scholarly journals Characterization and Modeling of Surface Roughness on a Silicon/PZT Unimorph Cantilever using Finite Element Method

2021 ◽  
Author(s):  
Jean Marriz M. Manzano ◽  
Magdaleno R. Vasquez Jr. ◽  
Marc D. Rosales ◽  
Maria Theresa G. de Leon
Keyword(s):  
Finite Element Method ◽  
Surface Roughness ◽  
Finite Element ◽  
Unimorph Cantilever ◽  
Element Method

Heat Transfer at Aluminum-Water Interfaces: Effect of Surface Roughness

2012 ◽  
Author(s):  
H. Sam Huang ◽  
Jennifer L. Wohlwend ◽  
Vikas Varshney ◽  
Ajit K. Roy
Keyword(s):  
Heat Transfer ◽  
Finite Element Method ◽  
Surface Roughness ◽  
Finite Element ◽  
Thermal Conductance ◽  
Md Simulations ◽  
Macroscopic Scale ◽  
Microscopic Scale ◽  
Scale Surface ◽  
Element Method

In this paper, we studied the effect of microscopic surface roughness on heat transfer between aluminum and water by molecular dynamic (MD) simulations and macroscopic surface roughness on heat transfer between aluminum and water by finite element (FE) method. It was observed that as the microscopic scale surface roughness increased, the thermal boundary conductance increased. The thermal conductance increases 20% when the ratio of the amplitude of the surface roughness to the width of the system was changed from 0 to 1. At the macroscopic scale, different degrees of surface roughness were studied by finite element method. The heat transfer was observed to enhance as the surface roughness increases. The surface roughness was found to enhance the heat transfer both at the microscopic scale and at the macroscopic scale. Based upon the calculations at the microscopic scale by MD simulations and at the macroscopic scale by Finite Element method, a procedure was proposed to obtain the thermal conductance of surface roughness at the length scale of macroscopic and able to include the macroscopic scale surface roughness.

Analysis of Knuckle Arm's Fatigue Life

2010 ◽  
Vol 152-153 ◽  
pp. 1346-1350
Author(s):  
Ruo Ping Wang ◽  
Pei Feng ◽  
Yan Qiang Wang
Keyword(s):  
Finite Element Method ◽  
Surface Roughness ◽  
Finite Element ◽  
Fatigue Life ◽  
Surface Quality ◽  
Great Influence ◽  
Simulation Test ◽  
Corrective Measures ◽  
Fillet Radius ◽  
Element Method

The transition fillet radius and surface roughness have a great influence on the part’s fatigue life. In this paper, we analyzed the reasons of a light vehicle’s knuckle arm fracture theoretically by finite element method and took corrective measures such as enlarging the transition fillet and improving the surface quality. After simulation test, we learned that these measures enhance the fatigue life of knuckle arm indeed.

Finite Element Method-Based Machining Simulation for Analyzing Surface Roughness During Turning Operation with HSS and Carbide Insert Tool

2013 ◽  
Vol 38 (6) ◽  
pp. 1615-1623 ◽  
Author(s):  
M. R. Stalin John ◽  
Karuna Shrivastava ◽  
Nilanjan Banerjee ◽  
Prabhu Duttraj Madhukar ◽  
B. K. Vinayagam
Keyword(s):  
Finite Element Method ◽  
Surface Roughness ◽  
Finite Element ◽  
Machining Simulation ◽  
Turning Operation ◽  
Carbide Insert ◽  
Element Method

Effect of surface roughness on the magnetic interaction between micron-sized ferromagnetic particles: Finite element method calculations

2016 ◽  
Vol 28 (8) ◽  
pp. 992-998
Author(s):  
Fernando Vereda ◽  
Juan de Vicente ◽  
Roque Hidalgo-Alvarez
Keyword(s):  
Finite Element Method ◽  
Surface Roughness ◽  
Finite Element ◽  
Magnetic Interaction ◽  
Magnetic Interactions ◽  
Iron Particles ◽  
Square Wave ◽  
Wave Profiles ◽  
Effect Of Surface ◽  
Element Method

We report a finite element method study on the effect of surface roughness on the field-induced magnetization of micrometric iron particles and on the interparticle magnetostatic forces between them. Calculations were carried out for two-dimensional geometries in which particles were modelled as discs. Roughness was introduced as semicircular protrusions or as triangular- or square-wave profiles. Interestingly, we found that increasing amplitudes of the triangular- or square-wave profiles facilitated the magnetization of the particles, resulting in larger interparticle forces at fields below saturation. The effect of the semicircular protrusions and of the spatial frequency of the wave profiles was comparatively small, suggesting that in real systems the effect of particle roughness on magnetic properties may depend on the specific surface morphology. The permeability of the particles also influenced the extent to which roughness facilitated the magnetization process: a larger permeability resulted in larger differences between the magnetization curves of the smooth and the rough particles. Results are relevant to magnetorheological fluids, since we show that surface roughness can affect the magnetic interactions between particles.

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