scholarly journals Method of accelerating convergence for gas kinetic algorithm based on digital constitutive relation of macroscopic equations

2020 ◽  
Vol 69 (20) ◽  
pp. 204702
Author(s):  
Xing-Cai Pi ◽  
Lian-Hua Zhu ◽  
Zhi-Hui Li ◽  
Ao-Ping Peng ◽  
Yong-Hao Zhang
Keyword(s):  
Constitutive Relation ◽  
Macroscopic Equations

Eternal Today

2018 ◽  
Author(s):  
Jenni Myllykoski ◽  
Anniina Rantakari
Keyword(s):  
Real Time ◽  
Constitutive Relation ◽  
Human Agency ◽  
Fundamental Characteristic ◽  
Time Study ◽  
Software Company ◽  
Present Experience ◽  
Managerial Strategy ◽  
Over Time ◽  
Strategy Making

This chapter focuses on temporality in managerial strategy making. It adopts an ‘in-time’ view to examine strategy making as the fluidity of the present experience and draws on a longitudinal, real-time study in a small Finnish software company. It shows five manifestations of ‘in-time’ processuality in strategy making, and identifies a temporality paradox that arises from the engagement of managers with two contradictory times: constructed linear ‘over time’ and experienced, becoming ‘in time’. These findings lead to the re-evaluation of the nature of intention in strategy making, and the authors elaborate the constitutive relation between time as ‘the passage of nature’ and human agency. Consequently, they argue that temporality should not be treated merely as an objective background or a subjective managerial orientation, but as a fundamental characteristic of processuality that defines the dynamics of strategy making.

Bimodulus constitutive relation and mesoscopic model of braided composites

2021 ◽  
pp. 114115
Author(s):  
Lanxin Jiang ◽  
Shoune Xiao ◽  
Bing Yang ◽  
Guangwu Yang ◽  
Tao Zhu ◽  
...  
Keyword(s):  
Constitutive Relation ◽  
Braided Composites ◽  
Mesoscopic Model

scholarly journals Micropolar medium in a funnel-shaped crusher

2021 ◽  
Author(s):  
Mariia Fomicheva ◽  
Elena N. Vilchevskaya ◽  
Nikolay Bessonov ◽  
Wolfgang H. Müller
Keyword(s):  
Structural Changes ◽  
Coupled System ◽  
Viscosity Coefficient ◽  
Coupled Flow ◽  
Production Term ◽  
Characteristic Particle ◽  
Implicit Finite Difference ◽  
Micropolar Medium ◽  
Velocity Pressure ◽  
Macroscopic Equations

AbstractIn this paper, the solution to a coupled flow problem for a micropolar medium undergoing structural changes is presented. The structural changes occur because of a grinding of the medium in a funnel-shaped crusher. The standard macroscopic equations for mass and linear momentum are solved in combination with a balance equation for the microinertia tensor containing a production term. The constitutive equations of the medium describe a linear viscous material with a viscosity coefficient depending on the characteristic particle moment of inertia, the so-called microinertia. A coupled system of equations is presented and solved numerically in order to determine the distribution of the fields for velocity, pressure, viscosity coefficient, and microinertia in all points of the continuum. The numerical solution to this problem is found by using the implicit finite difference method and the upwind scheme.

Constitutive Relation of Yunjialing Anthracite Under Medium Strain Rate

2007 ◽  
Vol 17 (1) ◽  
pp. 126-132 ◽  
Author(s):  
Wen-jiao GAO ◽  
Ren-liang SHAN ◽  
Gong-cheng WANG ◽  
Rui-qiang CHENG
Keyword(s):  
Strain Rate ◽  
Constitutive Relation ◽  
Medium Strain Rate

Experimental Study on Bond-Slip Constitutive Relation between CFL and Concrete

2013 ◽  
Vol 302 ◽  
pp. 359-364
Author(s):  
X.H. Zheng ◽  
P.Y. Huang ◽  
X.Y. Guo ◽  
Q. Han
Keyword(s):  
Constitutive Relation ◽  
Displacement Sensor ◽  
Key Factors ◽  
Bond Slip ◽  
Factors Affecting ◽  
Slip Mechanism ◽  
Double Shear ◽  
Carbon Fiber Laminate ◽  
Externally Bonded ◽  
Longitudinal Strains

