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Mechanical Engineering Commons

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1983

Engineering science and mechanics

Articles 1 - 2 of 2

Full-Text Articles in Mechanical Engineering

Modeling Techniques In Metal Forming: Upsetting Of A Forged Plastic Ring , Hsien-Yung Lee Jan 1983

Modeling Techniques In Metal Forming: Upsetting Of A Forged Plastic Ring , Hsien-Yung Lee

Retrospective Theses and Dissertations

Numerical studies of a plastic ring in axial compression were made using the method of finite element. Standard rings with geometry 6:3:2 (outside diameter:inside diameter:height) were compressed to 8% and 16% deformations with sticking friction for both loaded and unloaded situations;An elastic-plastic finite element program was developed incorporating several different modeling considerations. Special attentions were paid to elastic unloading, modified von Mises yield criterion and large deformation in order to simulate a corresponding plastic model of material 'Rigid Laminac' correctly;The material 'Rigid Laminac' has a higher elastic strain than ordinary metal such as aluminum ...


Development Of The Linear Displacement Discontinuity Method , Mahmoud C. Assaad Jan 1983

Development Of The Linear Displacement Discontinuity Method , Mahmoud C. Assaad

Retrospective Theses and Dissertations

The displacement discontinuity method is reviewed as a numerical technique for computing stresses and displacements distribution over a plane area in a homogeneous, isotropic, linearly elastic material. The elementary solution for a single line crack in an infinite body is derived. The displacement function over the line segment is assumed to be linear of the form ax + b, where a and b are functions of the displacement at the extreme nodes of the line segment. The numerical technique used to overcome the indefinite values of the analytical solution at the singular node points is explained. The problem of a pressurized ...