1) lattice bending
点阵弯曲
2) three-point bending
三点弯曲
1.
Experimental study of crack opening compliance of a three-point bending beam;
三点弯曲裂纹张开柔度的实验研究
2.
Deformation of sandwich beams with spherical pore Al alloy foam core in three-point bending;
球形孔泡沫铝合金三明治梁的三点弯曲变形
3.
Deformation of sandwich beams with Al foam cores in three-point bending;
泡沫铝层合梁的三点弯曲变形
3) three point bending
三点弯曲
1.
The clad material of stainless steel and aluminum alloy is fabricated by semi solid joining method,according with ASTM-E813,three point bending test is carried out,and the fracture behavior of bonding interface is studied with FEM and theory analysis.
研究结果表明:采用三点弯曲实验方法,可以显著降低界面裂纹尖端的复杂应力水平;半固态连接不锈钢-半固态铝合金界面断裂为典型的脆性断裂,界面临界断裂韧性略低于基体铝合金的断裂韧性。
2.
According to three point bending test, the complete processes from the initiation and propagation of micro cracks to the macroscopic failure of the concrete specimen and mortar specimen are simulated through RFPA 2D (Rock Material Failure Process Analysis) Code.
根据混凝土试样三点弯曲试验 ,利用RFPA2D数值模拟系统对砂浆和混凝土三点弯曲试样中预制裂纹的扩展直至试样宏观破裂的整个过程进行了模拟分析 ,指出了混凝土组成材料的非均匀性对裂纹扩展路径的影响。
3.
Stress and energy absorption indexes for rat femurs were measured with the method of three point bending.
对 Na F染毒后再行给药的大白鼠股骨利用三点弯曲强度测试方法进行应力、能量吸收等指标的测试 ;对按不同剂量给药后的大白鼠股骨的强度、能量吸收等指标进行比较和分析 ,据此对氟康宁胶囊、骨苓丸的疗效进行实测分析。
4) four point bending
四点弯曲
1.
Interracial fracture properties of the stainless steel and aluminum bimetal are analyzed with the method of four point bending test,and the interface crack and the interface fracture structure are analyzed with SEM.
采用四点弯曲的试验研究方法,对爆炸焊接不锈钢-铝复层材料界面断裂性能进行了研究,采用扫描电子显微镜对界面裂纹与断口形貌进行观察分析。
2.
A new method for elastic modulus measurement of thin films—four point bending method is presented in this paper.
提出了一种新的薄膜弹性模量测定方法──四点弯曲法 。
5) four-point bending
四点弯曲
1.
With the aid of the analytical methods of composite mechanics,a layered shear-lag model is established to investigate the multiple cracking of reinforced concrete(RC) beam reinforced with carbon fiber sheets under four-point bending.
借鉴复合材料力学的分析方法,建立一种分层剪滞模型,研究了碳纤维片材加固钢筋混凝土梁在四点弯曲载荷作用下的多重开裂破坏,求得了梁纯弯段下部钢筋保护层中的最大裂缝宽度和裂缝密度与施加载荷和碳纤维片材的粘贴层数之间的定量关系,计算结果与现有实验值较吻合。
2.
Based on the study method for mechanics of composite materials,a layering model is established for the redistribution of the stress of reinforced concrete beam strengthened by unidirectional aramid fiber sheet with crack under four-point bending load,and then the distributions of stress and displacement of all the sub-layers are obtained.
借鉴复合材料力学的研究方法,对四点弯曲荷载作用下含裂缝的单向芳纶纤维片材加固钢筋混凝土梁的应力重新分布建立一种分层模型,从而获得了各子层的应力或位移分布。
3.
In order to solve these problems,a four-point bending fatigue test system Cooper NU-14 was used to evaluate the fatigue performance of asphalt mixtures.
鉴于其在加载方式与路面实际受力状态方面存在较大差别、实际开裂模式与理论开裂位置经常不一致,笔者尝试使用一种四点弯曲疲劳试验系统(即Cooper NU-14试验系统)评价沥青混合料的疲劳性能。
6) three point bending test
三点弯曲
1.
Choosing Beishan field granite of Gansu province as object, character of creep rupture for granite under temperature effect was researched with three point bending test which was mended.
选择甘肃北山花岗岩为研究对象,利用改进的三点弯曲试验对花岗岩在温度影响下的蠕变断裂特性进行了初步的试验研究,并分析了应力-应变曲线的变化特点, 得到了200 ℃下北山花岗岩蠕变全过程曲线,研究了北山花岗岩断裂韧度随温度的变化规律, 75 ℃时断裂韧度出现极值,在200 ℃以后呈下降趋势。
2.
In this paper,a series of fatigue experimental study on sucker rod by using the three point bending test method,the P-S-N curve is given by statistical analysis based on the experimental results.
本文针对普通D级抽油杆进行了一系列三点弯曲疲劳实验研究,对实验结果进行了统计分析,得到了相应的P-S-N统计规律,为进一步进行现场抽油杆本体的剩余寿命评估并指导油井的维护维修等奠定了实验和理论基础。
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