Improved Scheme of Analysis and Stress Computation in Lap Welded Joints With Fillet Welds Tranverselly and Longitudinally Loaded

2005 ◽  
Author(s):  
Rafael Goytisolo ◽  
Hernan Hernandez ◽  
Jorge Moya ◽  
Inga M. Jackson
Keyword(s):  
Finite Elements ◽  
Welded Joints ◽  
Lap Joints ◽  
Fillet Welds ◽  
Finite Elements Analysis ◽  
Stress Calculation ◽  
Stress Computation ◽  
Better Than

In this paper, a new scheme of analysis is used for the stress calculation in the throat area of the weld in lap joints with fillet welds transversely and longitudinally loaded. New calculation expressions are obtained that belong together better than the classic expressions with relationship to the values obtained by the Finite Elements Analysis.

New Expressions for Fillet Weld Torsion Shear Stresses Calculation

2005 ◽  
Author(s):  
Rafael Goytisolo ◽  
Hernan Hernandez ◽  
Jorge Moya ◽  
Inga M. Jackson
Keyword(s):  
Shear Stress ◽  
Finite Elements ◽  
Fracture Mechanics ◽  
Welded Joints ◽  
Shear Stresses ◽  
Fillet Weld ◽  
Engineering Construction ◽  
Weld Joints ◽  
Thin Walls ◽  
Better Than

The fillet welds are conventionally calculated to shear stress in the weakest section: the throat area of the weld. This consideration is a simplification for any fillet weld. Nevertheless, this procedure is internationally accepted as a justified procedure, mainly, for the simplification that makes the calculation of the welded joints of an engineering construction an easy procedure. This premise has motivated that different authors try to obtain calculation expressions for different cases that are presented in the practice, looking to facilitate the work of the industry technicians and engineers in charge of carrying out the calculation of these unions, however, in this pawn they don’t always use the most appropriate methods settled down by the Mechanics of the Materials introducing inaccuracies in these expressions. The Fracture Mechanics has outlined a new necessity: the development of methods of predicting defects that could exist in the welding cords. In order to do that, it is required to determine the stresses that arise in the welding with a superior accuracy. In this paper, the Theory of the Torsion of Thin Walls Profiles is applied to the calculation of the torsion shear stresses of the fillet weld joints. New calculation expressions are obtained that belong together better than the classic expressions with relationship to the values obtained by the Finite Elements Method.

Structural Design and Analysis of a Steel Vine Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 268-273
Author(s):  
Hao Yu Zhang ◽  
Wei Zhou ◽  
Bing Gao
Keyword(s):  
Finite Elements ◽  
Welded Joints ◽  
Structural Design ◽  
Mechanical Performance ◽  
Internal Force ◽  
Functional Requirement ◽  
Force Analysis ◽  
Finite Elements Analysis ◽  
Structure Scheme ◽  
Structured System

A steel footbridge with a 27m net span, a worm-shaped curve and a vine bridge style was proposed to be constructed in Diexi city of Sichuan, China. Considering the appearance and the functional requirement, the bridge is designed as follows: the section outline is composed of 21 different ellipse-shaped transverse ribs with 1.5m spacing, and the transverse ribs are connected by 12 longitudinal ribs. Comparison between two optional structure schemes is carried out. Considering the mechanical performance and economy, the structure scheme, a truss structured system at lower part of the bridge, is adopted. Internal force analysis, member design and deformation calculation of the structure are accomplished. Finite elements analysis with ANSYS shows that the welded joints can meet the bearing capacity requirement. Connection between the bridge and the foundation platform is also presented in this paper.

A SPLINES BASED METHOD FOR MODELING THE HUMAN HEAD FOR USE IN FINITE ELEMENTS ANALYSIS

2017 ◽  
Author(s):  
Daniel Ponce ◽  
Eduardo Szpoganicz ◽  
Leonardo Mejia Rincon ◽  
Ernesto Ponce Lopez
Keyword(s):  
Finite Elements ◽  
Human Head ◽  
Finite Elements Analysis

An Evolutionary Multi-Objective Optimization Approach to the Topology Optimization of Auxetic Structures

2002 ◽  
Author(s):  
Ashraf O. Nassef
Keyword(s):  
Topology Optimization ◽  
Elastic Modulus ◽  
Finite Elements ◽  
Multiobjective Optimization ◽  
Poisson Ratio ◽  
Optimization Approach ◽  
Multi Objective Optimization ◽  
Finite Elements Analysis ◽  
Multi Objective ◽  
Auxetic Structures

Auxetic structures are ones, which exhibit an in-plane negative Poisson ratio behavior. Such structures can be obtained by specially designed honeycombs or by specially designed composites. The design of such honeycombs and composites has been tackled using a combination of optimization and finite elements analysis. Since, there is a tradeoff between the Poisson ratio of such structures and their elastic modulus, it might not be possible to attain a desired value for both properties simultaneously. The presented work approaches the problem using evolutionary multiobjective optimization to produce several designs rather than one. The algorithm provides the designs that lie on the tradeoff frontier between both properties.

scholarly journals Prediction of Cyclic Fatigue Life of Nickel-Titanium Rotary Files by Virtual Modeling and Finite Elements Analysis

2015 ◽  
Vol 41 (11) ◽  
pp. 1867-1870 ◽  
Author(s):  
Alessandro Scattina ◽  
Mario Alovisi ◽  
Davide Salvatore Paolino ◽  
Damiano Pasqualini ◽  
Nicola Scotti ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Finite Elements ◽  
Cyclic Fatigue ◽  
Nickel Titanium ◽  
Finite Elements Analysis ◽  
Virtual Modeling
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