岩石疲劳扰动模型的研究  

Research on Fatigue Disturbance Model of Rock

作　　者：王德玲[1] 沈疆海[2] 葛修润 

机构地区：[1]长江大学城市建设学院,湖北荆州434023 [2]长江大学计算机科学学院,湖北荆州434023 [3]武汉岩土力学研究所,湖北武汉430071

出　　处：《水利与建筑工程学报》2006年第2期32-33,58,共3页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金资助项目(10172057)

摘　　要：把扰动状态概念应用于岩石低周疲劳过程。塑性应变的累积是低周疲劳破坏的主要原因。在岩石疲劳试验的基础上建立岩石疲劳扰动模型,以处理疲劳扰动的非线性积累,并反映了荷载参数、塑性应变等因素对疲劳扰动的影响。然后由此推导了疲劳寿命预测方程,预测的疲劳寿命与试验结果吻合较好。The Disturbed State Concept（DSC） is applied in low-cycle fatigue process of rocks. Based on fatigue experiments of rocks, fatigue disturbance model of rock is set up, which can handle with the non-linear accumulation of fatigue disturbance and reflect the effects of load parameters and plastic strain on fatigue disturbance. Then the equation of predicting fatigue life is educed from the model. The predicted life accords with the experimental results very well.

关 键 词：扰动状态概念 疲劳扰动 寿命预测 

分 类 号：TU458.4[建筑科学—岩土工程]