Passenger Car Frontal Barrier Simulation Using Nonlinear Finite Element Methods

1987 ◽  
Author(s):  
Donald A. Vander Lugt ◽  
Roger J. Chen ◽  
Ashok S. Deshpande
Keyword(s):  
Finite Element ◽  
Finite Element Methods ◽  
Nonlinear Finite Element ◽  
Passenger Car ◽  
Nonlinear Finite Element Methods

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.

scholarly journals Inverse Nonlinear Finite Element Methods for Surgery Simulation and Image Guidance

2008 ◽  
Author(s):  
Philip Pratt
Keyword(s):  
Finite Element ◽  
Finite Element Methods ◽  
Equations Of Motion ◽  
Nonlinear Finite Element ◽  
Weighted Sums ◽  
Global Coordinate System ◽  
Surgery Simulation ◽  
Explicit Integration ◽  
Time Step ◽  
Nonlinear Finite Element Methods

Nonlinear finite element methods are described in which cyclic organ motion is implied from 4D scan data. The equations of motion corresponding to an explicit integration of the total Lagrangian formulation are reversed, such that the sequence of node forces which produces known changes in displacement is recovered. The forces are resolved from the global coordinate system into systems local to each element, and at every simulation time step are expressed as weighted sums of edge vectors. In the presence of large deformations and rotations, this facilitates the combination of external forces, such as tool-tissue interactions, and also positional constraints. Applications in the areas of surgery simulation and minimally invasive robotic interventions are discussed, and the methods are illustrated using CT images of a pneumatically-operated beating heart phantom.

Study on Punching Resistance of Slab-Column Nodes Strengthened with CFRP Sheets by Nonlinear Finite Element Methods

2014 ◽  
Vol 578-579 ◽  
pp. 1347-1352
Author(s):  
Xiao Hua Yang ◽  
Zhi Qing Yang ◽  
Fang Wu Wu ◽  
Xing Liu
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Methods ◽  
Shear Failure ◽  
Failure Process ◽  
Nonlinear Finite Element ◽  
Reinforcement Structure ◽  
Cfrp Sheets ◽  
Nonlinear Finite Element Methods ◽  
Stress States

During punching shear failure process, the stress states near slab-column node are complex and nonlinear characters of reinforced concrete make the problems more complicated. In this paper, by considering nonlinear characters of reinforced concrete, punching carrying capacities of slab-column nodes are to analyze by using nonlinear finite element methods, and then the reasonable reinforcement schemes at slab-column nodes have been determined. The slab-column nodes are strengthened by using CFRP sheets. Compare punching bearing capacities of nodes in reinforcement structure with that in unreinforcement structure, the results show that this strengthened method can effectively improve punching resistance bearing capacities of slab-column nodes.

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