Beranek's porous material model: Inspiration for advanced material analysis and design

2014 ◽  
Vol 136 (4) ◽  
pp. 2162-2162
Author(s):  
Cameron J. Fackler ◽  
Ning Xiang
Keyword(s):  
Porous Material ◽  
Material Model ◽  
Advanced Material ◽  
Analysis And Design ◽  
Material Analysis

The Influence of Steam Cold Trap in the Vacuum Chamber Installation on the Ice Sublimation Speed

2016 ◽  
Vol 20 (2) ◽  
pp. 53-61
Author(s):  
Jarosław Diakun ◽  
Kamil Dolik ◽  
Adam Kopeć
Keyword(s):  
Porous Material ◽  
Vacuum Chamber ◽  
Material Model ◽  
Vacuum Pump ◽  
Steam Flow ◽  
Cold Trap ◽  
Comparative Tests ◽  
Sublimation Process ◽  
Research Material ◽  
Ice Sublimation

AbstractThis work is a continuation of research on the differences in the sublimation speed of free ice and ice contained in the porous material. The results of previous research were published in Technica Agraria 12(1-2)/2013 (Diakun, Dolik, Kopec “The sublimation speed of free ice and ice in the sprat carcass”). A test stand used in studies was supplemented by a cold trap to prevent the steam flow into the vacuum pump and for the intensification of the ice sublimation process. The comparative tests: with the cold trap and without were performed. The research material (samples) was in the form of ice nugget, frozen sprat carcasses and ice frozen within the sponge (porous material model). The aim of the study was to examine the cold trap impact on the conditions within the vacuum chamber during sublimation and the speed of the process. The differences in the sublimation speed for the free ice, the ice from the frozen sprat and from the model were rated. The results showed a significant increase in the sublimation speed during the process with the active cold trap.

scholarly journals Numerical Study on Nonlinear Semiactive Control of Steel-Concrete Hybrid Structures Using MR Dampers

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Long-He Xu ◽  
Zhong-Xian Li ◽  
Yang Lv
Keyword(s):  
Active Control ◽  
Numerical Study ◽  
Material Model ◽  
Relative Displacement ◽  
Hybrid Structure ◽  
Semiactive Control ◽  
Building Structures ◽  
Seismic Safety ◽  
Analysis And Design ◽  
Mr Dampers

Controlling the damage process, avoiding the global collapse, and increasing the seismic safety of the super high-rise building structures are of great significance to the casualties’ reduction and seismic losses mitigation. In this paper, a semiactive control platform based on magnetorheological (MR) dampers comprising the Bouc-Wen model, the semi-active control law, and the shear wall damage criteria and steel damage material model is developed in LS-DYNA program, based on the data transferring between the main program and the control platform; it can realize the purpose of integrated modeling, analysis, and design of the nonlinear semi-active control system. The nonlinear seismic control effectiveness is verified by the numerical example of a 15-story steel-concrete hybrid structure; the results indicate that the control platform and the numerical method are stable and fast, the relative displacement, shear force, and damage of the steel-concrete structure are largely reduced using the optimal designed MR dampers, and the deformations and shear forces of the concrete tube and frame are better consorted by the control devices.

Analysis and design of steel plate walls: experimental evaluation

2011 ◽  
Vol 38 (1) ◽  
pp. 60-70 ◽  
Author(s):  
Mehdi H.K. Kharrazi ◽  
Carlos E. Ventura ◽  
Helmut G.L. Prion
Keyword(s):  
Experimental Evaluation ◽  
Steel Plate ◽  
Plastic Material ◽  
Material Model ◽  
Steel Plates ◽  
Ultimate Capacity ◽  
Initial Stiffness ◽  
Analysis And Design ◽  
Perfectly Plastic ◽  
Elastic Perfectly Plastic

In this paper, the effectiveness of the Modified Plate–Frame Interaction (M-PFI) model is evaluated by comparing its outcomes against those from experimental results obtained from a number of steel plate walls (SPWs) tested at different universities. As a result of the comparison, the M-PFI model was found to provide satisfactory predictions for SPW specimens constructed with steel plates welded to column and beam members. The M-PFI model was able to predict the initial stiffness, as well as to evaluate whether the boundary members of the SPW have sufficient capacity to allow for the infill plate to yield entirely. However, the model was found to underestimate the ultimate capacity of the SPW system mainly because, among other reasons, the material model used for its underlying theory is the elastic – perfectly plastic material model.

Parameterization of the porous-material model for sand with different levels of water saturation

2008 ◽  
Vol 28 (1) ◽  
pp. 20-35 ◽  
Author(s):  
M. Grujicic ◽  
B. Pandurangan ◽  
R. Qiao ◽  
B.A. Cheeseman ◽  
W.N. Roy ◽  
...  
Keyword(s):  
Porous Material ◽  
Water Saturation ◽  
Material Model ◽  
Different Levels

scholarly journals Plasticity Modelling in PM Steels

2017 ◽  
Vol 17 (1) ◽  
pp. 29-36
Author(s):  
M. Andersson ◽  
V. Angelopoulos
Keyword(s):  
Porous Materials ◽  
Indentation Test ◽  
Material Model ◽  
Experimental Results ◽  
Material Models ◽  
Advanced Material ◽  
Material Data

Abstract Simulations are continuously becoming more and more important to predict the behaviour of materials, components and structures. Porous materials, such as PM, put special demands on the material models used. This paper investigates the application of the Gurson material model to PM steels. It is shown how the model can be calibrated to material data. The results are also applied to an indentation test, where it’s demonstrated that experimental results can be reproduced with some accuracy. Limitations of the model, and the potential to use more advanced material models are also discussed.

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