Begell House Inc.
Composites: Mechanics, Computations, Applications: An International Journal
CMCA
2152-2057
2
4
2011
PREDICTION OF THE REGIMES OF 3D-FORMING OF SHEET CLOTH-REINFORCED THERMOPLASTICS BY THE CHARACTERISTICS OF THE VISCOELASTIC PROPERTIES OF PREPREGS
271-295
10.1615/CompMechComputApplIntJ.v2.i4.10
A. V.
Markov
Belarusian State Technological University, Minsk, Belarus
prepreg
viscosity
pressing
It is shown that in the process of the 3D-forming of sheet, fabric-reinforced thermoplastics, the rheological properties of a material at the processing "temperature are responsible for the stressed-deformed state of the product and, consequently, for the quality of the products obtained. The prediction of the behavior of a material in a viscous-flowing state makes it possible to optimize the structure of the reinforced thermoplastics and the parameters of the process of pressing to attain the needed deformation characteristics. The methods of determining the parameters of a power flow of the prepreg at the typical kinds of deformation are suggested.
SERIES SOLUTIONS FOR THE STAGNATION FLOW OF A MAXWELL FLUID OVER A SHRINKING SHEET
297-311
10.1615/CompMechComputApplIntJ.v2.i4.20
Sohail
Nadeem
Department of Mathematics, Quaid-i-Azam University 45320, Islamabad 44000, Pakistan
Noreen Sher
Akbar
DBS&H, CEME, National University of Sciences and Technology, Islamabad, Pakistan
Ahmet
Yildirim
Department of Mathematics, Ege University, 35100 Bornova-Izmir, Turkey; Department of Mathematics and Statistics, University of South Florida, Tampa, FL 33620-5700, USA
Anwar
Hussain
Department of Mathematics, Quaid-i-Azam University 45320, Islamabad 44000, Pakistan
Mohamed
Ali
King Saud University, College of Engineering, Mechanical Engineering Department, P. O. Box 800, Riyadh 11421, Saudi Arabia
stagnation flow
Maxwell fluid
shrinking sheet
series solutions
The present paper describes the analytical solutions for the steady boundary-layer flow of a Maxwell fluid over a shrinking sheet. The governing equations of motion are reduced into the set of nonlinear ordinary differential equations by using similarity transformations. Two types of problems, namely, (i) two-dimensional stagnation flow towards a shrinking sheet and (ii) axisymmetric stagnation flow towards an axisymmetric shrinking sheet have been discussed. The series solutions of the problems are obtained by using the homotopy analysis method (HAM). Convergence of the obtained series solutions is analyzed and discussed in detail through graphs for various parameters of interest.
PRINCIPLES OF GENERATION OF MECHANICAL PROPERTIES OF HIGH-ENERGY FILLED POLYMER COMPOSITIONS
313-326
10.1615/CompMechComputApplIntJ.v2.i4.30
A.S.
Zharkov
Federal State Unitary Enterprise Federal Scientific and Production Center "Altai", Biisk, Russian Federation
I. I.
Anisimov
Federal State Unitary Enterprise Federal Scientific and Production Center "Altai", Biisk, Russian Federation
A. V.
Litvinov
Federal State Unitary Enterprise Federal Scientific and Production Center "Altai", Biisk, Russian Federation
E. A.
Chashchikhin
Federal State Unitary Enterprise Federal Scientific and Production Center "Altai", Biisk, Russian Federation
V. I
Desyatykh
Federal State Unitary Enterprise Federal Scientific and Production Center "Altai", Biisk, Russian Federation
S. P.
Ogorodnikov
Federal State Unitary Enterprise Federal Scientific and Production Center "Altai", Biisk, Russian Federation
B. A.
Lyukshin
Institute of the Physics of Strength and of Material Science, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
S. A.
Bochkareva
Institute of the Physics of Strength and of Material Science, Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia
filled polymer systems
mechanical properties
structure elements
mathematical simulation
laboratory experiment
The long period (up to 7-10 years) and high financial cost of modern experimental methods used for generation of energy and operational properties of materials for rocket and space technologies stimulate a more active use of physical modeling methods and technologies for their computer implementation. The paper analyzes the prospects and ways of application of these methods for solving problems of generation of mechanical characteristics of the above high-energy materials. Principles of heterogeneous structural mechanics are used as a theoretical basis. A physical statement is formulated, and the research subject is characterized.
INVESTIGATION OF THE LOCATION OF A SHEAR WALL IN AN RCC MEDIUM-RISE BUILDING
327-335
10.1615/CompMechComputApplIntJ.v2.i4.40
S.
Agrawal
Civil Engineering Group, BITS Pilani, Raj as than, India
S.
Anshuman
Civil Engineering Group, BITS Pilani, Raj as than, India
Dipendu
Bhunia
Department of Civil Engineering, Birla Institute of Technology & Science, Pilani-333031, Rajasthan, India
R. K.
Pandey
Civil Engineering Group, Samhigginbottom Institute of Agriculture Technology and Science, Allahabad, India
linear behavior of a shear wall
seismic analysis
STAAD PRO (2004)
SAP2000 (2006)
Shear wall systems are among the most commonly used lateral-load resisting systems in high-rise buildings. Shear walls have very high in-plane stiffness and strength, which can be used to simultaneously resist large horizontal loads and support gravity loads, making them quite advantageous in many structural engineering applications. Many references are available concerning the design and analysis of a shear wall. However, the decision about the location of a shear wall in a multistorey building is not much discussed in any of them.
In this paper, therefore, the main focus is to determine the shear wall location in a multistorey building based on its elastic and elastoplastic behaviors. An earthquake load is calculated and applied to a building of fifteen stories located in zone IV. Elastic and elastoplastic analyses were performed using both STAAD PRO 2004 and SAP2000 (2006) software packages. Shear forces, bending moment, and storey drift were computed in both cases and the location of a shear wall was established based upon the above computations.
MODELING OF MECHANICAL BEHAVIOR OF CROSS-REINFORCED METAL COMPOSITES UNDER THE CONDITIONS OF STEADY-STATE CREEP
337-361
10.1615/CompMechComputApplIntJ.v2.i4.50
A. P.
Yankovskii
Institute of Theoretical and Applied Mechanics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
metal composites
three-dimensional reinforcement
cross reinforcement
steady-state creep
structural theory; thin-walled elements
Iterative models describing the mechanical behavior of metal composite media, cross-reinforced in the plane and space, whose component materials work under the conditions of steady-state creep, are proposed. The cases of incompressible materials in creeping and compressible materials are analyzed. A comparative analysis of calculations by different structural models of the mechanical behavior of cross-reinforced metal composites under the conditions of steady-state creep is made.