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.

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.

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.

scholarly journals Finite element modelling of steel-caged RC columns subjected to axial force and bending moment

2012 ◽  
Vol 40 ◽  
pp. 168-186 ◽  
Author(s):  
Julio Garzón-Roca ◽  
Jose M. Adam ◽  
Pedro A. Calderón ◽  
Isabel B. Valente
Keyword(s):  
Finite Element ◽  
Axial Force ◽  
Finite Element Modelling ◽  
Bending Moment ◽  
Rc Columns ◽  
Element Modelling

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

scholarly journals Analysis and Finite Element Modelling of Water Flow in Concrete

2018 ◽  
Author(s):  
Miklós Pap ◽  
András Mahler ◽  
Salem Georges Nehme
Keyword(s):  
Finite Element ◽  
Water Flow ◽  
Finite Element Modelling ◽  
Water Retention ◽  
Soil Mechanics ◽  
Water Retention Curve ◽  
Depth Of Penetration ◽  
Retention Curve ◽  
Element Modelling

Due to the construction of underground structures and hazardous waste storages, understanding and modelling of seepage in concrete has become an important issue in life-span analyses. The theories and calculation methods of unsaturated soil mechanics provide an opportunity to analyze water flow in other types of porous media (e.g. concrete) as well. This study deals with the determination of the permeability for unsaturated and saturated concrete and modelling the water flow in concrete. The direct measurement of the saturated permeability, the preparation of the drying water retention curve and determination of the depth of penetration of water under pressure are involved in the series of tests. For the fitting method of the experimental water retention curves were used Fredlund and Xing (1994) and van Genuchten (1980) model. The theory of lateral shift was applied to estimate the wetting water retention curve from the drying WRC. Thus, we could calculate the unsaturated permeability functions with Fredlund et al. (1994) and van Genuchten (1980) model. The finite element modelling of the standard test for watertightness were performed with Midas GTS using the measured and calculated unsaturated property functions.

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