A shear lag analysis predicts the strong size effect on the persistence length of microtubules

2012 ◽  
Vol 101 (9) ◽  
pp. 093708 ◽  
Author(s):  
Bin Chen
Keyword(s):  
Size Effect ◽  
Persistence Length ◽  
Shear Lag ◽  
Strong Size Effect

Size Effect on the Behavior of Thermal Elastohydrodynamic Lubrication of Roller Pairs

2012 ◽  
Vol 134 (1) ◽  
Author(s):  
Xiaoling Liu ◽  
Jinlei Cui ◽  
Peiran Yang
Keyword(s):  
Size Effect ◽  
Newtonian Fluid ◽  
Effective Viscosity ◽  
Numerical Solutions ◽  
Elastohydrodynamic Lubrication ◽  
Operating Conditions ◽  
Load Parameter ◽  
Performance Results ◽  
Thermal Ehl ◽  
Strong Size Effect

In order to investigate the size effect on elastohydrodynamic lubrication (EHL) of roller pairs, complete numerical solutions for both the Newtonian fluid and the Eyring fluid thermal EHL problems of roller pairs under steady state conditions have been achieved. It can be seen that there is no size effect on the isothermal EHL performance; however, there is a very strong size effect on the thermal EHL performance. Results show that the term of shearing heat is the most important factor for the film temperature when the size of a contact changes. Comparison between the Newtonian solution and the Eyring solution has been made under some operating conditions. It is interesting to see that the effective viscosity of the Eyring fluid is nearly the same as that of the Newtonian fluid when the size of a contact is large enough. The non-Newtonian effect, therefore, can be ignored when the size of a contact is very large. It is equally interesting to see that the thermal effect can be ignored when the size of a contact is very small. In addition, the influence of the velocity parameter, the load parameter, and the slide-roll ratio on the lubricating performance for various sizes of contacts has been investigated.

Ab initio investigation of supported Au–Mn nanowires

2017 ◽  
Vol 31 (13) ◽  
pp. 1750142 ◽  
Author(s):  
K. M. Tsysar ◽  
S. V. Kolesnikov ◽  
I. I. Sitnikov ◽  
A. M. Saletsky
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Critical Temperature ◽  
Size Effect ◽  
Ab Initio ◽  
Kinetic Monte Carlo ◽  
Magnetic Moments ◽  
Ab Initio Study ◽  
Kinetic Monte Carlo Simulation ◽  
Strong Size Effect

We present an ab initio study of surface supported Au–Mn nanowires. Three different substrates are discussed: Cu(110), stepped Cu(111) and Si(001) surface. The emergence of stable antiferromagnetic (AFM) solutions in Au–Mn nanowires was found in all three cases. We found the nonzero magnetic moments of Mn atoms, however, the bulk of manganese is paramagnetic. The critical temperature of the Au–Mn wires is calculated by means of kinetic Monte Carlo simulation. The strong size-effect of the critical temperature is demonstrated.

Different Relaxation Modes of Epitaxial Thin Film Alloys With A Large Size Effect

1999 ◽  
Vol 578 ◽  
Author(s):  
J. Thibault ◽  
C. Dressler ◽  
P. Bayle-Guillemaud
Keyword(s):  
Thin Film ◽  
Phase Transformation ◽  
Stress Relaxation ◽  
Size Effect ◽  
Driving Force ◽  
Epitaxial Thin Film ◽  
Large Size ◽  
Relaxation Modes ◽  
Large Size Effect ◽  
Strong Size Effect

AbstractIn epitaxial layers, the mechanism of stress relaxation under consideration is in general dislocations. This paper will present experimental evidences for other modes of relaxation. which may occur in some situations especially where a strong size effect or misfit is present. In fact the stress is the driving force for intermixing, twinning, and phase transformation, which are not expected to occur in the bulk. All these experimental results have been sustained by numerical simulations that will also be presented.

The effect of size and other economic factors on the expense rate behaviour of UK life insurance companies

1983 ◽  
Vol 110 (2) ◽  
pp. 383-388 ◽  
Author(s):  
P. D. Praetz
Keyword(s):  
Size Effect ◽  
Life Insurance ◽  
Insurance Companies ◽  
Economic Factors ◽  
Relevant Research ◽  
Empirical Results ◽  
Life Assurance ◽  
Control Output ◽  
Rate Behaviour ◽  
Strong Size Effect

This paper finds a strong size effect for the total business of 106 U.K. life companies from the 1981–82 Insurance Directory and Year Book.The industry is regulated by the 1982 Insurance Companies Act which consolidated earlier legislation. This does not control output or prices of firms but many other items including investment. The industry is not highly concentrated with the five largest firms in 1980 with 30% of premiums. In 1980, total ordinary branch premiums amounted to £5.8 billion.Section 2 surveys briefly some relevant research, while §3 discusses the data and size and other economic factors for life assurance firms. Section 4 discusses the empirical results while §5 has a brief conclusion.

scholarly journals Research on Parameter Optimization of Micro-Milling Al7075 Based on Edge-Size-Effect

Micromachines ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 197 ◽  
Author(s):  
Yinghua Chen ◽  
Tao Wang ◽  
Guoqing Zhang
Keyword(s):  
Size Effect ◽  
Surface Quality ◽  
Cutting Parameters ◽  
Micro Milling ◽  
Milling Force ◽  
Milling Tool ◽  
Cutting Parameters Optimization ◽  
Strong Size Effect ◽  
Edge Size

In the process of micro-milling, the appearance of the edge-size-effect of micro-milling tools cannot be ignored when the cutting parameters are smaller than the cutting edge arc radius (r0) of the micro-milling tool or close to it, and it could easily lead to low cutting efficiency and poor surface quality of the micro-slot. Through micro-milling experiments on Al7075-T6 materials, the change of milling force in the plough zone and shear zone during micro-milling was studied, and the minimum cutting thickness (hmin) range was determined to be 0.2r0–0.4r0 based on r0 of the micro-milling tool. Subsequently, the effect of fz/r0 (fz denotes feed rate per tooth) on the top burr formation of the micro-slot, the surface roughness (Ra) of the micro-slot bottom, and the milling force was studied, and a size-effect band of micro milling was established to determine the strong size-effect zone, transition size-effect zone, and the weak size-effect zone. Finally, two different fz/r0 in the strong size-effect zone and the weak size-effect zone are compared, which proves that the main purpose of the cutting parameters optimization of micro-milling is to avoid cutting parameters locating in the strong edge-size-effect zone. The above conclusions provide a theoretical basis for the selection of micro-milling cutting parameters, and an important reference in improving the surface quality of micro-milling.

Statistical shear lag model – Unraveling the size effect in hierarchical composites

2015 ◽  
Vol 18 ◽  
pp. 206-212 ◽  
Author(s):  
Xiaoding Wei ◽  
Tobin Filleter ◽  
Horacio D. Espinosa
Keyword(s):  
Size Effect ◽  
Shear Lag ◽  
Shear Lag Model ◽  
Hierarchical Composites ◽  
Lag Model
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