Abstract:The mathematical model and numerical simulations of the liquid steel flow in a tundish are presented in this paper. The problem was treated as a complex and solved by the finite element method. One takes into consideration in the mathematical model the changes of thermophysical parameters depending on the temperature. The single-strand tundish is used to casting slabs. The internal work space of the tundish was modified by flow control devices. The first device was a pour pad situated in the pouring tundish zo… Show more
“…Variables with temperature thermo-physical properties and properties such as: laser beam power Q = 3.2 kW, welding speed v = 1.0 m/min, the beam radius r 0 = 1 mm, depth penetration s = 7 mm were used in numerical calculations. The analysis of thermal phenomena is made on the basis of the numerical solution of energy conservation equation together with Fourier law [12][13][14][15] using finite element method (FEM). The temperature field expressed in the criterion of weighted residuals method is described by the following equation:…”
Section: Exemplary Of Prediction Of Mechanical Properties In Welded Jmentioning
The numerical analysis of laser welding process with consideration analytical methods determining phase transformations and mechanical properties of welded joints are presents in this paper. The analytical CCT diagram and final structural composition of S355 steel are presented. The empirical relations presents in paper are determined by chemical compositions investigated steel and cooling rate between temperatures 800-500°C (t8/5). Phase composition and mechanical properties each of structures of steel in weld and heat affected zone (HAZ) are determined on the basis of analytical methods. Laser welded flat is used in numerical simulations in ABAQUS. Mathematical modes of volumetric welding source are used in the calculations. Temperature fields, shape and size of melting zone for selected points in the cross-section of the joint are determined on the basis of thermal cycles obtained numerical.
“…Variables with temperature thermo-physical properties and properties such as: laser beam power Q = 3.2 kW, welding speed v = 1.0 m/min, the beam radius r 0 = 1 mm, depth penetration s = 7 mm were used in numerical calculations. The analysis of thermal phenomena is made on the basis of the numerical solution of energy conservation equation together with Fourier law [12][13][14][15] using finite element method (FEM). The temperature field expressed in the criterion of weighted residuals method is described by the following equation:…”
Section: Exemplary Of Prediction Of Mechanical Properties In Welded Jmentioning
The numerical analysis of laser welding process with consideration analytical methods determining phase transformations and mechanical properties of welded joints are presents in this paper. The analytical CCT diagram and final structural composition of S355 steel are presented. The empirical relations presents in paper are determined by chemical compositions investigated steel and cooling rate between temperatures 800-500°C (t8/5). Phase composition and mechanical properties each of structures of steel in weld and heat affected zone (HAZ) are determined on the basis of analytical methods. Laser welded flat is used in numerical simulations in ABAQUS. Mathematical modes of volumetric welding source are used in the calculations. Temperature fields, shape and size of melting zone for selected points in the cross-section of the joint are determined on the basis of thermal cycles obtained numerical.
“…Using relations (7) in equations (6) and then inserting the stress components into equilibrium equations (2), the following equations are obtained:…”
Section: Fig 1 Scheme Of the Problemmentioning
confidence: 99%
“…For example the mathematical description of the considered phenomenon is required in the numerical analysis of the solidification in the mold [4,5]. Currently many advanced numerical methods such as the FEM are used to model complex mechanical phenomena [6][7][8][9]. Numerical investigations based on the FEM in the case of air gap formation process during solidification of pure metal was discussed in [10].…”
The method of numerical modeling of heat transfer between three-dimensional objects being in contact is described in the paper. Presented approach is based on the finite element method (FEM) with independent spatial discretization of considered regions. The gap between external surfaces of the interacting objects has variable width and is filled with gas or liquid. The medium in the gap introduces thermal resistance into heat transfer process. The mathematical model of considered problem is based on the equation of heat diffusion supplemented by the appropriate initial and boundary conditions. The deformations of the regions resulting from the thermally dependent changes of their volumes are also included in the model. The results of numerical simulations are presented and discussed.
“…and boundary conditions of Dirichlet and Neumann type. Newton type condition with the heat loss due to convection, radiation and evaporation [16].…”
Section: Analysis Of Thermal Phenomanamentioning
confidence: 99%
“…The heat flow at the interface between the two bonded elements is described by the Fourier law taking account of the contact resistance r s . Applying the fourth type of boundary condition causes continuity of temperature distribution and heat flux [16]. The scheme of the considered system is shown in Figure 2.…”
Laser welding technology is applied to many types of welded joints. The determination of the influence of technological parameters on the properties of resulting joint is a significant problem for technologists. Numerical estimation of the shape of the weld and its deformation is important in the initial stage of construction design. The paper concerns computer analysis of thermal and mechanical phenomena in laser welded lap joint made of austenitic steel. Three dimensional discrete model of analyzed lap joint is created in Abaqus FEA engineering software. Numerical analysis takes into account temperature dependent thermomechanical properties of austenitic steel. The movable heat source power distribution is modelled using Gaussian distribution. Computational model takes into account the gap between the joined plates. Temperature distribution in analysed joints is presented on the basis of performed numerical simulations. The shape and size of the fusion zone as well as deformation of the joint are estimated.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.