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Experimental and Numerical Analysis of Some Interfacial Mechanics Problems in Dissimilar Materials

Author: LiXingMin
Tutor: LeiZhenKun
School: Dalian University of Technology
Course: Applied and Experimental Mechanics
Keywords: Combination of materials Stress transfer Stress intensity factor Digital photoelasticity
CLC: O346.1
Type: Master's thesis
Year: 2010
Downloads: 113
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Abstract


With the development of science and technology , more and more new materials are gradually replacing traditional materials used in engineering , such as resin-based composite materials , coating materials , sandwich materials . From different materials by a combination of new materials are collectively referred to as the bonding material. Interfacial layer combination of materials due to the differences in the physical properties of materials , there is often a complex mechanical problems . The combination of engineering materials prone to bonding interface shear failure caused early damage of the material , which requires the detailed study of binding material bonding interface shear transfer behavior . In addition, the combination of materials interface edge interface crack tip are there different forms of stress singularity , causing damage often starting at the interface end or interface crack tip . Analysis of the mechanical behavior of traditional materials and evaluation methods are no longer suitable for the combination of materials . To create a new evaluation method of mechanical behavior must -depth study of these issues . In this paper, the combination of materials bonded interface a number of mechanical problems , the research work mainly in the following aspects: ( 1 ) Al / Epoxy adhesive structure of heterogeneous materials audience shear stress measurement through digital photoelastic method , the binding material bonding interface stress transfer behavior of in-depth analysis and finite element analysis verification . (2) based on the combination of the material interface edge singular stress field equations , using the the digital photoelastic method analysis of the different stress singularity at the interface edge stress intensity factor , verify the experimental and finite element results . (3) the use of non-linear least squares method on the basis of the digital photoelastic determine Ⅰ / Ⅱ hybrid interface crack stress intensity factor , given the mixed mode crack simulation and experimental verification , and discuss the sources of error . To solve these problems , respectively numerical calculation validation , and analysis of experimental error .

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CLC: > Mathematical sciences and chemical > Mechanics > Solid Mechanics > Strength theory > Fracture theory
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