Through the analysis of the local strain concentration or stress concentration, together with the forming ability model, the occurrence and location of the crake can be predicted. 通过分析局部的应变集中或应力集中再加上金属变型能力模型,裂纹的发生和地点可以预见。
Method of calculating local strain of blood vessel wall based on IVUS image 基于IVUS影像的血管壁局部应变计算方法
Besides, in the position of larger value stress the local strain is smaller that coincide with the law of stress and strain change during the common forging process. 其次,应力值较大的地方应变值较小,符合锻造过程中的应力应变变化规律。
Application of the local strain method to fatigue life estimation of wing main beam specimen 局部应变法在机翼主梁试件疲劳寿命估算中的应用
FEM analysis of local strain fatigue 局部应变疲劳的有限元分析
The uncertainties of pressure vessel result in the randomness of local stress, local strain and fatigue life. 由于压力容器构件的不确定因素,造成了构件局部应力应变响应和疲劳寿命具有随机性。
Based on the residual stress distribution law around the rail bolt hole induced by cold expansion and the local strain analysis, a model which considered the relaxation of residual stress during cycling was built to predict the crack initiation. 建立了基于钢轨螺栓孔残余应力分布规律和局部应变,并考虑残余应力衰减的疲劳裂纹萌生寿命预测模型。
Taylor Polynomials are constructed to calculate the mean value and variance of local stress and local strain. The mean value and variance of component fatigue life is also obtained. 使用Taylor多项式计算局部应力应变的均值和方差,并求出构件疲劳萌生寿命的均值和方差。
Polynomials are constructed to evaluate the random local stress and local strain. 通过建立近似拟合多项式的方法,求得局部应力应变的随机响应。
By using this method, the local slip and the local strain, as well as the distribution and widths of the secondary cracks could be observed directly. 采用这种新方法,可以直接观测沿试件纵向任意点的滑移值和应变值,以及次生裂缝的分布和宽度。
The antibody level between local strain and national representative strain was quite different. 人群对地方流感毒株和国内代表毒株的抗体水平有着较大差异。
Meanwhile, it is shown that as far as the EAC of X-70 pipeline steels in near-neutral pH environments is concerned, the cracking is dominated by the local strain rate no matter which the mechanism is, dissolution or ( and) hydrogen related process. 对X-70管线钢在近中性pH值的环境开裂,不论开裂过程是溶解或(和)氨的作用占主导,均受局部应变速率控制。
The results of the fatigue life calculation are compared with experimental ones and itis thought that the local strain method is a better fatigue information life estimation method, but the traditional nominal stress method still has its use value in engineering. 最后,本文把按局部应力-应变法及名义应力法所得疲劳寿命计算结果与已有的试验结果进行了分析比较。
Based on the local strain method of the single axle stress condition method, the multi axial stress condition computing method of the proportional loading is presented. 基于单轴应变疲劳分析,提出了比例加载多轴应力状态下的疲劳寿命计算方法。
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。
A numerical procedure for calculating local stress and strain at notch tip is presented in the paper and the measurements of local strain at three kinds of notch tip in tension are done. 文中提供了求解局部应力应变的数值计算过程,并进行了三种几何形状缺口,在拉载作用下局部应变实测。
Further more, mechanical facture will take place if the local strain rate is high enough. 该局部应变速率继续升高时,将发生机械断裂。
The S N, ε N and da/ dN Δ K curves are three basic fatigue property data of materials and they are respectively used in stress-life method, local strain method and LEFM crack propagation method to predicate fatigue life of structures. 材料的SN、εN及dadNΔK疲劳性能数据分别是应力寿命法、局部应变法以及LEFM裂纹扩展法进行结构寿命分析的基础。
Conclusion The isolation of local strain of HHV-6 in Qingdao will be helpful in further study of epidemiology and pathogenicity of HHV-6. 结论成功分离培养得到1例HHV-6青岛地方株,为进一步研究青岛地区HHV-6的流行及致病性奠定了实验基础。
Evaluation Formula of Range for Notch Local Strain Δε After Overloading 过载后缺口局部应变范围Δε的估算式
A new control approach is presented with a "local strain compensation" and a low cutoff frequency inertial link feedback in place of the differential one. 提出了局部激励应变补偿和把通常的微分负反馈改为低截止频率的惯性环节正反馈的控制新方案。
The strain of the thin-walled ring section beam is investigated theoretically and experimentally. The result shows the local strain varies as the cosine function of twice the positional angle. 对圆环形薄壁截面梁的应变进行了理论与实验分析,结果表明圆环形薄壁截面梁各点应变与该点角度的二倍呈余弦变化关系。
There is a threshold of change for fatigue damage of rock, and, only when local strain of fatigue damage cumulates and achieves the above-mentioned threshold, the fatigue crack will come into being and expend; 岩石的疲劳破坏存在门槛值,只有在局部应变或损伤疲劳累积达到疲劳裂纹扩展门槛时,疲劳裂纹才会形成和扩展;
Fatigue life prediction under complex load using local strain approach and relative miner's rule 相对Miner法则和局部应力应变法结合预测复杂载荷下构件的疲劳寿命
The effects of the stress ratio and the loading sequence on the local strain range 应力比和加载历程对局部应变范围的影响
Objective: In order to clearly understand some ultrastructure features of a local strain of Pagumogonimus skrjabini from Xingan County, Guangxi, where the brain infection case of this worm was recorded. 目的:探讨广西兴安县人体脑型斯氏狸殖吸虫的超微结构,试图从中了解或寻找某些特性。
The method has the advantage of nominal stress method and local strain method to counteract themselves weakness. 这样,同时运用了名义摩力法和局部应力、应变法的优点,使寿命计算更合理。
One local strain of Canine Herpesvirus causing several diseases and high mortality in one week old puppies was isolated and identified to be canine Herpesvirus by the culture on MDCK cells from kindeys of a dying puppies. 犬疱疹病毒引起1周龄以下仔犬严重和高死亡的疾病,用犬肾传代细胞MDCK,从濒死发病犬的肾脏器官分离获得一株疱疹病毒,经鉴定为犬疱疹病毒。
Local strain concentration in angle-ply lay caused by transverse crack of circular lay in composite pressure vessel was studied by means of advanced shear-lag method. 利用改进的剪切滞后法,研究了组成纤维缠绕压力容器中的环向层的横向开裂而在纵向层中引起的局部应变集中。
A local strain fatigue analysis method and computer program 局部应变疲劳分析方法及计算程序