A Novel Tool Path Strategy for Modelling Complicated Perpendicular Curved Movements

2019 ◽  
Vol 796 ◽  
pp. 164-174 ◽  
Author(s):  
Bahman Meyghani ◽  
Mokhtar Awang
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Tool Path ◽  
Cnc Machining ◽  
Process Time ◽  
Efficient Tool ◽  
Element Modelling ◽  
Friction Stir ◽  
Tool Paths

Curved surfaces have been widely used in engineering applications such as friction stir welding (FSW), 5 axis CNC machining, and other processes. Therefore, the development of the finite element modelling of the complicated geometries has created a need to determine efficient tool paths. Previous finite element models modelled the single point movement of the tool. However, in industrial applications such as aerospace, mould and die, etc. the movement of the tool is complex. Proper determination of the tool path can lead to substantial savings of the process time, improvement of the workpiece surface quality and the improvement of the tool life, thereby leading to overall cost reduction and higher productivity. This paper presents a new approach for the determination of efficient tool paths in finite element modelling by using ABAQUS® software. VDISP user defined subroutine is used in order to define the complex curved movement of the tool. The results indicate that the method is appropriate for modelling of the tool path, and the tool always has a perpendicular position to the surface. Therefore, the method can be suitable for increasing the application of the finite element modelling in various industries.

scholarly journals ROTATIONAL STIFFNESS DETERMINATION OF THE SEMI-RIGID TIMBER-STEEL CONNECTION

2017 ◽  
Vol 23 (8) ◽  
pp. 1021-1028
Author(s):  
Tomas GEČYS ◽  
Alfonsas DANIŪNAS
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Bending Moment ◽  
Steel Structures ◽  
Rotational Stiffness ◽  
Element Modelling ◽  
Component Method ◽  
Steel Connection ◽  
Timber Connections

In this research, the component method implementation for determination of the rotational stiffness of timber-steel connection is shown. Component method is one of the most commonly used methods for determination of the bending moment-rotation relation which later may be used in the practical analysis of the connection. The component method is not widely used for the analysis of the semi-rigid timber connections. There are only several investigations previously done on the component method implementation for the timber connections and most of them are based on only one basic component, i.e. timber compression or glued-in steel rod in tension. This article presents a new investigation of rotational stiffness determination algorithm of the semi-rigid timber-steel connection, which is based on the component method. The component method’s mechanical model of the connection combines all components which have influence on the rotational stiffness of the connection. The analysed timber-steel connection is subjected to pure bending. Stiffness coefficients of the steel part components are determined according to the Eurocode 3: design of steel structures Part 1-8: Design of joints. The timber part components are derived from the full-scale laboratory experiments and finite element modelling results, presented in the previous publications of the authors. The presented rotational stiffness determination results are well in line with the experimental and finite element modelling results, published in the previous publications.

Effect of Laminates Orientation on Impact Properties of Fiberglass and Kevlar Composite Panels

2015 ◽  
Vol 808 ◽  
pp. 119-124
Author(s):  
Emilian Ionut Croitoru ◽  
Gheorghe Oancea
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Composite Panel ◽  
Left Wing ◽  
Stress Variation ◽  
Impact Properties ◽  
Element Modelling ◽  
Loading Case ◽  
Multiple Configurations

This paper presents the study of the effect of laminates angle on impact properties of a composite panel made of glass and Kevlar fibers using finite element modelling. In this research, the composite panel consists of a skin panel, specifically the front left wing, from an automotive vehicle having multiple configurations. A distributed pressure on the composite package represents the loading on the selected panel modelled as one uniform distributed abuse loading case and the stress variation within the composite panel for each configuration is determined. The results of these analyses are used for the determination of mathematical models for tensions, longitudinal and shear tensions, as functions of laminate angle for each configuration.

Determination of Ultimate Filling Height of Slag Subgrade with FEM Modelling

2012 ◽  
Vol 188 ◽  
pp. 84-89 ◽  
Author(s):  
Bing Gen Zhan ◽  
Yi Dong Ruan ◽  
Ding Han
Keyword(s):  
Finite Element ◽  
Constitutive Model ◽  
Creep Test ◽  
Finite Element Modelling ◽  
Differential Settlement ◽  
Element Modelling ◽  
Filling Height ◽  
Pavement Structures ◽  
Surface Increase

To use slag in high subgrade reasonably and effectively, the filling height limit was investigated. The viscoelasticity parameters of slag in a ascertain graduation were gained by viscoelasticity constitutive model and indoor creep test. The differential settlement values (DSV) of subgrade surface at various filling heights were obtained by the finite element modelling. The research results show that the DSVs on subgrade surface increase with the filling height. According to the effects of DSV on pavement structures, four grades of differential settlement from low to high were divided, the ultimate filling heights of slag were evaluated correspondingly.

Finite Element Modelling of Temperature Distribution in Friction Stir Welding Process and Its Influence on Distortion of Copper Canisters

2004 ◽  
Vol 824 ◽  
Author(s):  
Therese Källgren ◽  
Lai-Zhe Jin ◽  
Rolf Sandström
Keyword(s):  
Finite Element ◽  
Friction Stir Welding ◽  
Temperature Distribution ◽  
Welding Speed ◽  
Material Flow ◽  
Finite Element Modelling ◽  
Welding Process ◽  
Element Modelling ◽  
Friction Stir ◽  
Friction Stir Welding Process

AbstractIn an effort to enhance safety for long time disposal of waste nuclear fuel, friction stir welding has been developed as one alternative to seal copper canisters. To avoid the formation of voids and cracks during the welding process, an understanding of the heat and material flow andthereby the evolution of the microstructure, is of great importance. Finite element modelling has been used to simulate the heat and material flow as well as thermal expansion during the friction stir welding process. A model involving heat transfer, material flow, and continuum mechanics has been developed. The steady state solutions have been compared with experimental temperature observations as well as analytical solutions, showing good agreement. Temperature distribution is affected by the welding speed. For a given reference pointperpendicular to the welding direction, a lower welding speed corresponds to a higher peak temperature. The plunging position of welding tool influences the temperature distribution and therefore the displacement distribution of the weldment.

Compression of elastic–perfectly plastic microcapsules using micromanipulation and finite element modelling: Determination of the yield stress

2011 ◽  
Vol 66 (9) ◽  
pp. 1835-1843 ◽  
Author(s):  
Ruben Mercadé-Prieto ◽  
Rachael Allen ◽  
David York ◽  
Jon A. Preece ◽  
Ted E. Goodwin ◽  
...  
Keyword(s):  
Finite Element ◽  
Yield Stress ◽  
Finite Element Modelling ◽  
Element Modelling ◽  
Perfectly Plastic ◽  
Elastic Perfectly Plastic
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