This paper is based on the understand of the concrete material. The mathematic model to study the process of concretes damage and fracture is being put forward.
本论文立足于对混凝土材料特性的认识，提出一个进行混凝土损伤与断裂过程模拟的细观数值模型。
The sliding crack model has been widely applied in the damage and fracture analysis of the rock-like materials.
滑动裂纹模型被广泛应用于岩石类材料压剪断裂分析及损伤分析。
The calculated results coincide with damage zone sizes estimated by means of WEK fracture model.
其结果与WEK断裂模型所估计的损伤区尺寸颇为一致。
Fatigue damage estimation of the tendons was made using fracture mechanics approach, establishing the fracture crack growth rate model and limit state equations for failure modes.
疲劳寿命的计算采用断裂力学方法，建立疲劳裂纹扩展模型和失效模式的极限状态方程。
Based on the existing damage model of rock blasting and the theory of rock damage and fracture, a new damage model for rock blasting has been founded.
在分析现有岩石爆破损伤模型和岩石爆破损伤断裂理论的基础上，建立了新的岩石爆破损伤模型。
In mining engineering, strata models are often simulated by similar material simulation model, rock bending deformation and fracture damage is the serious problem.
而在采矿工程中，相似材料模拟的往往是层状模型，岩层的弯曲变形和断裂破坏是关键问题。
In this paper, a rheologic damage fracture model for jointed rocks is built and is utilized to analyze stability of seam floor rocks in mining.
本文采用损伤力学的研究方法，建立了裂隙岩体的损伤流变断裂力学模型。
Ice damage under natural conditions showed various forms of fracture model.
自然条件下冰的破坏表现为各种形式的断裂。
It is shown that the proposed ductile fracture model can accurately and effectively predict the whole damage process of ductile metals including crack initiation, propagation and final fracture.
结果表明，该模型可很好地预测延性金属材料自裂纹萌生、扩展直至完全断裂的全过程。
The utility model belongs to a medical bone wall reamer which is suitable for reaming a bone wall before extracting a left screw after the healing of all kinds of fracture damage.
本实用新型属于医用骨壁扩孔器，适合于各类骨折损伤愈合后需取出残留螺钉前作骨壁扩孔用。
The utility model belongs to a medical bone wall reamer which is suitable for reaming a bone wall before extracting a left screw after the healing of all kinds of fracture damage.
本实用新型属于医用骨壁扩孔器，适合于各类骨折损伤愈合后需取出残留螺钉前作骨壁扩孔用。
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