scholarly journals Hysteretic behavior modeling of elastoplastic materials

2008 ◽  
Vol 35 (1-3) ◽  
pp. 287-304
Author(s):  
Dragoslav Sumarac ◽  
Bojan Medjo ◽  
Natasa Trisovic
Keyword(s):  
Plastic Material ◽  
Rectangular Cross Section ◽  
Axial Loading ◽  
Hysteretic Behavior ◽  
Behavior Modeling ◽  
Cyclic Behavior ◽  
Preisach Model ◽  
Viscous Effects ◽  
Rectangular Tube ◽  
History Of

In the present paper the Preisach model of hysteresis is applied to model cyclic behavior of elasto-plastic material. Rate of loading and viscous effects will not be considered. The problem of axial loading of rectangular cross section and cyclic bending of rectangular tube (box) will be studied in details. Hysteretic stress-strain loop for prescribed history of stress change is plotted for material modeled by series connection of three unite element. Also moment-curvature hysteretic loop is obtained for a prescribed curvature change of rectangular tube (box). One chapter of the paper is devoted to results obtained by FEM using Finite Element Code ABAQUS. All obtained results clearly show advantages of the Preisach model for describing cyclic behavior of elasto-plastic material.

Hysteretic behavior of rectangular tube (box) sections based on Preisach model

2012 ◽  
Vol 82 (10-11) ◽  
pp. 1663-1673 ◽  
Author(s):  
Dragoslav Šumarac ◽  
Zoran Petrašković
Keyword(s):  
Hysteretic Behavior ◽  
Preisach Model ◽  
Rectangular Tube

Hysteretic Behavior of a Bar Under Repeated Axial Loading: An Extended History

2000 ◽  
Vol 68 (3) ◽  
pp. 425-431
Author(s):  
N. Yoshida ◽  
T. Nonaka
Keyword(s):  
Analytical Study ◽  
Axial Loading ◽  
Hysteretic Behavior ◽  
Perfectly Plastic ◽  
Small Deflection ◽  
Previous Formulation ◽  
History Of ◽  
State Variation ◽  
Basic Equations ◽  
Elastic Perfectly Plastic

Analytical study is made of an elastic-perfectly plastic bar under repeated axial loading. A previous formulation on a pin-ended bar is extended here to include the effects of load eccentricity and rotational constraint at the bar ends. Basic equations are derived, based on the assumptions of planar and small deflection, and of symmetry with respect to the bar center. The end spring is allowed to yield. Numerical examples are presented to demonstrate the application of the basic equations, and adequacy is shown for any specified history of axial displacement. Diagrammatical representation of state variation provides a better understanding of the hysteretic behavior as well as the applicability of the basic equations.

scholarly journals Numerical simulation of blanking process

2018 ◽  
Vol 157 ◽  
pp. 02038
Author(s):  
Peter Pecháč ◽  
Milan Sága
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Steel Sheet ◽  
Plastic Material ◽  
Material Model ◽  
Rolled Steel ◽  
Finite Element Software ◽  
History Of ◽  
Cold Rolled ◽  
Blanking Process

This paper presents numerical simulation of blanking process for cold-rolled steel sheet metal. The problem was modeled using axial symmetry in commercial finite element software ADINA. Data obtained by experimental measurement were used to create multi-linear plastic material model for simulation. History of blanking force vs. tool displacement was obtained.

Elastic and elastic-plastic finite element analysis of hollow tubes with axisymmetric internal projections under combined axial and pressure loading

2001 ◽  
Vol 36 (4) ◽  
pp. 373-390 ◽  
Author(s):  
S. J Hardy ◽  
M. K Pipelzadeh ◽  
A. R Gowhari-Anaraki
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Internal Pressure ◽  
Plastic Material ◽  
Axial Loading ◽  
Material Model ◽  
Pressure Loading ◽  
Element Analysis ◽  
Elastic Plastic ◽  
Applied Loading

This paper discusses the behaviour of hollow tubes with axisymmetric internal projections subjected to combined axial and internal pressure loading. Predictions from an extensive elastic and elastic-plastic finite element analysis are presented for a typical geometry and a range of loading combinations, using a simplified bilinear elastic-perfectly plastic material model. The axial loading case, previously analysed, is extended to cover the additional effect of internal pressure. All the predicted stress and strain data are found to depend on the applied loading conditions. The results are normalized with respect to material properties and can therefore be applied to geometrically similar components made from other materials, which can be represented by the same material models.

scholarly journals CYCLIC BEHAVIOR OF A RESTRAINED STEEL BRACE UNDER AXIAL LOADING

