Closed-form effective elastic constants of frame-like periodic cellular solids by a symbolic object-oriented finite element program

2016 ◽  
Vol 13 (3) ◽  
pp. 363-383 ◽  
Author(s):  
Pisith Sam ◽  
Pruettha Nanakorn ◽  
Kasem Theerakittayakorn ◽  
Pana Suttakul
Keyword(s):  
Finite Element ◽  
Closed Form ◽  
Elastic Constants ◽  
Object Oriented ◽  
Cellular Solids ◽  
Finite Element Program ◽  
Effective Elastic Constants ◽  
Element Program

An object-oriented finite-element program for electromagnetic field computation

1994 ◽  
Vol 30 (5) ◽  
pp. 3618-3621 ◽  
Author(s):  
E.J. Silva ◽  
R.C. Mesquita ◽  
R.R. Saldanha ◽  
P.F.M. Palmeira
Keyword(s):  
Finite Element ◽  
Electromagnetic Field ◽  
Object Oriented ◽  
Finite Element Program ◽  
Field Computation ◽  
Element Program

Improvement of Continuity Between Industrial Software and Research One by Object-Oriented Finite Element Formulation of Shell and Plate Element

2019 ◽  
pp. 24-56
Author(s):  
Sabah Moussaoui ◽  
Mourad Belgasmia
Keyword(s):  
Finite Element ◽  
Object Oriented ◽  
Shell Element ◽  
Object Oriented Programming ◽  
Plate Element ◽  
Finite Element Program ◽  
Isotropic Shell ◽  
Plate And Shell ◽  
Element Program ◽  
Industrial Software

This chapter shows, through the example of the addition of a plate and shell element to freeware FEM-object, an object-oriented (C++) finite element program, how object-oriented approaches, as opposed to procedural approaches, make finite element codes more compact, more modular, and versatile but mainly more easily expandable, in order to improve the continuity and the compatibility between software of research and industrial software. The fundamental traits of object-oriented programming are first briefly reviewed, and it is shown how such an approach simplifies the coding process. Then, the isotropic shell and orthotropic plate formulations used are given and the discretized equations developed. Finally, the necessary additions to the FEM-object code are reviewed. Numerical examples using the newly created plate membrane plate element are shown.

Finite Element Program Design of Bridge Structures with Internal and External Prestressing

2011 ◽  
Vol 250-253 ◽  
pp. 1493-1497
Author(s):  
Jian Yuan Sun ◽  
Yi Chao Yuan ◽  
Kun Peng Li
Keyword(s):  
Finite Element ◽  
Structural Analysis ◽  
Object Oriented ◽  
Analysis Program ◽  
The Finite Element Method ◽  
Finite Element Program ◽  
Design And Implementation ◽  
External Prestressing ◽  
Bridge Structures ◽  
Element Program

Recently internal and external prestressing enjoys a booming in the bridge construction, but the existing structural analysis programs of bridge can’t meet the requirements of analyzing the internal and external prestressing comprehensively. This paper will simulate internal and external prestressing effects by the finite element method; come up with some programming methods based on the object-oriented thought; and put forward the design and implementation methods of internal and external prestressing effect class by abstracting them to the corresponding class and elaborating the main features of each class, including the instantiation object and the typical method, to realizing the internal and external prestressing effects calculating. All of these will provide some references to the development of structural analysis program of bridge.

scholarly journals The impact of drilling and slitting construction on damage field: evolution characteristics in low-permeability coal seam

2021 ◽  
Vol 37 ◽  
pp. 205-215
Author(s):  
Heng Chen ◽  
Hongmei Cheng ◽  
Aibin Xu ◽  
Yi Xue ◽  
Weihong Peng
Keyword(s):  
Finite Element ◽  
Rock Mass ◽  
Damage Mechanics ◽  
Effective Strain ◽  
Secondary Development ◽  
Distribution Area ◽  
Finite Element Program ◽  
Element Program ◽  
Mining Face ◽  
The Impact

ABSTRACT The fracture field of coal and rock mass is the main channel for gas migration and accumulation. Exploring the evolution law of fracture field of coal and rock mass under the condition of drilling and slitting construction has important theoretical significance for guiding efficient gas drainage. The generation and evolution process of coal and rock fissures is also the development and accumulation process of its damage. Therefore, based on damage mechanics and finite element theory, the mathematical model is established. The damage variable of coal mass is defined by effective strain, the elastoplastic damage constitutive equation is established and the secondary development of finite element program is completed by FORTRAN language. Using this program, the numerical simulation of drilling and slitting construction of the 15-14120 mining face of Pingdingshan No. 8 Mine is carried out, and the effects of different single borehole diameters, different kerf widths and different kerf heights on the distribution area of surrounding coal fracture field and the degree of damage are studied quantitatively. These provide a theoretical basis for the reasonable determination of the slitting and drilling arrangement parameters at the engineering site.

Mechanical Property Analysis and Numerical Simulation of Honeycomb Sandwich Structure’s Core

2013 ◽  
Vol 631-632 ◽  
pp. 518-523 ◽  
Author(s):  
Xiang Li ◽  
Min You
Keyword(s):  
Numerical Simulation ◽  
Elastic Constants ◽  
Sandwich Structure ◽  
Optimization Design ◽  
Simulation Analysis ◽  
Finite Element Program ◽  
Honeycomb Sandwich ◽  
Calculation Results ◽  
Element Program ◽  
Typical Satellite

Owing to the lack of a good theory method to obtain the accurate equivalent elastic constants of hexagon honeycomb sandwich structure’s core, the paper analyzed mechanics performance of honeycomb sandwich structure’s core and deduced equivalent elastic constants of hexagon honeycomb sandwich structure’s core considering the wall plate expansion deformation’s effect of hexagonal cell. And also a typical satellite sandwich structure was chose as an application to analyze. The commercial finite element program ANSYS was employed to evaluate the mechanics property of hexagon honeycomb core. Numerical simulation analysis and theoretical calculation results show the formulas of equivalent elastic constants is correct and also research results of the paper provide theory basis for satellite cellular sandwich structure optimization design.

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