The study of fatigue failure life and crack propagation life prediction on femur bones broken

• Main Authors: Hao-wen Chen, 陳皓文
• Other Authors: Chao-ming Wang
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/hsz58j

碩士 === 大同大學 === 機械工程學系(所) === 107 === In the health check for general national health insurance, there are only some tests for chronic diseases and organ function that occur in older people. There is no item to detect bone density. The elderly often ignore the importance of human bones. When Osteoporosis is known, most of the fractures have occurred in normal life, and the bone density has reached the fourth level of osteoporosis standard set by the World Health Organization (WHO), which is severe osteoporosis. Severe Osteoporosis. It is assumed that the bone density value detected by the medical instrument can be predicted by bone embrittlement or sudden life before fracture. It is a great boon for patients with osteoporosis. Today's medical examination of osteoporosis requires special and specialized instrumentation to detect bone mineral density. However, bone density can only provide bone density in patients and diagnose osteoporosis. It cannot be effectively predicted. The time of the fracture. Predicting the time of bone embrittlement or sudden fracture, so in the femur of patients with osteoporosis, due to the reduction of collagen and other substances, the trabecular bone is exposed, as a notch of fatigue damage, over time As the passage, the pore structure of the trabecular bone gradually increases to form a larger hole, and the larger hole is regarded as a crack propagation from notch root, and the crack growth and material are discussed. The relationship between fatigue life prediction and BMD.