1977 ◽  
Vol 262 (0) ◽  
pp. 83-92
Author(s):  
MINORU WAKABAYASHI ◽  
CHIAKI MATSUI ◽  
ISAO MITANI
Keyword(s):  
Axial Loading ◽  
Cyclic Behavior

Experimental and numerical study on largely perforated steel shear plates with rectangular tube–shaped links

2020 ◽  
Vol 23 (15) ◽  
pp. 3307-3322 ◽  
Author(s):  
H Monsef Ahmadi ◽  
MR Sheidaii ◽  
H Boudaghi ◽  
G De Matteis
Keyword(s):  
Finite Element ◽  
Numerical Study ◽  
Equivalent Plastic Strain ◽  
Absorption Capacity ◽  
Hysteretic Behavior ◽  
Steel Plate Shear Wall ◽  
Grid Systems ◽  
Finite Element Software ◽  
Internal Link ◽  
Rectangular Tube

Steel plate shear wall is one of the most effective dissipation systems which are commonly used in buildings. In order to improve the hysteretic behavior of shear panels, large perforation patterns may be applied, transforming the shear plate into a sort of grid systems, where plastic deformations are concentrated on specific internal link elements. This study investigates the behavior of grid systems loaded in shear where the internal links are created by cutting out internal parts, leaving rectangular tube–shaped link elements. The influence of internal link geometry on the cyclic performance of the systems is investigated experimentally. To this purpose, two specimens that varied in the width of links were fabricated and tested. The results indicate that any increase in the width of links leads to the growth of the ultimate strength, stiffness, and energy absorption capacity. Likewise, the stress distribution and fracture tendency of the tested specimens have been simulated by the finite element software (ABAQUS) and validated according to the experimental results. Based on finite element results, a suitable analytical formulation for the prediction of the shear strength at several shear deformation demands, considering the effect of thickness of the link, has been provided. Moreover, to improve the fracture tendency of the specimens, butterfly-shaped links, which varied in the middle length, were applied. The obtained results, which have been interpreted by considering the equivalent plastic strain value, prove that the shear panel behavior improves significantly when butterfly-shaped links are considered.

scholarly journals Plastic habits – an overview for the collection ‘Plastics and Sustainable Earth’

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Harriet Paterson
Keyword(s):  
Product Development ◽  
Behavior Change ◽  
Fossil Fuels ◽  
Plastic Material ◽  
Synthetic Material ◽  
Current Dependence ◽  
Scientific Exploration ◽  
History Of ◽  
Use Behavior ◽  
Plastic Products

AbstractOver the last 60 years we have modified our behavior to make use of new synthetic material produced from fossil fuels. We have incorporated it into almost every facet of our lives making us more comfortable. The production of plastic material has grown at an alarming rate and huge volumes of non-biodegradable waste now litters the surface of the planet creating a major global problem. To reverse this problem, we need to consider both obvious and novel behavior change and product development. While we are beginning to remove plastic items from the environment, we do have the responsibility to reduce the amount of new plastic material entering the waste stream. In order to achieve this, it is necessary to explore all options relating to the way we design, produce and consume products and determine what acceptable waste is. This article collection is concerned with addressing the problem by exploring a variety of topics as diverse as the history of plastic material use, behavior change, and the development of new, environmentally friendly products and their impact on the environment. The following essay outlines a few ideas that do require further scientific exploration so we can begin the process of weaning society off its current dependence on plastic products.

scholarly journals Numerical Analysis of Axial Cyclic Behavior of FRP Retrofitted CHS Joints

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 648
Author(s):  
Mohammad Alembagheri ◽  
Maria Rashidi ◽  
Amin Yazdi ◽  
Bijan Samali
Keyword(s):  
Numerical Analysis ◽  
Welding Process ◽  
Axial Loading ◽  
Cyclic Behavior ◽  
Buckling Mode ◽  
Compression Load ◽  
Hollow Section ◽  
Plastic Failure ◽  
Frp Composite ◽  
Circular Hollow Section

This paper aims to numerically investigate the cyclic behavior of retrofitted and non-retrofitted circular hollow section (CHS) T-joints under axial loading. Different joints with varying ratios of brace to chord radius are studied. The effects of welding process on buckling instability of the joints in compression and the plastic failure in tension are considered. The finite element method is employed for numerical analysis, and the SAC protocol is considered as cyclic loading scheme. The CHS joints are retrofitted with different numbers of Fiber Reinforced Polymer (FRP) layers with varying orientation. The results show that the welding process significantly increases the plastic failure potential. The chord ovalization is the dominant common buckling mode under the compression load. However, it is possible to increase the energy dissipation of the joints by utilizing FRP composite through changing the buckling mode to the brace overall buckling.

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