CYCLE-DEPENDENT AND TIME-DEPENDENT BONE-FRACTURE WITH REPEATED LOADING
CYCLE-DEPENDENT AND TIME-DEPENDENT BONE-FRACTURE WITH REPEATED LOADING
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DOI：
10.1115/1.3138401
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发表时间：
1983-01-01
影响因子：
1.7
通讯作者：
CALER, WE
中科院分区：
文献类型：
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作者：
CARTER, DR;CALER, WE
在张力-压缩 (T-C) 和零张力 (O-T) 模式下进行人体皮质骨疲劳测试（最多 1.74 × 106 个循环），并具有 2Hz、应力控制、正弦加载历史。还进行了恒定应力水平下的拉伸蠕变断裂试验。 T-C 样本的初始循环应变范围与失效循环之间的关系与之前在应变控制下的低周疲劳中得出的关系一致。使用与时间相关的失效模型，发现蠕变断裂数据与之前关于应变率对骨单调拉伸强度影响的研究一致。该模型还很好地预测了 O-T 疲劳试样的失效时间，表明蠕变损伤在 O-T 疲劳试样中起着重要作用。
Fatigue tests of human cortical bone (up to 1.74 × 106cycles) were conducted under tension-compression (T-C) and zero-tension (O-T) modes with a 2Hz, stress controlled, sinusoidal loading history. Tensile creep-fracture tests at constant stress levels were also performed. The relationship between the initial cyclic strain range and cycles to failure with the T-C specimens were consistent with that derived previously in low-cycle fatigue under strain control. Using a time-dependent failure model, the creep-fracture data was found to be consistent with previous studies of the influence of strain rate on the monotonic tensile strength of bone. The model also predicted quite well the time to failure for the O-T fatigue specimens, suggesting that creep damage plays an important role in O-T fatigue specimens.