Set of New Microcomputer Aided System for Comprehensively Measuring FCG
-
摘要: 在对数据处理和变载技术研究的基础上,采用C+ +编程,在X86系列微机上建立了一套新的功能先进的计算机辅助疲劳裂纹扩展速率综合测试、处理与分析系统.与其它系统相比,该系统在测试精度、信息获取、试验周期等方面大大改进,可进行恒ΔP法、恒ΔK法以及降ΔK升ΔK法等多种载荷与应力强度因子幅的控制试验,并在腐蚀疲劳裂纹扩展测试中得到成功应用,说明该系统测试有效,功能可靠.Abstract: A set of new computer aided system(CAS)programmed by C+ + and developed on X86 series microcomputer for comprehensively measuring crack growth rate is briefly introduced and some part of algorithms for data process and the selection technique of load-variation are given.The CAS mentioned above can be applied to tests with different range of load ΔP and range of stress intensity factor ΔK such as constant ΔP method,constant ΔK method as well as decreasing ΔK and increasing ΔK method.Compared with other systems,the new systems can increase the measurement accuracy,shorten testing time and obtain more information. It has been successfully used in measuring corrosion fatigue crack growth rate,which shows that the system is effective in measurement and reliable in function.
-
Key words:
- crack propagation /
- computer-aided test /
- corrosion fatigue
-
[1] Abbott K R,Doig P A.Microcomputer control system for the measurement of fatigue crack growth data[J].Eng Fract Mech,1986,23(6):965~976． [2]Donald J K,Schmidt D W.Computer controlled stress intensity gradient technique for high rate fatigue crack growth testing[J].J Test Evalu,1980,8(1):19~24． [3]路民旭,姜伟之,王春生.Apple-Ⅱ疲劳裂纹扩展数据采集与处理系统[J].数据采集与处理,1988,3(2):34~44． [4]刘晓坤,王建军,路民旭.用边界元法进行紧凑拉伸试样电位场标定[J].强度与环境,1988,41(2):50~55． [5]路民旭.超高强度钢腐蚀疲劳特性综合研究 .西安:西北工业大学材料科学与工程系,1992． [6]Nakai Y,Tanaka K,Wei R P.Growth of short fatigue cracks in HY-130 steel in 3.5%NaCl solution[J].Eng Fract Mech,1985,21(2):293~305． -
点击查看大图
计量
- 文章访问数: 2242
- HTML全文浏览量: 117
- PDF下载量: 1091
- 被引次数: 0
下载:
