Numerical Simulation of Series Experiments of Concrete Fracture

2011 ◽  
Vol 488-489 ◽  
pp. 270-273
Author(s):  
Ai Min Deng ◽  
Xiang Dong Wang ◽  
Dao Yuan Xu
Keyword(s):  
Numerical Simulation ◽  
Simulation Models ◽  
Simulation Method ◽  
Displacement Curve ◽  
Concrete Fracture ◽  
Ansys Software ◽  
Concrete Element ◽  
Concrete Material ◽  
Linear Characteristic ◽  
Concrete Materials

With progress of the computer technology and numerical simulation method, the numerical simulation of the fracture process of concrete materials has become possible. In this paper, the numerical simulation models of the two types of samples were carried out with the SOLID65 concrete element based on the ANSYS software platform. According to the results, the non-linear characteristic of the concrete material exhibited in the loading process is reflected by the phenomenon that the slope of the later stage shows some reduction in the simulated load - loading point displacement curve. That is to say, the behavior of the appearance and development of cracks can be simulated with SOLID65 concrete element in ANSYS.

scholarly journals Comparing the results of analytical method and numerical simulation method for supersonic flow over main wing of S-125 Neva/Pechora missle

2017 ◽  
Vol 20 (K1) ◽  
pp. 84-90
Author(s):  
Ha Nam Tran ◽  
Ngoc Anh Vu ◽  
Tuan Phuong Nam Le
Keyword(s):  
Numerical Simulation ◽  
Mach Number ◽  
Supersonic Flow ◽  
Analytical Method ◽  
Fluid Dynamic ◽  
Simulation Method ◽  
Turbulent Model ◽  
Ansys Software ◽  
Simulation Process ◽  
Meshing Process

This paper compares the results of Computational Fluid Dynamic (CFD) and analytical method when applying to the case of supersonic flow over main wing of S-125 Neva/Pechora surface-to-air missle. The theory of two-dimensional, steady, inviscid supersonic flow over oblique surface, equations of relations between Mach number, pressure, temperature of flow in front and behind of shock wave, details of MATLAB algorithm and Spalart-Allmaras turbulent model will be displayed in this paper. Meshing process had been done by Meshing module and numerical simulation process had been done by Fluent module of ANSYS software. The results of two methods were presented in graphs of Mach number, pressure, temperature distributions along the chord line of wing. The reasons of differences between two results will be presented at the end of this paper.

Numerical Simulation of Aircraft over Run Arresting System

2013 ◽  
Vol 787 ◽  
pp. 485-489
Author(s):  
Fei Xu ◽  
Ze Tan ◽  
Ya Jie Shi
Keyword(s):  
Numerical Simulation ◽  
Fem Simulation ◽  
Material Model ◽  
Federal Aviation Administration ◽  
Simulation Method ◽  
Thickness Effect ◽  
Foam Concrete ◽  
Fem Model ◽  
Concrete Material ◽  
Static Compression

Engineered Material Arresting System (EMAS) is the specified equipment used to prevent aircraft from overrunning. Based on static compression and impact tests of the foam concrete, material model and parameters in the FEM simulation are determined. Then numerical simulations are performed on FAA(Federal Aviation Administration) aircraft arresting tests. The simplified aircraft arresting FEM model and corresponding simulation method are verified. The thickness effect of the arresting bed is studied.

Development of Numerical Simulation Method for Melt Relocation Behavior in Nuclear Reactors: Validation of Applicability for Actual Core Support Structures

2016 ◽  
Author(s):  
Susumu Yamashita ◽  
Kazuyuki Tokushima ◽  
Masaki Kurata ◽  
Kazuyuki Takase ◽  
Hiroyuki Yoshida
Keyword(s):  
Numerical Simulation ◽  
High Temperature ◽  
Computer Aided Design ◽  
Nuclear Power ◽  
Radiation Heat Transfer ◽  
Three Dimensional ◽  
Simulation Models ◽  
Simulation Method ◽  
Transfer Model ◽  
Simulation Code

In order to precisely investigate molten core relocation behavior in the Fukushima Daiichi nuclear power station, we have developed the detailed and phenomenological numerical simulation code named JUPITER for predicting the molten core behavior including solidification and relocation based on the three-dimensional multiphase thermal-hydraulic simulation models. At the moment, multicomponent analysis method which can be treated any number of component as a fluid or solid body, Zr-water reaction model and simple radiation heat transfer model were implemented and showed that multicomponent melt flow and its solidification were confirmed in the simplified core structure system. However, the validation of the JUPITER using high temperature molten material has not been performed yet. In this paper, in order to evaluate the validity of the JUPITER, especially, for high temperature melt relocation experiment, we compared between numerical and experimental results for that system. As a result, qualitatively reasonable result was obtained. And also we performed melt relocation simulation on actual core structures designed by three dimensional CAD (Computer-Aided Design) and then we estimated phenomena which might be actually occurred in SAs.

