Applied Solid Mechanics
The target of our research is deformation, damage and fracture of various practical materials, including metallic and polymeric materials. We conduct experimental observations of nonuniform deformations for the materials and the corresponding numerical simulations in various levels.
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Pure titanium has a hexagonal closed-pack structure with anisotropic elasticity and plasticity, and is polycrystalline aggregate with different crystal orientations. A specimen of commercial pure titanium is subjected to a tensile test on the stage of a digital holographic microscope, and the microscopic inhomogeneous deformation of grains under elastic and plastic conditions are observed and measured.
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Most machine parts are made by using plastic deformation (plastic working). The plastic deformation is affected by the crystal structure of the metal. The goal of our study is to realize an analysis describing the plastic deformation with high precision.
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Study on slip deformation in metals: Tensile and fatigue fractures of metallic materials are usually caused by slip deformation. Therefore, we investigate fracture mechanisms of metallic materials focusing on the slip deformation.