材料的强度是受气孔率、弹性模量、断裂能和临界缺陷尺寸控制的。
The strength of materials are controlled by porosity, modulus of elasticity, fracture energy and critical flaw sizes.
在有限元模拟中，分析了初始几何缺陷对壳体起皱的临界压力和起皱形态的影响。
The effect of the initial geometrical imperfection on the buckling critical pressure and buckling model has been taken into account in the finite element simulation.
得到了不同直径和手性角情况下碳纳米管缺陷形核和断裂的临界应变。
The critical strains of defect formation and fracture occurrence of CNTs with different diameters and chiral angles were obtained.
提出多层不等厚可看成是圆柱壳壳壁上的几何缺陷，在一定程度上会减弱经典圆柱壳的屈曲临界应力水平。
The character of unequal-thickness was considered as geometrical defect, which decreases the critical stress of classical shell buckling to some extent.
采用聚焦离子束和场发射扫描电镜对处于临界破坏状态的节瘤缺陷做剖面分析和观察。
Nodular defects, which are in critical state of damage, are cross-sectioned by focusing on the ion beam and by imaging using a field emission scanning electron microscope.
通过关于偏差离散度的参数分析方法，研究节点位置缺陷变离散度对空间网格结构临界荷载的影响规律。
The effect of discrete degree of node location imperfection on the critical load of spatial grid structure was studied through the parameter analysis of deviation discrete degree.
结果表明，当桩身波速准确时，峰-峰点反演精度主要由缺陷实际长度与定义的缺陷临界长度的比值决定。
The results indicate that the precision mainly depends on the ratio of the defect length to the critical defect length defined in this paper when the wave velocity in the piles is accurate.
研究表明，初始缺陷对结构动力稳定临界荷载有影响，并且初始缺陷对不同矢跨比的结构影响不同。
The results show that the dynamic instability critical load of the imperfection structure is different from that of a perfection structure.
研究了注射成形生坯厚度与缺陷产生的临界升温速度的关系。
The relationship between thickness of MIM green parts and critical heating rate was studied.
在GMAW焊接过程中，当焊接速度达到某一临界值时会出现咬边缺陷，进一步提高焊接速度就会产生驼峰焊道。
In GMAW welding process, when the welding speed reaches a certain threshold, there will be onset of weld bead undercut defects.
分析了BFGS算法在约束求解中的应用，指出了在约束求解这一特定的领域利用BFGS算法进行约束求解的两大缺陷：（1）容易陷入局部最优解：（2）无法穿越临界点。
The BFGS algorithm applied in GCS is analyzed and pointed out two shortcomings: (1) always trapped in local optimal solution; (2) can not pass through the critical point.
本文应用非线性有限元法，对考虑初始缺陷的扭壳、扭网壳进行整体稳定分析，获得了临界状态时的失稳模态和临界荷载。
In this paper, the nonlinear FEM is used to analyze the general stability of torsional shell and torsional reticulated shell with original imperfections.
本文应用非线性有限元法，对考虑初始缺陷的扭壳、扭网壳进行整体稳定分析，获得了临界状态时的失稳模态和临界荷载。
In this paper, the nonlinear FEM is used to analyze the general stability of torsional shell and torsional reticulated shell with original imperfections.
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