力学实验的声发射损伤监控和材料损伤演变  

Damage Evolvement and Acoustic Emission Inspection Test in Mechanical Properties

作　　者：包亦望[1] 邱岩[1] 万德田[1] 田莉[1] 

机构地区：[1]中国建筑材料科学研究总院绿色建材国家重点实验室,北京100024

出　　处：《硅酸盐通报》2010年第3期503-506,共4页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金项目(No.50672093;50772103);北京市自然科学基金项目(No.2082026);北京市科委项目(D08050303450803);"863"项目(2007AA03Z526);"973"项目(2009CB623103)

摘　　要：针对无机材料和复合材料的受力或变形过程中发生损伤的时间和对应载荷无法确定的难题,提出将声发射与万能材料试验机有机结合,形成一种能准确监控加载过程中损伤起始和演变的实验技术和装置。这种方法在夹层玻璃的弯曲实验和球压法测试脆性材料局部强度实验中取得了良好的效果,准确得到了发生损伤的临界载荷和反映损伤过程的载荷-声发射图。该技术对检测和预测材料的疲劳性能和失效有重要意义。A test system with new test technique was developed to monitor the damage initiation and evolution in loading process.The system was organically integrated by universal testing machine and acoustic emission sensor.It is expected to determine the corresponding load at the damage initiation during the loading and deformation process for the composite material and inorganic materials.Good results have been achieved in the bending test of the laminated glass and in the local strength test of the brittle material by Hertz indentation.The curve of load vs acoustic emission can be obtained accurately and represents the critical load at the moment of damage initiation.The technique is important and useful to detect and predict the fatigue properties and failure of materials.

关 键 词：声发射 损伤演变 临界载荷 疲劳性能 

分 类 号：O341[理学—固体力学]