裂点

通过计算得到三点弯曲试样的动态裂纹尖端张开位移COD以及动态裂纹扩展量Δa，在此基础上得到裂纹动态起裂点。

Dynamic crack tip open displacement COD and a crack extension Δ a for three point bending specimen are obtained by calculating .

Charpy裂纹试样的启裂点确定与动态断裂韧性

Crack initiation point determination and dynamic fracture toughness for Charpy pre-cracked specimen

依据柔度变化率法确定起裂点，获得动态起裂韧度JⅠD。

The time of crack initiation is determined by the compliance changing method , and corresponding dynamic crack initiation toughness J_ (ⅰ D ) is obtained .

通过两种试验方案，研究了脆性材料HT200在压缩过程中的启裂点、断裂方向以及强度的尺寸效应。

By the two test schemes , the point of crack initiation , the fracture direction and the size effect of strength of brittle material HT200 in the process of compression are studied .

最高海拔约1800m，在海拔350～1200m，有7级剥蚀夷平面，形态有山顶缓坡型、山坡肩膀型、谷底裂点型（占绝大多数）。

The elevation of the areas is generally from 350m to 1200m with the highest 1800m . There are seven levels of denudation planation surfaces , which are expressed as gentle slope hilltop , shoulder-shape hillside and valley bed nickpoint ( accounting for great proportion ) .

研究了改进的节点撕裂法，通过引入拟裂点，并融合了逐级撕裂搜索法，使得网络的撕裂具有很大的灵活性。

The method introduces pseudo-tearing nodes and makes the network tearing more flexible .

目前采用的确定混凝土拉伸断裂初裂点的方法，受人为因素影响大。

The conventional method for determining the first crack point of concrete in direct tension is greatly dependent on the judgment of idvidual .

以此为基础，用裂点法对郑州与周边相邻、相关城市的不同城市要素相互作用的范围进行了分析。

Accordingly , the radiant scopes of different factors between Zhengzhou and other cities concerned are analyzed by using the theory of breaking point .

但是，声发射信号的起始点并不是主裂纹起裂点，失稳前阶段也不能与亚临界扩展阶段等同。

But the beginning of the acoustic emission sign is not the cracking point of main crack , and the preinstability stage may not be equal to the subcritical growth stage .

裂点环模型是服务设施规模不等情况下对区域服务范围进行划分的有效工具。

Break-point-ring model is an effective tool of dividing service areas when the servers are in different scales . This improved mixing dielectric model yields an excellent fit to measured data .

根据裂点环理论，仓库与分厂相互作用力最大（各个仓库对分厂均有作用力），则该分厂属于该仓库的作用范围。

According to the breaking point annulus theory , if the interaction force between the warehouse and the filiale reaches the maximum , then the filiale belongs to the action range of the warehouse .

其特点是先将邻裂点的电位表述为分裂点电位的线性函数。然后建立分裂点电位方程。

The characteristic of this method is firstly expressing the potentials of adjacent nodes which are close to split points in linear functions of the potentials of split points , and then establishing the potential equations of these split points .

使用改进型柔度变化率法得到了低温下不锈钢母材夏比冲击试样的起裂点，通过对比发现改进型法得到的结果比传统的柔度变化率法得到的结果更加准确。

Modified compliance changing rate method is used to obtain the crack initiation point of stainless steel base metal charpy specimen . The analysis show that results obtained by the improved method is more accurate than that by traditional compliance changing rate method .

作者从简析投标规划传统思路的缺陷&规划目标与条件间的裂点入手，以逻辑重构和系统观点重建了投标规划的设计过程和目标优化模式。

Beginning from the brief analysis on the drawbacks of traditional ideas in bidding planning and the gap between objectives and conditions , this paper attempts to reconstruct the designing process and the optimal pattern of objeCtives in bidding planning with logical and systematic methods .

用计算机模拟视觉处理技术识别纰裂临界点

Identification of Slippage Critical Point by Vision_Simulated Computer

本文介绍了节理的断裂力学机制研究进展.从岩石断裂力学观点出发，节理是以张开位移为主的断裂构造，节理面结构可以通过由裂源点、羽纹和奋状标志组成的羽状构造表征。

From the view of rock fracture mechanics , joints are fractures with dominant opening displacements and the joint surface morphology features plumose structures which include the origins , hackles and rib marks .

对4种不同的钢纤维混凝土和2种相应的素混凝土进行了抗压、劈裂和4点弯曲实验。

Four different steel fiber reinforced concretes and two corresponding plain concretes are tested for compression , splitting and 4 points bending .

目的为骶管阻滞麻醉骶管裂孔穿刺点体表定位、进针方向及深度探索一种新的方法。

Objective To explore a new method for body surface orientation of the puncture site , determination of the direction of the needling and puncture depth for caudal block .

本文的主要特点为有料向板条的选取及荷载传递、简支不规则板的负弯矩裂缝线以及点支承板条和板的剪切劈裂问题。

The distinguishing features of the paper are selection of oblique strip and loading transmission , negative yielding line in irregular slab with simple supports , point support and shear split of slab .

本文提出用裂尖附近2点或3点的应力和位移计算应力强度因子KI的杂交方法。

In this paper , a hybrid method for calculating stress intensity factors K_ (?) of plane problems is proposed .

减少东风（4B）型机车牵引齿轮罩裂损的几点作法和建议

Some measures and suggestions for reducing traction gear cover cracks of DF_ ( 4B ) locomotives

关于自由面速度剖面解读层裂问题的几点商榷

Discussion on the Spallation Behavior Resolved by Free-Surface Velocity Profile

计算结果表明，电导图谱及其共振峰的劈裂依赖于量子点的几何尺寸、量子点的数目及量子点中势的大小。

The results indicate that the conductance and the resonant splitting are dependent on the structural dimension , the number of quantum dots and the strength of negative potential .

结论：对颅底非孔裂薄弱区中心点的准确定位和范围大小的测定，为颅底骨折及颅内超声探查提供科学依据。

Conclusions : Accurate localization and measurement of skull bottom non-hole crack weak area central point provides the scientific basis for the ultrasonic investigation in the skull and the skull bottom bone fracture .