Assessment of interface deformation and fracture in metal matrix composites under transverse loading conditions
Assessment of interface deformation and fracture in metal matrix composites under transverse loading conditions
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DOI：
10.1163/156855408785971335
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发表时间：
2008-01-01
影响因子：
2.6
通讯作者：
Matikas, Theodore E.
中科院分区：
文献类型：
--
作者：
Matikas, Theodore E.
单向金属基复合材料的横向性能主要受纤维/基体界面性能、残余应力和基体力学响应的影响。为了原位监测和研究钛基复合材料界面在横向载荷作用下的破坏，研究了超声成像技术。对界面进行超声成像，并监测超声振幅随横向载荷的变化，表明该技术对界面断裂和变形的敏感性。这种振幅的变化已经用超声波的多重反射理论来解释。多重反射理论可以估计界面变形和剥离作为载荷的函数。超声技术还与有限元建模相结合，以量化mmc中纤维/基质界面的原位横向强度。
The transverse properties of unidirectional metal matrix composites (MMCs) are dominated by the fiber/matrix interfacial properties, residual stresses and matrix mechanical response. In order to monitor and study, in situ, the failure of interfaces in titanium-based composites subjected to transverse loading conditions, an ultrasonic imaging technique has been developed. The interface was imaged ultrasonically and the change in ultrasonic amplitude with the transverse loading was monitored, indicating the sensitivity of the technique to fracture and deformation of interfaces. This change in amplitude has been explained in terms of the multiple reflection theory of ultrasonic waves. The multiple reflection theory enabled estimation of the interfacial deformation and debonding as a function of loading. The ultrasonic technique was also used in conjunction with finite element modeling in order to quantify the fiber/matrix interfacial transverse strength in situ in MMCs.