scholarly journals A Multiscale Simulation Method and Its Application to Determine the Mechanical Behavior of Heterogeneous Geomaterials

2017 ◽  
Vol 2017 ◽  
pp. 1-12 ◽  
Author(s):  
Shengwei Li ◽  
Heping Xie ◽  
Ru Zhang ◽  
Mingzhong Gao ◽  
Zetian Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Finite Element ◽  
Mechanical Behavior ◽  
Molecular Simulation ◽  
Heterogeneous Material ◽  
Simulation Method ◽  
Multiscale Simulation ◽  
Mechanical Behaviors ◽  
Finite Element Numerical Simulation

To study the micro/mesomechanical behaviors of heterogeneous geomaterials, a multiscale simulation method that combines molecular simulation at the microscale, a mesoscale analysis of polished slices, and finite element numerical simulation is proposed. By processing the mesostructure images obtained from analyzing the polished slices of heterogeneous geomaterials and mapping them onto finite element meshes, a numerical model that more accurately reflects the mesostructures of heterogeneous geomaterials was established by combining the results with the microscale mechanical properties of geomaterials obtained from the molecular simulation. This model was then used to analyze the mechanical behaviors of heterogeneous materials. Because kernstone is a typical heterogeneous material that comprises many types of mineral crystals, it was used for the micro/mesoscale mechanical behavior analysis in this paper using the proposed method. The results suggest that the proposed method can be used to accurately and effectively study the mechanical behaviors of heterogeneous geomaterials at the micro/mesoscales.

Hot Compression Simulation of Ti75 Alloy Based on DEFORM-3D

2012 ◽  
Vol 229-231 ◽  
pp. 55-58
Author(s):  
Jun Fan
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Simulation Method ◽  
Hot Compression ◽  
Strain Rates ◽  
Know How ◽  
Numerical Simulation Method ◽  
Control Objective ◽  
Finite Element Numerical Simulation ◽  
Deform 3D

To obtain the know-how of the deficiency for the filling capability, taking Ti75 alloy as the research object, at the same height of reducing, strain rates during forming as the control objective, the finite element numerical simulation method was used to simulate the hot compression with DEFORM-3D, analyzing the effect of the strain rates on the distribution of strain and stress.

Modeling and Assessment of Porosity Effects on Mechanical Properties of Tissue Scaffolds

2006 ◽  
Author(s):  
W. M. Parks ◽  
Y. B. Guo ◽  
K. A. Woodbury
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Mechanical Behavior ◽  
Tissue Scaffolds ◽  
Materials Testing ◽  
Mechanical Behaviors ◽  
Fea Model ◽  
Pore Architecture ◽  
Static Mechanical ◽  
Scaffold Architecture

Mechanical properties of scaffolds are important for fabricating engineered tissues. However, localized mechanical properties of scaffold cannot be directly obtained from experiments. This study provides a solid modeling approach to simulate mechanical behaviors of alginate scaffolds with different porosity. A scaffold micro-domain has been modeled as made of sub-units, arranged in a sphere-based pore architecture. An expression to calculate porosity was also derived for the scaffold architecture. Finite element simulations of compressing alginate scaffolds were performed to evaluate the effect of porosity on quasi-static mechanical behavior. The developed FEA model is capable of computing scaffold strength and predicting localized mechanical behavior without destructive materials testing.

Analysis of the Mechanical Property of Collapse in Shallow-Buried Loess Tunnel under Unsymmetrical Pressure

2013 ◽  
Vol 645 ◽  
pp. 426-429 ◽  
Author(s):  
Xiao Hui Xue ◽  
Zhong Ming Su
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Mechanical Property ◽  
Finite Element ◽  
Collapse Mechanism ◽  
Tunnel Excavation ◽  
Finite Element Numerical Simulation ◽  
Tunnel Collapse ◽  
Primary Support

Based on selecting a tunnel collapse under typical conditions of the shallow-buried terrain under unsymmetrical pressure, analyzing the monitoring measurement date, using the software of finite element numerical simulation, the paper simulates the tunnel excavation in lengthwise, deduces the change laws of stress in primary support, the mechanical properties and the collapse mechanism.

