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1)  nominal value of specific thermal deflection
比弯曲标称值
2)  symmetric bending
对称弯曲
1.
The paper discusses the development of an ultrasonic symmetric bending fatigue system on the basis of the three-point bending method,including the design of ultrasonic symmetric bending samples and the influence of processing errors.
在二点弯曲超声疲劳试验方法的基础上开发了对称弯曲超声疲劳试验系统。
3)  Specific thermal deflection
比弯曲
1.
Based on the national test standard for four characteristic parameters of flexiv ity, specific thermal deflection, elastic modulus and resistivity of thermal bim e tal, the automatic performance test system of thermal bimetal was designed.
根据热双金属的温曲率、比弯曲、弹性模量、电阻系数4个特性参数的国家检测标准,设计了热双金属性能自动测试系统。
4)  axisymmetrical bending
轴对称弯曲
1.
In this paper,the differential equation of axisymmetrical bending problems for circular plate with stepped thickness is derived by using generalized functions.
应用广义函数推出阶梯式变厚度圆板轴对称弯曲的微分方程,并应用初参数和W算符来表述和求解该微分方程。
5)  unsymmetrical bending
非对称弯曲
1.
A deduction method of normal stress fermula of unsymmetrical bending;
非对称弯曲正应力公式的一种推导方法
2.
Based on this fact, this paper proposes two methods to analyze the external loads and the ultimate unsymmetrical bending strength of a damaged ship hull.
基于这样的事实,本文给出了破损船体外载荷和非对称弯曲极限强度分析方法,比较了基于横剖面模数和基于极限强度的剩余强度衡准,并给出了破损船体结构安全性评估的可靠性方法。
3.
the problems of nonlinear unsymmetrical bending for cylindri-cally orthotropic circular plate are studied by using“the method of two-variable” ̄[1],and the uniformly valid asymptotic solutions of Nth-order for ε_1 and Mth-order for ε_2 are obtained.
本文利用“两变量法” ̄[1]研究了圆柱型正交各向异性圆形薄板在非均布横向载荷作用下的非线性非对称弯曲问题,并得到在周边为可移夹支条件下的本问题的一致有效渐近解。
6)  axisymmetric bending
轴对称弯曲
1.
Based on the fundamental equations of three dimensional elasticity,the state equations for axisymmetric bending of laminated transversly isotropic circular plate are established,and an analytical solution for the problem is presented.
从三维弹性力学基本方程出发,建立了横观各向同性层合圆板轴对称弯曲问题的状态方程,并给出问题的解析解。
2.
Based upon the fundamental equations of three dimensional elasticity, the state equation for axisymmetric bending of laminated transversely isotropic circular plate is established and the concentrated force on plate surface is expanded into Fourier_Bessel s series, therefore, an analytical solution for the problem is presented.
从三维弹性力学基本方程出发,建立了横观各向同性层合圆板轴对称弯曲问题的状态方程,并将板面的集中载荷展成付里叶贝塞尔级数,从而给出问题的解析解· 此解满足弹性力学全部方程,计及了所有独立的弹性常数,并满足层间连续性条件
补充资料:弯曲工艺的概念及弯曲件

1.弯曲工艺:是根据零件形状的需要,通过模具和压力机把毛坯弯成一定角度,一定形状工件的冲压工艺方法。


2.弯曲成形工艺在工业生产中的应用:应用相当广泛,如汽车上很多履盖件,小汽车的柜架构件,摩托车上把柄,脚支架,单车上的支架构件,把柄,小的如门扣,夹子(铁夹)等。 


弯曲的基本原理:以V形板料弯曲件的弯曲变形为例进行说明。其过程为: 
   1. 凸模运动接触板料(毛坯)由于凸,凹模不同的接触点力作用而产生弯矩, 在弯矩作用下发生弹性变形,产生弯曲。
  2. 随着凸模继续下行,毛坯与凹模表面逐渐靠近接触,使弯曲半径及弯曲力臂均随之减少,毛坯与凹模接触点由凹模两肩移到凹模两斜面上。(塑变开始阶段)。
  3.随着凸模的继续下行,毛坯两端接触凸模斜面开始弯曲。(回弯曲阶段)。
   4.压平阶段,随着凸凹模间的间隙不断变小,板料在凸凹模间被压平。
  5. 校正阶段,当行程终了,对板料进行校正,使其圆角直边与凸模全部贴合而成所需的形状。 


弯曲变形的特点:  弯曲变形的特点是:板料在弯曲变形区内的曲率发生变化,即
弯 曲半径发生变化。从弯曲断面可划分为三个区:拉伸区、压缩区和中性层。

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