电测法测量中心带圆孔的透明材料拉伸板的应力集中系数（Measurement of stress concentration factor of transparent material stretching plate with circular hole by electric measuring method）.docVIP

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2017-09-02 发布于河南
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电测法测量中心带圆孔的透明材料拉伸板的应力集中系数（Measurement of stress concentration factor of transparent material stretching plate with circular hole by electric measuring method）.doc

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电测法测量中心带圆孔的透明材料拉伸板的应力集中系数（Measurement of stress concentration factor of transparent material stretching plate with circular hole by electric measuring method）

电测法测量中心带圆孔的透明材料拉伸板的应力集中系数（Measurement of stress concentration factor of transparent material stretching plate with circular hole by electric measuring method） Measurement of stress concentration factor of transparent material stretching plate with circular hole by electric measuring method Introduction： In engineering, many components begin to fail at the maximum stress at the stress concentration. Therefore, it is important for engineering design to determine the maximum stress at the stress concentration of engineering components and calculate the stress concentration factor. In this experiment, the stress concentration factor of a limited width transparent material stretching plate with a circular hole was measured by electric measuring method. The calculated results were in good agreement with the theoretical results. First, the patch program The specimen size and placement scheme as shown in Figure 1, then the maximum stress is O specimen in uniaxial stress state, so long as the X axis of the EMBED Equation.3, we can calculate the maximum stress. SHAPE the MERGEFORMAT Referring to relevant data, we can know the stress concentration factor O at the K=2.08 point. The arithmetic step by step loading method, the EMBED Equation.3 strain. The strain gauge values shown in the table below EMBED Equation.3 (EMBED Equation.3) P (N)940890662710665726 644869825910801881 13821460137815583026220523012185 2448216928502728 308516040622985312 2994334530153955note: P=200N, pulled off the plate. P=40N is taken as an example to solve the corresponding stress concentration factor. Two, calculate the three strain A strain gauge with a size of 2mm*5mm is used, and the A, B and C can be obtained by the position of each strain gauge and the strain at each point Strain EMBED Equation.3 at three points. Since there are three values of strain measured at O Equation.3, the simplest function is EMBED: EMBED Equation.3 (1) If the effective length of th