1) three-point bending beam
三点弯曲梁
1.
Experimental study on fracture parameters of three-point bending beam based on smart properties of CFRC;
基于碳纤维混凝土(CFRC)机敏性的三点弯曲梁断裂参数试验研究
2.
Based on the assumption that the rotation point of the notched three-point bending beam under loading is the tip of effective fictitious crack,a new formula for calculating the fracture energy of concrete according to the measured relationship between load and crack-mouth opening displacement(CMOD) of three-point bending beam is proposed.
在采用荷载-裂缝口张开位移曲线确定断裂能思路的启发下,假设带缺口梁旋转点为等效虚拟裂缝的尖端点,根据旋转角和断裂功的概念,推导出了由三点弯曲梁试验测定的荷载-裂缝口张开位移曲线计算断裂能的计算公式,进行了不同高度的三点弯曲梁断裂试验,使用新公式计算了断裂能。
3.
The three-point bending beam fracture test for cement paste and mortar specimens with different strengths,dimensions and initial crack-depth ratios was carried out.
本文针对水泥净浆和水泥砂浆两种灌浆材料,采用三点弯曲梁进行了不同强度、不同尺寸以及不同初始缝高比的断裂试验。
2) three point bending beam
三点弯曲梁
1.
The paper also studies the function of CFRC in three point bending beam.
还对碳纤维混凝土在三点弯曲梁中的应用进行了研究。
3) three-point bend round bar
三点弯曲圆梁
4) three-point microbend test
微薄梁三点弯曲
5) three-point bending beam test
三点弯曲梁试验
1.
Based on the crack characteristics of steel deck bridge pavement and theory of fracture mechanics,the stress intensity factor K and J integral was introduced to analyze three-point bending beam test of the epoxy asphalt concrete.
基于桥面铺装的裂缝特点及断裂力学理论,引入应力强度因子K和J积分对环氧沥青混凝土三点弯曲梁试验进行分析,研究了温度和初始缝高比对其断裂特性的影响。
6) three-point bending beam
三点弯梁
1.
The present tensile strain localization zone, whose thickness depends on characteristic length of quasi-brittle materials, is substituted for the previous crack band in three-point bending beam.
以拉应变局部化区域代替裂纹带,在三点弯梁裂纹带(具有一定尺寸的带宽由特征长度确定)内部存在着不均匀分布的拉应变,这与实验结果相符。
2.
This integration scheme is used in an XFEM analysis to model the fracture of a three-point bending beam using the cohesive crack model.
利用基于该积分方案的扩展有限元程序,结合粘聚裂纹模型实现了对三点弯梁开裂过程的模拟。
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。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条