
By using the notch theory, We studied the relationship between the stress concentration factor and the osteoporpsis. The researches discovered that the BMD are in an inverse ratio to the stress concentration factor and the depth of notch, but it is proportioned to radius of notch .The decrease of BMD directly affect the ultimate stress of bones when BMD starts to decrease. We suggest that the patients should pay more attentions to prevent them from outflow of ossein.
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