In this thesis, the stress intensity factors of top-down cracks caused by loading are calculated using three dimensional finite element model and compared to the results of plane strain model.
本文采用三维有限元模型分析了荷载作用下自上而下裂缝尖端的应力强度因子，并与二维平面应变模型分析的结果进行比较。
Introduced in this paper are two fracture critical surfaces of three dimensional mixed mode obtained from the theory of strain energy density factor and the theory of maximum tensile strain.
本文对按应变能密度理论和最大拉应变理论所推导出的两个三维复合型断裂临界曲面作了简要介绍。
The paper studies distribution law of stress and strain of gate-dam under static regime with three-dimensional finite element method.
本文采用三维有限元方法，研究堰闸坝在静力状态下其应力和变位的分布规律。
A three-dimensional transfer matrix model was presented to simulate the sound absorption coefficients of the graded polyurethanes based on relation of stress and strain of polymers.
根据高分子材料中三维应力应变关系建立了三维传递矩阵数学模型，模拟梯度聚氨酯在不同入射角下的吸声性能。
According to the characteristics of loads on blades, a model for estimating fatigue life of blades is presented based on three-dimensional finite element method and improved local strain method.
根据汽轮机低压叶片所受载荷的特点，建立了一种基于三维有限元法和改进局部应力应变法的叶片疲劳寿命预测模型。
Three dimensional nonlinear and isoparameter FEM has been successfully used to simulate the transient temperature field, phase transformation, stress and strain of complex components during quenching.
采用非线性等参元三维有限元算法（FEM）成功地模拟了形状复杂的零件淬火过程中瞬态温度场、相变、应力和应变，获得直观的立体图象。
Objective: to evaluate left atrial (LA) systolic function in patients with uremia by strain rate imaging (SRI) and real-time three dimensional echocardiography (3-de).
目的：探讨应变率成像(SRI)及三维超声成像(3 - DE)评价尿毒症患者左房收缩功能的临床价值。
Three dimensional finite element method was used to analyse the stress and the strain in the vicinity of crack tip.
并采用三维有限元数值法分析了裂纹尖端的应力应变场。
A three-dimensional finite element model was developed to analyze the strain-stress and the deformation performances of soil nailing, and the reasonable distribution of soil-nail stress was presented.
通过建立三维有限元模型，对土钉支护的变形和受力性能进行分析，得出土钉力的合理分布。
The three-dimensional effects of pile head and applicability of plane-section assumption are main problems in low strain dynamic tests on cast-in-situ concrete thin-wall pipe piles.
现浇薄壁管桩低应变检测时，存在桩头三维效应以及平截面假定的适应性问题。
The three-dimensional effects of pile head and applicability of plane-section assumption are main problems in low strain dynamic tests on cast-in-situ concrete thin-wall pipe piles.
现浇薄壁管桩低应变检测时，存在桩头三维效应以及平截面假定的适应性问题。
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