Calculation of the elastic ? Plastic behavior of a beam having many protuberances, manufactured from a composite material, and exposed to the simultaneous action of mechanical and thermal stresses

1973 ◽  
Vol 5 (10) ◽  
pp. 1223-1227
Author(s):  
Zh. G. Ovanesova ◽  
V. V. Abramov
Keyword(s):  
Composite Material ◽  
Thermal Stresses ◽  
Simultaneous Action ◽  
Plastic Behavior ◽  
Elastic Plastic

An Experimental Study of the Nano-Scratch Behavior of Cement Composite Material

2011 ◽  
Vol 492 ◽  
pp. 47-54 ◽  
Author(s):  
Jing Xu ◽  
Wu Yao
Keyword(s):  
Composite Material ◽  
Coefficient Of Friction ◽  
Cement Composite ◽  
Scratch Test ◽  
Cement Clinker ◽  
Plastic Behavior ◽  
Soft Matrix ◽  
Elastic Plastic ◽  
The Coefficient Of Friction ◽  
Nano Scratch Test

This paper presents a preliminary exploration in tribological property and dynamic elastic/plastic behavior of cement composite material at micro- and nano- scale. Pastes were prepared by pure cement clinker with water-to-cement ratio of 0.3 and 0.4. For comparison, a polymer-based clinker composite was also introduced. Nano-scratch test was carried out to study the scratch process. Different constituents were identified by penetration depth value. Based on this identification, the coefficient of friction and elastic deformation status were analyzed. Substrate effect was found when refers to the coefficient of friction of hard clinker particles embedded in soft matrix. An H/E ratio dependent elastic/plastic behavior was also revealed for cement composite. The results confirm the nano-scratch test as a promising method for cement composite investigation; however, some important attributes of this type of material, including the complexity of multi-phase structure and the viscous effect, need to be taken into account in experimental analysis and practical application.

Contact Analyses for Bodies With Frictional Heating and Plastic Behavior

2005 ◽  
Vol 127 (2) ◽  
pp. 355-364 ◽  
Author(s):  
Vincent Boucly ◽  
Daniel Ne´lias ◽  
Shuangbiao Liu ◽  
Q. Jane Wang ◽  
Leon M. Keer
Keyword(s):  
Stress Field ◽  
Thermal Stresses ◽  
Frictional Heating ◽  
Equivalent Plastic Strain ◽  
Engineering Application ◽  
Von Mises Stress ◽  
Normal Displacement ◽  
Plastic Behavior ◽  
Important Indicator ◽  
Elastic Plastic

The stress field within machine components is an important indicator for contact failures. Since both thermal stresses due to frictional heating and plasticity are significant in engineering application, it is critical to predict the total stress field. In this work, the steady-state thermal effect is considered and a thermo-elastic–plastic contact model is developed. The model is applicable for rolling and/or sliding contact problem, as far as small equivalent plastic strain hypothesis is respected. Influence coefficients for surface normal displacement, temperature, and strain and stress tensors are used with the discrete convolution and fast Fourier transform algorithm. The single-loop conjugate gradient iteration scheme is also applied to achieve fast convergence speed. Simulations are presented for several academic examples ranging from elastic to thermo-elastic–plastic. The thermo-elastic–plastic analyses show that the heat factor in a contact situation has significant effect not only on the critical Hertzian pressure and on the pressure distribution, but also on the magnitude and depth of the maximum von Mises stress during loading and the residual ones found after unloading.

Elastic-plastic behavior of coldworked holes

1983 ◽  
Author(s):  
H. ARMEN ◽  
A. LEVY ◽  
H. EIDINOFF
Keyword(s):  
Plastic Behavior ◽  
Elastic Plastic

Effect of Defect on Elastic/Plastic and Creep Behavior of Bone: A Finite Element Study

2007 ◽  
Author(s):  
A. Ajdari ◽  
P. K. Canavan ◽  
H. Nayeb-Hashemi ◽  
G. Warner
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Trabecular Bone ◽  
Fatigue Loading ◽  
Dimensional Structure ◽  
Plastic Behavior ◽  
Element Analysis ◽  
Elastic Plastic ◽  
Local Bone ◽  
Osteoporotic Vertebral Fractures

Three-dimensional structure of trabecular bone can be modeled by 2D or 3D Voronoi structure. The effect of missing cell walls on the mechanical properties of 2D honeycombs is a first step towards understanding the effect of local bone resorption due to osteoporosis. In patients with osteoporosis, bone mass is lost first by thinning and then by resorption of the trabeculae [1]. Furthermore, creep response is important to analyze in cellular solids when the temperature is high relative to the melting temperature. For trabecular bone, as body temperature (38 °C) is close to the denaturation temperature of collagen (52 °C), trabecular bone creeps [1]. Over the half of the osteoporotic vertebral fractures that occur in the elderly, are the result of the creep and fatigue loading associated with the activities of daily living [2]. The objective of this work is to understand the effect of missing walls and filled cells on elastic-plastic behavior of both regular hexagonal and non-periodic Voronoi structures using finite element analysis. The results show that the missing walls have a significant effect on overall elastic properties of the cellular structure. For both regular hexagonal and Voronoi materials, the yield strength of the structure decreased by more than 60% by introducing 10% missing walls. In contrast, the results indicate that filled cells have much less effect on the mechanical properties of both regular hexagonal and Voronoi materials.

Thermal Annealing Effect on Elastic-Plastic Behavior of Al-Si-Cu Structural Films Under Uniaxial and Biaxial Tension

2013 ◽  
Vol 22 (6) ◽  
pp. 1414-1427 ◽  
Author(s):  
Takahiro Namazu ◽  
Masayuki Fujii ◽  
Hiroki Fujii ◽  
Kei Masunishi ◽  
Yasushi Tomizawa ◽  
...  
Keyword(s):  
Thermal Annealing ◽  
Biaxial Tension ◽  
Annealing Effect ◽  
Plastic Behavior ◽  
Elastic Plastic

Load Regime Diagram of a Pipe With Cyclically Plastic Bending

2002 ◽  
Author(s):  
Yanping Yao ◽  
Ming-Wan Lu
Keyword(s):  
Axial Force ◽  
Bending Moment ◽  
Boundary Curve ◽  
Plastic Behavior ◽  
Cyclic Bending ◽  
Elastic Plastic ◽  
Linear Elastic ◽  
Load Regime ◽  
Reversed Cyclic ◽  
Cyclic Bending Moment

The criteria of piping seismic design based on linear elastic analysis has been proved to be conservative, which is mainly because the influence of plastic deformation on piping dynamic response is neglected. In the present paper, a pipe under seismic excitation is simplified as an beam with tubular cross section subjected to steady axial force and fully reversed cyclic bending moment, and the elastic-plastic behavior of the pipe is studied. Various behavior of the pipe under different combinations of axial force and cyclic bending moment is discussed and the boundary curve equations between them are obtained. Also the load regime diagram for a pipe which is formed by the boundary curve equations in the loading plane is given, from which the elastic-plastic behavior of the pipe can be determined directly.

scholarly journals ELASTIC-PLASTIC BEHAVIOR OF BUILDING STEEL FRAME INCORPORATIONG STEEL BEARING WALL WITH SLITS

2000 ◽  
Vol 65 (534) ◽  
pp. 153-160 ◽  
Author(s):  
Toko HITAKA ◽  
Chiaki MATSUI ◽  
Keigo TSUDA ◽  
Yoshihide SADAKANE ◽  
Terutake IMAMURA ◽  
...  
Keyword(s):  
Steel Frame ◽  
Plastic Behavior ◽  
Elastic Plastic
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