The through Arch Rib Road Bridge Numerical Simulation of Blasting Demolition

2014 ◽  
Vol 533 ◽  
pp. 175-180
Author(s):  
En An Chi ◽  
Chun Ming Xie ◽  
Ming Sheng Zhao ◽  
Jun Yang ◽  
Tie Jun Tao
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Simulation Method ◽  
Design Phase ◽  
Important Means ◽  
Simulation Results ◽  
Concrete Materials ◽  
Structure Collapse ◽  
Concrete Model ◽  
Collapse Process

In order to ensure one through arch rib road bridge blasting demolition will go well, using separate common node reinforced concrete model, numerical simulate the process of bridge collapsed and disintegrate, at the same time, analyze the stress state of steel and concrete unit in detail. The simulation results show that separate common node model could reflect the mechanical properties difference of steel and concrete materials; destruction of the support part of bridge and joint parts reserved , meanwhile, blasting treatment of the joint parts of derrick and arches, also arch center derrick and deck beams, arch springing hinge inside pier reserved on the left, it can ensure the bridge collapsed and broken fully, and can reduce the stack height of bridge collapsed in the river. The research considers that researching on structure collapse process by numerical simulation method not only reappear the process of collapse, but also forecast collapse result in schematic design phase. It will become the important means of study the structure mechanics process of blasting demolition and guide assisted the design of structure blasting demolition, which has important engineering practical value.

Development of Numerical Simulation Method for Relocation Behavior of Molten Debris in Nuclear Reactors: 1 — Preliminary Analysis of Relocation of Molten Debris to Lower Plenum

2013 ◽  
Author(s):  
Susumu Yamashita ◽  
Hiroyuki Yoshida ◽  
Kazuyuki Takase
Keyword(s):  
Numerical Simulation ◽  
Solid Phase ◽  
Initial Conditions ◽  
Three Dimensional ◽  
Simulation Models ◽  
Simulation Method ◽  
Melting Behavior ◽  
Hydraulic Simulation ◽  
Numerical Simulation Method ◽  
Two Phases

We developed the numerical simulation method for predicting the melting core behavior including solidification and relocation based on the three-dimensional multi-phase thermal-hydraulic simulation models. In this code, each of gas, liquid and solid phase are treated individually, and interface between two phases are simulated directly. In this paper, the developed code was applied to numerical simulations of the melting behavior of the simulated fuel assemblies and reactor structures. In the simulation, complicated structures in the BWR lower plenum was simply modeled. A decay heat in molten or solidified debris was also considered. Moreover, several different initial conditions were used to check performance of this code and to evaluate adequacy of the present numerical method. From the present numerical results, it was confirmed that relocation of molten debris in the BWR lower plenum can be simulated by the currently developed code including effects of melting and solidification of debris.

RANCANG BANGUN SIMULATOR SISTEM TREATMENT BAHAN BAKAR BIODISEL B20 PADA TANKI INDUK BAHAN BAKAR KRI YOS SUDARSO

ROTOR ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 55
Author(s):  
Hadi Prasutiyon ◽  
Arif Winarno ◽  
Edlyn Criptosan
Keyword(s):  
Diesel Fuel ◽  
Simulation Models ◽  
Simulation Method ◽  
Fuel Tank ◽  
Ansys Software ◽  
Software Simulation ◽  
Circulation Pump ◽  
Before And After ◽  
Main Engine

Biodiesel B20 is a mixture of 80% fossil diesel fuel and 20% biofuel. When using B20, the fuel has problems in the form of jelly or mud deposition, so it needs to be overcome by treatment. The treatment that is used today uses a circulation pump but has shortcomings and is not efficient so it needs to be modified using a stirrer. In this research, an analysis of the stirrer treatment using ANSYS software simulation method was carried out to determine the change of sediment before and after stirring, with stirring speed 150 rpm. The use of a stirrer simulation is to make 2 simulation models in the main tank as the largest volume and the daily tank as the smallest volume aims to determine the differences in the results of stirring in the largest and smallest tank.. At the time of stirring, the result is a decrease in sediment from 0 minutes to 4 minutes, then 4 minutes to 8 minutes, then 8 minutes to 12 minutes, then 12 minutes to 16 minutes, then 16 minutes to 20 minutes the fuel has decreased very much and the sediment is almost gone. When stirring is carried out for 20 minutes, the sediment in the fuel tank has not reached 0% so it needs to be stirred continuously until the deposit is 0%. After the fuel has not settled, the fuel is transferred to the main engine using a transfer pump. 

Numerical Simulation Method of Tensile Behavior of Glass Fiber Laminates

2014 ◽  
Vol 919-921 ◽  
pp. 1386-1389
Author(s):  
Shao Chong Yang ◽  
Jian Hui Zhang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Numerical Model ◽  
Glass Fiber ◽  
Test Data ◽  
Structural Characteristics ◽  
Simulation Method ◽  
Fe Analysis ◽  
Tensile Behavior ◽  
Ansys Software

Based on the structural characteristics of glass fiber laminates, a novel finite element numerical model of the laminates was proposed and established with ANSYS software. The results from the FE analysis are compared with available test data in the literature [1], which indicate the numerical model is reasonable and reliable. At same time, tensile behavior and shear behavior of the glass fiber laminates was analyzed. This study can provide reference for glass fiber laminates design and calculation, and has important practical value.

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