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Micro-experimental study for the stress effects on the interphase of composite materials
Authors:Jinlong Chen  Yuwen Qin  Aibing Yu  Baohui Liu
Institution:Department of Mechanics, Tianjin University, Tianjin 300072, People's Republic of China
Abstract:Digital speckle micro-metrology system, which is a combination of a long-focus microscope and a digital image-measuring device, is developed for studying the micro-mechanics behavior of the interphase of bimaterials. The natural texture of a specimen's surface is thought as a carrier of deformation's information and is analyzed to obtain the displacement field in each step, strain field and their real-time variation of the interphase. The resolution of the micro-metrology system is 10 nm for in-plane displacements. In this paper, the micro-metrology system is employed to investigate the micro-mechanics behavior of the interphase under thermal impulsing. The experimental results show that the interphase is the main factor affecting the mechanical characteristic of the whole composite structure.
Keywords:Digital speckle  Micro-metrology  Interphase  Bimaterials  Thermal impulsing  Subset  Displacement  Strain  Long-focus microscope  Micro-mechanics
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