Finite Element Simulation and Experimental Analysis of O-P Hardness

2014 ◽  
Vol 1033-1034 ◽  
pp. 462-465
Author(s):  
Yong Huang ◽  
De Jun Ma ◽  
W. Chen ◽  
Jia Liang Wang ◽  
Liang Sun
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Simulation Method ◽  
Indentation Hardness ◽  
Element Analysis ◽  
Simulation Techniques ◽  
Element Simulation ◽  
The Finite Element Analysis ◽  
Finite Element Numerical Simulation

Based on the finite element analysis method to simulate the O-P hardness. Taking S45C steel as an example, comparative analysis of O-P hardness of finite element simulation and O-P hardness of instrument indentation hardness experiment, results show that difference of S45C steel’s O-P hardness between the finite element simulation and real experiment is-2.62% Accordingly seen, O-P hardness can be obtained by finite element numerical simulation method, it’s a possible way to study relations between O-P hardness and Vickers hardness based on finite element numerical simulation techniques.

scholarly journals Multiscale Simulation of Semi-Crystalline Polymers to Predict Mechanical Properties

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3233
Author(s):  
Tobias Daniel Horn ◽  
Dario Heidrich ◽  
Hans Wulf ◽  
Michael Gehde ◽  
Jörn Ihlemann
Keyword(s):  
Mechanical Properties ◽  
Cellular Automaton ◽  
Mechanical Behavior ◽  
Evolution Equations ◽  
Fe Simulation ◽  
Simulation Method ◽  
Multiscale Simulation ◽  
Crystalline Polymers ◽  
Degree Of Crystallization

A multiscale simulation method for the determination of mechanical properties of semi-crystalline polymers is presented. First, a four-phase model of crystallization of semi-crystalline polymers is introduced, which is based on the crystallization model of Strobl. From this, a simulation on the nanoscale is derived, which models the formation of lamellae and spherulites during the cooling of the polymer by using a cellular automaton. In the solidified state, mechanical properties are assigned to the formed phases and thus the mechanical behavior of the nanoscale is determined by a finite element (FE) simulation. At this scale, simulations can only be performed up to a simulation range of a few square micrometers. Therefore, the dependence of the mechanical properties on the degree of crystallization is determined by means of homogenization. At the microscale, the cooling of the polymer is simulated by a cellular automaton according to evolution equations. In combination with the mechanical properties determined by homogenization, the mechanical behavior of a macroscopic component can be predicted.

Finite Element Numerical Simulation of Two-Dimensional Unsaturated Soil Water Movement Problems

2011 ◽  
Vol 71-78 ◽  
pp. 2933-2938
Author(s):  
Meng Ling Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Soil Water ◽  
Unsaturated Soils ◽  
Water Movement ◽  
Simulation Method ◽  
Water Dynamics ◽  
Seepage Irrigation ◽  
Finite Element Numerical Simulation ◽  
The Mathematical Model

According to the fundamental theory of soil water dynamics, the mathematical model of 2-D unsaturated soils water movement with variable is established under the condition of furrow irrigation or underground channel seepage irrigation,and is calculated by the finite element numerical simulation method .The numerical simulation shows that the calculated results of numerical simulation is in good agreement with the measured date of experiment.

The TLCD U-Tube Liquid Sloshing Finite Element Modal Analysis

2013 ◽  
Vol 694-697 ◽  
pp. 350-353
Author(s):  
Jie Sun ◽  
Gong Yu Li ◽  
Lang Liu ◽  
Qing Bo Liu
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Modal Analysis ◽  
Dynamic Characteristics ◽  
Simulation Method ◽  
Liquid Sloshing ◽  
Rectangular Container ◽  
Numerical Simulation Method ◽  
Sloshing Frequency ◽  
Finite Element Numerical Simulation

The paper studies the dynamic characteristics of liquid sloshing in TLD rectangular container, and verifies the feasibility of finite element numerical simulation, by the theory and finite element numerical simulation of liquid sloshing. Similarly employing the verified numerical simulation method, we get the sloshing frequency and mode of liquid sloshing in TLCD u-tube container.

Numerical Simulation Analysis on Shear Bearing Capacity Experiments of Cold-Formed Steel Self-Drilling Screws Connection

2012 ◽  
Vol 166-169 ◽  
pp. 200-206
Author(s):  
Lin Feng Lu ◽  
Guang Yin Huang ◽  
Wen Qi Fang ◽  
Dong Hua Yang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Contact Problem ◽  
Bearing Capacity ◽  
Large Deformation ◽  
Simulation Analysis ◽  
Simulation Method ◽  
Shear Bearing Capacity ◽  
Cold Formed Steel ◽  
Finite Element Numerical Simulation

Cold-formed steel self-drilling screws connection are imitated to carry out numerical simulation analysis, in which geometric large deformation, materials nonlinear and contact problem are taken into account. From the comparison of computer analysis with experimental results, it comes out that the finite element numerical simulation method is accurate and feasible.

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