Unstable Fracture Pattern Recognition in Q345B Steel Based on Acoustic Emission
-
摘要: 研究了一种基于声发射技术的Q345B钢材进入失稳断裂模式的识别方法。其以声发射计数率作为研究的数据对象，利用数理统计学分析计数率数据变化的规律，提出了用声发射计数率的离散系数对疲劳裂纹扩展过程的第二阶段与第三阶段进行识别，建立了Q345B钢材声发射计数率的离散系数与应力强度因子幅值的关系，可为利用声发射技术作为Q345B钢材失稳断裂预警识别提供依据。Abstract: Studies on the instability fault pattern recognition method based on acoustic emission technology in Q345B steel were under taken. The method is based on the acoustic emission counting rate which is as the data object. It uses the mathematical statistics to analyze the law of the change of the count rate data and advances that the second and third stages of the fatigue crack propagation process are identified by the discrete coefficients of the acoustic emission count rate. It also provides the relationship between the discrete coefficient of the Q345B steel acoustic emission rate and the amplitude of the stress intensity factor. The relationship can provide the basis for the identification of Q345B steel instability fracture pattern by using acoustic emission.
-
Keywords:
- Q345B steel /
- acoustic emission /
- discrete coefficient /
- pattern recognition
-
-
[1] SMITH T A, WARWICK R G. A survey of defects in pressure vessel built to high standard of construction[J]. International Journal of Pressure Vessels & Piping,1974,2(4):283-287.
[2] SHEN G T, ZHANG W L. A review of nondestructive testing technique for pressure vessels[J].Nondestructive Testing,2004,26(1):37-41.
[3] PARIS P, ERDOGAN F A. Critical analysis of crack growth laws[J].Journa lof Basic Engineering, Transaction ASTM (Series), 1963,85(3):528-534.
[4] 冷亚波.金属材料疲劳损伤的声发射特性研究[D].南昌:南昌大学,2013. [5] 柴孟瑜,段权,张早校.Q345R疲劳裂纹扩展过程的声发射研究[J].工程科学学报,2015,37(12):1588-1593. [6] 王慧晶.基于声发射参数的材料疲劳断裂研究[D].大连:大连理工大学,2013. [7] 汪文有,孔德连,许凤旌.钢结构疲劳损伤声发射检测[J].无损检测,2013,35(11):67-71. [8] 李元辉,袁瑞甫,赵兴东. 岩石受载记忆的声发射实验研究[J].辽宁工程技术大学学报,2006,8(25):518-520. [9] GB/T 6398-2000金属材料疲劳裂纹扩展速率试验方法[S]. [10] MORTON T M, SMITH S, HARRINGTON R M. Effect of loading variables on the acoustic emissions of fatigue crack growth[J]. Experimental Mechanics, 1974, 14(5):208-213.
[11] MⅡNSHION H, LIANG J, PETER K, et al. Using acoustic emission in fatigue and fracture materials research[J].JOME, 1998, 11:50-55.
[12] 龙小江.钢材损伤过程声发射检测与评价方法研究[D].南昌:南昌航空大学,2015. [13] 张行.断裂与损伤力学[M].北京:北京航天航空大学出版社,2006. [14] 赫松林,陈铸曾.损伤及损伤力学[J].国防科技大学学报,2004,6(2):10-13. [15] 余寿文,冯西桥.损伤力学[M].北京:清华大学出版社,1997. [16] 王振京.基于声发射技术的Q345B疲劳裂纹扩展研究[D].南昌:南昌航空大学,2017.
计量
- 文章访问数: 1
- HTML全文浏览量: 0
- PDF下载量: 1
下载:
