基于数字图像相关和有限元法分析45＃钢悬臂梁在微小外力下的应变场

Analysis of the Strain Field of 45# Cantilever Beam under Tiny External Forces Based on Digital Image Correlation Method and Finite Element Analytic Method

摘要: 本文利用数字图像相关法和有限元分析对45#钢悬臂梁的局部应变场进行分析。首先，基于2D数字图像相关软件Ncorr对悬臂梁的应变场进行计算，并给出相应的分析。其次，借助模型建立软件Pro/E和有限元计算商业软件Ansys 15.0下的Static Mechanical模块对被测材料进行应变模拟仿真。最后，对比测量结果与仿真结果可看出Ncorr软件和商业软件得出的结果相吻合，均得出观测点离作用力位置距离越远，应力越小的应力变化趋势。

Abstract: This paper uses the digital image correlation method and the finite element analysis to analyze the strain field of 45# steel cantilever beam. Firstly, the strain fields of the cantilever beam are calculated employing MATLAB 2D digital image correlation software Ncorr, and the corresponding analyses are given. Then, simulation results of the strain fields of the tested materials were carried out by using the model building software Pro/E and the Static Mechanical module under the finite element calculation commercial software Ansys 15.0. Comparing the calculation results with the simulation results, it can be seen that the results of Ncorr software and commercial software are in good agreement with each other. All of the results show that the farther the observation point is away from the position of the force, the smaller the stress is.