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
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
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
Introduces the algorithm of three points arc in maximum error approximating curve,theoretically making arc approximated sections minimum.
讨论了三点圆弧最大误差逼近曲线的算法,理论上使圆弧逼近的段数达到最少。
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。
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。
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。
Measurement techniques of cylindricity with three-point method;
圆柱度的三点法测量技术
The application of Error Separation Techmique or EST to the on-line measurement of straightness error with three-point method is studied.
对三点法误差分离技术（ＥＳＴ）应用于在线测量直线度误差进行了研究，并在推导数学模型的基础上进行了仿真计算。
In this paper a new method, three-point method, for solving the laser beam drift in its directions is presented.
提出运用三点法补偿激光束不稳定性误差,在时间和空间上获得较稳定的激光束。
The practical bonding property of the interface and the bending resistance were demonstrated using three-point bending tests carried out with the prepared aluminum alloy foam sandwich panel.
通过对制备出的泡沫铝三明治进行三点抗弯实验验证界面的结合性和整体的抗弯性。
The principle of three point method and its variation including two point method and four point method for roundness error separation was introduced.
论述了圆度误差分离的三点法及演化形式——二点法和四点法的基本原理 ,通过分析它们各自的特点和测量精度指出权函数的取值是影响测量精度的关键因素 ,应通过合理选择测量系统参数以避免谐波抑制的发生 ,而且应针对具体情况选择适当的圆度误差分离方
Aim To improve the accuracy of measuring roundness and spindle mo tion error with three point method.
目的研究进一步提高三点法测量圆度及轴系运动误差精度的方法。
In this paper, the fundamental theory and algorithm of independent component analysis (ICA) are introduced,and it is proposed to utilize the ICA method for the error separation in the 3-point method for measuring the roundness error of large shafts,in which the requirement for the measurement system in the structure precision and the precision of sensor positions is reduced.
文章介绍独立分量分析的基本理论和算法,提出在大轴圆度误差的三点法测量中应用独立分量分析进行误差分离,可降低对测量系统结构精度、测头布置及测头间夹角精度的要求。
The results indicated that three methods all make good fitting precision,especially the 3-point method;according to the mathematical m.
考虑到模型适用范围和预测精度等问题,结合工程实例,比较了模型中参数K的三种估计方法,并用线性回归获得另外两个参数a、r,应用结果表明:三种方法拟合精度都较高,其中以三点法最优;在沉降发展的时间预测上,根据模型的数学意义,以拐点法最优,三点法和四点法预测效果不理想。
The formula estimating parameter K of the model with 3-point method was deduced.
本文推导了用三点法估计该模型中参数K值的公式 ,并提出了估计K值的新方法一四点法和拐点法。