scholarly journals Numerical simulation of polymer flows using non-conforming finite elements

2013 ◽  
Vol 79 ◽  
pp. 178-189 ◽  
Author(s):  
Julie Joie ◽  
Didier Graebling
Keyword(s):  
Numerical Simulation ◽  
Finite Elements ◽  
Polymer Flows

Numerical Simulation of Friction Stir Welding (FSW) Process Based on ABAQUS Environment

2016 ◽  
Vol 254 ◽  
pp. 272-277
Author(s):  
Monica Iordache ◽  
Claudiu Bădulescu ◽  
Eduard Niţu ◽  
Doina Iacomi
Keyword(s):  
Numerical Simulation ◽  
Friction Stir Welding ◽  
Finite Elements ◽  
Adaptive Mesh ◽  
Experimental Tests ◽  
Arbitrary Lagrangian Eulerian ◽  
Complex Issue ◽  
Friction Stir ◽  
Mechanical Phenomena

. Simulation of the FSW process is a complex issue, as it implies interactions between thermal and mechanical phenomena and the quality of the welding depends on many factors. In order to reduce the time of the experimental tests, which can be long and expensive, numerical simulation of the FSW process has been tried during the last ten years. However, there still remain aspects that cannot be completely simulated. In this paper the authors present the steps of the numerical simulation using the finite elements method, in order to evaluate the boundary conditions of the model and the geometry of the tools by using the Arbitrary Lagrangian Eulerian (ALE) adaptive mesh controls.

scholarly journals Numerical simulation of earth fissures due to groundwater withdrawal

2015 ◽  
Vol 372 ◽  
pp. 395-398 ◽  
Author(s):  
Z. Wang ◽  
Y. Zhang ◽  
J. Wu ◽  
J. Yu ◽  
X. Gong
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Elements ◽  
Groundwater Withdrawal ◽  
Tensile Failure ◽  
Band Model ◽  
Field Observations ◽  
Earth Fissures ◽  
Initiation And Propagation ◽  
Crack Band

Abstract. Excessive groundwater withdrawal can cause land subsidence and earth fissures. The initiation and propagation of earth fissures are related to tensile failure and crack propagation in soils. Based on fracture mechanics, the crack band model (CBM), one of the smear crack models which is relatively easy to construct and convenient to be integrated into standard finite element codes is used in this paper. The calculated results of CBM are less dependent on the sizes of finite elements. The model was applied to simulate the formation and propagation of earth fissures in the hydrostratigraphic units with a bedrock ridge. The simulated positions and patterns of earth fissures coincide with field observations, suggesting that the modeling approach is adept to simulate the initiation and propagation of earth fissures due to groundwater withdrawal.

Structure of Flows in Viscoplastic Fluids Mixing

2002 ◽  
Author(s):  
Fre´de´ric Savreux ◽  
Pascal Jay ◽  
Albert Magnin ◽  
Jean-Michel Piau
Keyword(s):  
Numerical Simulation ◽  
Free Surface ◽  
Finite Elements ◽  
Constitutive Equation ◽  
Power Consumption ◽  
Viscoplastic Fluid ◽  
Two Dimensional ◽  
Cylindrical Tank ◽  
Stream Lines ◽  
Isothermal Mixing

The laminar isothermal mixing of a viscoplastic fluid is considered in the absence of any free surface and when the material can be modelled using a Bingham constitutive equation. The material is mixed by a rotating cylindrical tank and a fixed anchor impeller. A two-dimensional numerical simulation is performed with a finite elements method. The effects of viscoplasticity and inertia are related to an Oldroyd (Od) and to a Reynolds (Re) number. Stream lines, vortices, yield surfaces and power consumption are shown and analysed depending on the value of Od and Re parameters.

Research on the Anti-Penetration Performance of Aluminum Foam Sandwich Plate

2014 ◽  
Vol 624 ◽  
pp. 20-24 ◽  
Author(s):  
Gui Yun Hang ◽  
Wen Li Yu ◽  
Tao Wang ◽  
Jin Tao Wang ◽  
Zhen Li
Keyword(s):  
Numerical Simulation ◽  
Finite Elements ◽  
Dynamic Response ◽  
Direct Effect ◽  
Aluminum Foam ◽  
Sandwich Plate ◽  
Sandwich Structures ◽  
Simulation Method ◽  
Foam Core ◽  
Penetration Process

This paper investigated the anti-penetration performance of different sandwich structures plate using numerical simulation method. Finite elements models of the bullet and sandwich plate were established. The penetration performance of sandwich plate by bullet was simulated by software of LS-DYNA and dynamic response of the bullet during the penetration process was got. The results show that the anti-penetration performance is different because of the different cores in the plate. Besides, the density of the aluminum foam core has a direct effect on the performance. This paper could provide some reference for the designing of sandwich structures.

Research of Seed Levitation Based on Magneto-Archimedes Effect

2010 ◽  
Vol 143-144 ◽  
pp. 949-955
Author(s):  
Shi Peng Li ◽  
Wei Ping Zhang ◽  
Mu Feng Hu ◽  
Wen Yuan Chen ◽  
Feng Cui ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Finite Elements ◽  
Magnetic Characteristics ◽  
Theoretical Derivation ◽  
Diamagnetic Levitation ◽  
Finite Elements Simulation

In this research, the principle of diamagnetic levitation is described briefly. The application perspectives of diamagnetic levitation and its advantages are as well discussed. By utilizing the magneto-Archimedes Effect to lift different seeds, the experimental procedures and parameters are provided which include magnetic characteristics of magnets and ratios of magneto-Archimedes solution. The theoretical derivation and finite elements simulation of force when the seeds suspend are conducted. These resolving formulas, methods of numerical simulation as well as means of experiments are meaningful as reference to the researches in this field.

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