14冷轧带肋钢筋应力松弛试验机的研制.doc

莫玲1, 陈光明2, 王志虎1, 张韶辉1, 母宇渊1, 张竹1, 彭建兵1
(1. 国家日用金属制品质量监督检验中心(成都),四川成都 610031;2. 深圳高品检测设备有限公司,广东深圳 518112)
摘要:针对冷轧带肋钢筋材料在高应力(高于松弛下限)作用下会产生流变(晶格变形、滑移),应力将随时间衰减的特性,研制该电子应力松弛试验机。该机采用MaxTest标准化模块软件系统进行应力、变形和位移闭环的自动控制,同时在结构设计上通过使用三爪夹具保证防滑,通过结构力学的核算来保证其刚度,从而具有防止试样打滑、精确地负荷和形变控制、连续并适时地绘制松驰力-试验时间曲线的特点,并设计在意外因素(停电、断电)下继续进行试验的措施,充分满足标准要求和实际工作需要。
关键词:形变;负荷;应力松弛;适时;夹具
中图分类号:;+2;+8; 文献标志码:A 文章编号:1674-5124(2012)05-0051-04
Development of cold rolled ribbed steel bar stress relaxation testing machine
MO Ling1, CHEN Guang-ming2, WANG Zhi-hu1, ZHANG Shao-hui1, MU Yu-yuan1,
ZHANG Zhu1, PENG Jian-bing1
(1. National Daily Metal Product Quality Supervision and Inspection Center(Chengdu),Chengdu 610031,China;
2. Shenzhen Gopoint Detection Equipment Co.,Ltd.,Shenzhen 518112,China)
Abstract: For cold rolled ribbed steel bar material in high stress (higher than the relaxation limit) generates rheological (lattice deformation, slip) behavior and the stress decays with the time, the authors designed the electronic stress relaxation testing machine. The machine adopts MaxTest standard module software system to automatically control the closed-loop of stress, deformation and displacement. At the same time, in the machine design three-claw clamp was used to prevent slipping and structural mechanics calculation was carried out to guar