New Approach to Folding a Thin-Walled Yoshimura Patterned Cylinder

2020 ◽  
pp. 1-15
Author(s):  
Jong-Eun Suh ◽  
Tae-Hyun Kim ◽  
Jae-Hung Han
Keyword(s):  
New Approach ◽  
Thin Walled

scholarly journals A new approach for thin-walled member analysis in the framework of GBT

2011 ◽  
Vol 49 (11) ◽  
pp. 1404-1414 ◽  
Author(s):  
Gianluca Ranzi ◽  
Angelo Luongo
Keyword(s):  
New Approach ◽  
Thin Walled

Analysis of Thin-Walled Closed Beams With General Quadrilateral Cross Sections

1999 ◽  
Vol 66 (4) ◽  
pp. 904-912 ◽  
Author(s):  
J. H. Kim ◽  
Y. Y. Kim
Keyword(s):  
Finite Element ◽  
Cross Sections ◽  
Distortion Function ◽  
Element Formulation ◽  
Numerical Work ◽  
New Approach ◽  
One Dimensional ◽  
Static And Dynamic Analysis ◽  
Thin Walled ◽  
The One

This paper deals with the one-dimensional static and dynamic analysis of thin-walled closed beams with general quadrilateral cross sections. The coupled deformations of distortion as well as torsion and warping are investigated in this work. A new approach to determine the functions describing section deformations is proposed. In particular, the present distortion function satisfies all the necessary continuity conditions unlike Vlasov's distortion function. Based on these section deformation functions, a one-dimensional theory dealing with the coupled deformations is presented. The actual numerical work is carried out using two-node C0 finite element formulation. The present one-dimensional results for some static and free-vibration problems are compared with the existing and the plate finite element results.

scholarly journals Axisymmetric vibrations of a cylindrical final height piezoceramic shell

2012 ◽  
Vol 16 (6) ◽  
pp. 25-29
Author(s):  
Oleksii Volodymyrovych Korzhik ◽  
Oleh Mykolaiovych Petrishchev ◽  
N.Yu. Filippova
Keyword(s):  
Electric Fields ◽  
Radial Displacement ◽  
Final Height ◽  
Oscillatory System ◽  
Piezoceramic Shell ◽  
New Approach ◽  
Distributed Parameters ◽  
Joint Solution ◽  
Thin Walled ◽  
End To End

A new approach to describing the formation of an electric field in a material is proposed electroelastic transducer, which presented in the form of a cylindrical circular thin-walled radial polarized shell. The problem was solved by the "end-to-end" method, which involves a joint solution equations for acoustic, mechanical and electric fields taking into account physical properties of the emitting transducer. The general analytical solution "end-to-end" problem in the form of a system of resulting equations for the considered electroelastic oscillatory system in vacuum with distributed parameters written with respect to axial and radial displacement

A New Method of Quasi-Static Bifurcation Analysis and the Related Variational Theorem

1985 ◽  
Vol 9 (1) ◽  
pp. 26-31
Author(s):  
Xing Chen ◽  
Niels C. Lind
Keyword(s):  
Bifurcation Analysis ◽  
Static Problem ◽  
Approximate Solutions ◽  
Euler Method ◽  
Rate Of Change ◽  
New Method ◽  
New Approach ◽  
Variational Theorem ◽  
Creep Buckling ◽  
Thin Walled

The quasi-static problem is formulated in terms of rates. The traditional Euler method is reviewed. A new approach is developed for the quasi-static bifurcation analysis. Bifurcation is said to occur when there exists at least one additional, distinctive rate of change of a configuration in equilibrium. The related variational theorem is derived in the same manner that the Sanders variational theorem for creep was developed. An example is given for the creep buckling of a thin-walled cylindrical shell loaded in axial compression. It is concluded that the new method yields good approximate solutions but is apparently simpler than the Euler method.

An Approach to Determine Clamping Forces and Clamping Sequence of Thin-Walled Workpiece during Milling Process

2012 ◽  
Vol 591-593 ◽  
pp. 580-583
Author(s):  
Xiao Yan Zuo ◽  
Bei Zhi Li ◽  
Xiao Hui Jiang ◽  
Jian Guo Yang
Keyword(s):  
Mathematical Model ◽  
Screw Theory ◽  
Milling Process ◽  
Contact Friction ◽  
Clamping Force ◽  
Minimum Modulus ◽  
New Approach ◽  
Thin Walled ◽  
Clamping Sequence

The clamping force and clamping sequence in the process of thin-walled parts is an important factor affecting the quality of the workpiece. This article focused on solving the parts clamping force of the locating point and clamping sequence, according to the process of clamping force on the workpiece, by the means of screw theory and the minimum modulus principle, taking the contact friction into account, the article established a mathematical model. Furthermore, a new approach to optimize clamping and clamping sequence has been put forward combining Matlab optimization toolbox, which provided guidance basic theory for the preload design of the clamping process and flexible clamping. Finally a detailed discussion was conducted to the calculation of clamping force and clamping sequence by using some practical examples.

Analysis of deformation of non-stiffbillets depending on the clamping scheme and cutting modes

2016 ◽  
Vol 1 (2) ◽  
pp. 25-33
Author(s):  
Назим Султан-заде ◽  
Nazim Sultan-zade ◽  
В Окунев ◽  
V Okunev
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Machine Tools ◽  
Calculation Error ◽  
New Approach ◽  
Cylindrical Billet ◽  
Thin Walled ◽  
Machining Operations ◽  
Cutting Modes ◽  
Element Method

Clamping of non-stiff thin-walled billets on machine tools for various machining operations is accompanied by the appearance of significant deformations in them. The new approach to the analysis of the billetdeformations from the clamping forcesis developed on the base of finite element method. The calculation error of billet fixing is estimatedon the example of a cylindrical billet. For various fixing schemes the corresponding boundary conditions are developed. The error analysis results obtained by finite element method for various fixing schemes, billet geometry and cutting modes are presented.

scholarly journals Milling of Thin Walled Components from Aluminum Alloys by Considering the Conditions of Rigidity and Automation Assignment Elements of a Cutting Mode on CNC Machines

2019 ◽  
Vol 297 ◽  
pp. 01010
Author(s):  
Michail Nazarov ◽  
Evgeny Kiselev
Keyword(s):  
Cutting Tool ◽  
Dimensional Accuracy ◽  
Numerical Control ◽  
Aviation Industry ◽  
Geometrical Parameters ◽  
Thin Wall ◽  
Engineering Analysis ◽  
New Approach ◽  
Thin Walled ◽  
Analysis System

The work is devoted to the problems of manufacturing thinwalled parts of the aviation industry and instrument engineering on modern numerical control machines. The main reason of defects of such products -loss of dimensional accuracy is revealed. The reason for this is the elastic deformation of the workpiece during milling. A mathematical model for calculating the elastic pressing of a thin wall during milling is proposed. The method of checking the adequacy of the developed model with the help of engineering analysis system is presented. The minimum set of geometrical parameters of the processed element and the cutting tool necessary for search of the rational cutting mode was defined. A new approach to automation of this process present through the evaluation of all possible solutions. The calculation of the rational cutting mode was made taking into account the conditions of rigidity of the workpiece. Conclusions on the efficiency of the developed technique are made.

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