一机六件等应力三点弯曲疲劳试验机的研制  

Development about three-point bending fatigue experiment machine that can test six specimens at same time

作　　者：严庆光[1] 冯梓轩 李湘吉[2] 王瑛玮[1] YAN Qing-guang;FENG Zi-xuan;LI Xiang-ji;WANG Ying-wei(College of Material Science and Engineering,Jilin University,Changchun 130022,China;Roll Forging Institute,Jilin University,Changchun 130022,China)

机构地区：[1]吉林大学材料科学与工程学院,长春130022 [2]吉林大学辊锻工艺研究所,长春130022

出　　处：《吉林大学学报（工学版）》2021年第6期2013-2020,共8页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51275203);吉林省自然科学基金项目(20200201056JC)。

摘　　要：为解决传统一机一件弯曲疲劳试验机效率不高的问题,研制了一种新型一机六件等应力三点弯曲疲劳试验机,用于检测H13钢的疲劳寿命。首先,通过压力机对试样施加载荷,并利用力传感器实时检测载荷是否超过许用值。当载荷超过许用值时,控制器立即撤销该试样上的载荷,而不影响其他试样进行疲劳试验。同时压力机继续加载,直到所有试样断裂,试验结束。该种疲劳试验机能同时对6个试样进行疲劳试验,提高了试验效率。It is inefficient to test only one specimen using traditional bending fatigue experiment machine. A new bending fatigue experiment machine is proposed, which can test six specimens simultenously. The machine is used to test the fatigue life of H13 steel. Firstly, pressure load is applied to six specimens.Then, the force loaded on the specimens is measured by force sensors. The single load is cancelled immediately by the control system if one of the six specimens’ load is bigger than allowable load.Moreover, the fatigue experiment of other specimens is still proceeding. Finally, the bending fatigue experiment is finished as all specimens engender cracks and break due to fatigue. The fatigue life of the specimens is calculated by analyzing the experiment data. The efficiency of bending fatigue experiment is significantly increased via the test of six specimens simultenously.

关 键 词：材料科学与工程 弯曲疲劳试验 一机多件 等应力 三点弯曲 H13钢 上位机 

分 类 号：TG76[金属学及工艺—刀具与模具]