Nonlinear finite-element semivectorial propagation method for three-dimensional optical waveguides

1999 ◽  
Vol 11 (2) ◽  
pp. 209-211 ◽  
Author(s):  
A. Cucinotta ◽  
S. Selleri ◽  
L. Vincetti
Keyword(s):  
Finite Element ◽  
Optical Waveguides ◽  
Three Dimensional ◽  
Nonlinear Finite Element

Finite Element Simulation of a Strong-Post W-Beam Guardrail System

SIMULATION ◽  
2002 ◽  
Vol 78 (10) ◽  
pp. 587-599 ◽  
Author(s):  
Ali O. Atahan
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Full Scale ◽  
Nonlinear Finite Element ◽  
Crash Test ◽  
Original Design ◽  
Dynamic Interactions ◽  
Crash Testing ◽  
Element Simulation ◽  
Test Requirements

Computer simulation of vehicle collisions has improved significantly over the past decade. With advances in computer technology, nonlinear finite element codes, and material models, full-scale simulation of such complex dynamic interactions is becoming ever more possible. In this study, an explicit three-dimensional nonlinear finite element code, LS-DYNA, is used to demonstrate the capabilities of computer simulations to supplement full-scale crash testing. After a failed crash test on a strong-post guardrail system, LS-DYNA is used to simulate the system, determine the potential problems with the design, and develop an improved system that has the potential to satisfy current crash test requirements. After accurately simulating the response behavior of the full-scale crash test, a second simulation study is performed on the system with improved details. Simulation results indicate that the system performs much better compared to the original design.

Study of Rheological Effects on the Stress and Deformation of the Sand-Gravel-Fill Dam

2014 ◽  
Vol 910 ◽  
pp. 297-303
Author(s):  
Liang Ren ◽  
Yang Li ◽  
Bo Hu ◽  
Min Jiang
Keyword(s):  
Finite Element ◽  
Finite Element Methods ◽  
Three Dimensional ◽  
Nonlinear Finite Element ◽  
Engineering Practice ◽  
Rheological Analysis ◽  
Nonlinear Finite Element Methods ◽  
Stress And Deformation ◽  
Concrete Face

This paper analyses and selects the rheological mechanism and rheological analysis of the sand-gravel-fill dam, and combines with concrete-face sand-gravel-fill dam engineering practice, using three-dimensional nonlinear finite element methods to analyze the rheological effects on stress and deformation of the dam, using two calculation program of considering sand-gravel rheological effects or not. Then analyze and compare the results of the two calculation program, and systematically summarize the rheological effects on stress and deformation of the dam.

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