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Full-Text Articles in Engineering
An Implementation Of The Regularized Extended Finite Element Method In Abaqus, Yu-Jui Liang
An Implementation Of The Regularized Extended Finite Element Method In Abaqus, Yu-Jui Liang
Mechanical and Aerospace Engineering Dissertations
The Regularized eXtended Finite Element Method (Rx-FEM) methodology is a discrete damage modeling (DDM) technique, which represents an approach to the progressive damage analysis (PDA) in laminated composites when multiple damage events such as matrix cracks and delamination are introduced into the model via the displacement discontinuities. In the Rx-FEM, the Heaviside step function that is typically used to introduce a displacement discontinuity across a crack surface in the eXtended Finite Element Method (x-FEM) is replaced by a continuous function approximated by using the finite element (FE) shape functions. This regularization offers unique possibility for the implementation of the Rx-FEM …
Evaluation Of The Structural Performance Of Bridge Mse Retaining Walls, Zaid Sm Momani
Evaluation Of The Structural Performance Of Bridge Mse Retaining Walls, Zaid Sm Momani
Civil Engineering Dissertations
Mechanically Stabilized Earth (MSE) walls have been used extensively since the first MSE wall constructed in California in the early 70’s. MSE walls proved that they are reliable, cost-effective, aesthetically pleasing, and easily constructible. However, the design criteria of an MSE wall does not always incorporate the comprehensive behavior. A reasonable number of MSE walls do not perform as expected; a few experienced catastrophic failure. The current study was inspired by multiple MSE walls showing excessive movement of the precast panels in Fort Worth and Hurst, Texas. Three most critical MSE walls were selected for this study. The main focus …
Application Of Random Geometric Imperfection Method To Nonlinear Buckling Analysis Of Spherical Shell, Zhixin Xiong, Zhiquan Huang, Xiaochuan Yu
Application Of Random Geometric Imperfection Method To Nonlinear Buckling Analysis Of Spherical Shell, Zhixin Xiong, Zhiquan Huang, Xiaochuan Yu
Journal of Marine Science and Technology
This paper focuses on spherical shells with random geometric imperfections under uniform external pressure. An extensive numerical investigation is performed to calculate the buckling loads of perfect and imperfect spherical shells. To discuss the effects of initial geometric imperfections, a finite element analysis model of the perfect spherical shell is considered to obtain its first 60 modes. Then, the consistent imperfect buckling analysis method is applied to analyze the nonlinear stability of the spherical shells with geometric imperfections. The shapes of the shell in the 1st to 20th eigenmode are considered. A lower buckling load is found corresponding to the …