Externally bonded reinforcing technique with fiber reinforced polymer (FRP) has been widely used in civil engineering. The performance of the interface between FRP and concrete is one of the key factors affecting the behavior of the strengthened structures. This paper presents a detailed study on the bond-slip mechanism between carbon fiber laminate (CFL) and concrete based on double-shear tests. 8 specimens with different bonded length and width of CFL were tested under static loading. Strain gauges along the CFL face and displacement sensor were used to measure longitudinal strains and slip of the interface. The bond-slip constitutive relation of the interface between CFL and concrete was analyzed with the testing results. Compared with four different bond-slip models, a shear stress-slip model was proposed based on the experimental data.

Design and Analysis of Viscoelastic Seismic Dampers

2002 ◽  
Author(s):  
N. Shimizu ◽  
H. Nasuno ◽  
T. Yazaki ◽  
K. Sunakoda
Keyword(s):  
Finite Element ◽  
Constitutive Relation ◽  
Time Domain ◽  
Dynamic Properties ◽  
Design Procedure ◽  
Fe Analysis ◽  
Damping Capacity ◽  
Element Formulation ◽  
Element Analysis ◽  
Equivalent Viscous Damping

This paper describes a methodology of design and analysis of viscoelastic seismic dampers by means of the time domain finite element analysis. The viscoelastic constitutive relation of material incorporating with the fractional calculus has been derived and the finite element formulation based on the constitutive relation has been developed to analyze the dynamic property of seismic damper. A time domain computer program was developed by using the formulation. Dynamic properties of hysteresis loop, damping capacity, equivalent viscous damping coefficient, and equivalent spring constant are calculated and compared with the experimental results. Remarkable correlation between the FE analysis and the experiment is gained, and consequently the design procedure with the help of the FE analysis has been established.

Thermo-stress coupling field of friction lining during high-speed slide of wire rope in a mine friction-drive hoist

2011 ◽  
Vol 226 (9) ◽  
pp. 2154-2167 ◽  
Author(s):  
Yu-xing Peng ◽  
Zhen-cai Zhu ◽  
Min-ming Tong ◽  
Guo-an Chen ◽  
Yan-hai Cheng ◽  
...  
Keyword(s):  
Theoretical Model ◽  
Contact Zone ◽  
Constitutive Relation ◽  
High Speed ◽  
Thermomechanical Properties ◽  
Element Analysis ◽  
Coupling Field ◽  
Zone Ii ◽  
Coefficient Of Linear Expansion ◽  
Friction Lining

In order to seek the intrinsic reason for the serious high-speed slide accident in a mine hoist, the thermo-stress coupling field of friction lining was studied during the high-speed slide. First, the helical contact characteristics were analysed. Subsequently, the thermomechanical properties and the dynamic coefficient of linear expansion were studied, and the thermomechanical constitutive relation was obtained. Then, the theoretical model of thermo-stress was established with the consideration of the helical contact characteristics and the thermomechanical constitutive relation. Also, the numerical simulation was performed by the finite element analysis. Finally, the experiment was carried out on a friction tester. It is found that the temperature is the highest at the contact zone II and the friction heat focuses on the contact surface layer. The variation frequency of the stress is 6.98 Hz at 0.5 m/s. Besides, the catastrophe for the strain and coefficient of friction occurs at 3 m/s. The thermo-stress concentration occurs at contact zone II. The experiment results agree with the simulation ones, which validates the theoretical model of thermo-stress.

scholarly journals Constitutive Relation of Casting Aluminum Alloy A101 Involving Void Evolution

2005 ◽  
Vol 46 (12) ◽  
pp. 2997-3000 ◽  
Author(s):  
Bin Chen ◽  
Xianghe Peng ◽  
Jinghong Fan ◽  
Songlin Chen
Keyword(s):  
Aluminum Alloy ◽  
Constitutive Relation ◽  
Void Evolution ◽  
Casting Aluminum Alloy ◽  
Casting Aluminum
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