Analysis of Constrained Filament Deformation and Stiffness Properties of Brushes

1989 ◽  
Vol 111 (3) ◽  
pp. 238-243 ◽  
Author(s):  
R. J. Stango ◽  
S. M. Heinrich ◽  
C. Y. Shia
Keyword(s):  
Contact Zone ◽  
Surface Finish ◽  
Smooth Surface ◽  
Analytical Procedure ◽  
Force Distribution ◽  
Distribution Characteristics ◽  
Kinematic Constraints ◽  
Stiffness Properties ◽  
Mechanics Analysis ◽  
The Relationship

In this paper, an analytical procedure is developed for evaluating the filament loading, constrained elastic deformation, and overall stiffness of a circular brush, Filament deformation is computed on the basis of a large displacement mechanics analysis in conjunction with kinematic constraints for a flat, rigid workpart with smooth surface finish. Numerical results are reported which examine the relationship between workpart penetration, brush stiffness, and force distribution characteristics of the workpart contact zone.

Effect of Workpart Curvature on the Stiffness Properties of Circular Filamentary Brushes

1991 ◽  
Vol 113 (3) ◽  
pp. 276-282 ◽  
Author(s):  
S. M. Heinrich ◽  
R. J. Stango ◽  
Chih Yuan Shia
Keyword(s):  
Contact Zone ◽  
Constant Curvature ◽  
Kinematic Constraints ◽  
Numerical Examples ◽  
Response Characteristics ◽  
Stiffness Properties ◽  
Large Filament

In this paper the role which workpart geometry plays in the stiffness properties and contact zone characteristics of circular filamentary brushes is investigated. The problem is examined by employing a recently developed mechanics-based procedure for evaluating large filament deformation, in conjunction with appropriate kinematic constraints for filament tip contact with a smooth, rigid workpart of prescribed constant curvature. Numerical examples for a circular filamentary brush system are presented and discussed for the purpose of illustrating the basic nature of brush stiffness response characteristics for a range of prescribed constant-curvature workpart surfaces.

Cinema, colonialism, and contact zone: the movie theater and city governance in early-twentieth-century Shanghai

2021 ◽  
pp. 1-19
Author(s):  
Qiliang He ◽  
Jie Tan
Keyword(s):  
Twentieth Century ◽  
Contact Zone ◽  
Film Studies ◽  
Public Spaces ◽  
Colonial Power ◽  
Government Officials ◽  
Municipal Council ◽  
Movie Theater ◽  
City Governance ◽  
The Relationship

Abstract Moving away from the text-centered paradigm in film studies, the present research explores the relationship between the growing popularity of the film in Shanghai during the first two decades of the twentieth century and city governance in the International Settlement. It argues that the rise of movie halls contributed to creating a new kind of crowd that blended Chinese moviegoers with non-Chinese viewers. The emergence of the cinema as a space where people of different racial and ethnic origins encountered impelled the Shanghai Municipal Council – the governing body of the International Settlement in Shanghai – to respond by implementing new measures of public safety and altering its decades-long unspoken rules of segregation in the realm of everyday life. For Chinese enlightenment intellectuals and government officials, meanwhile, anxiety over their fellow Chinese's lack of basic decorum in public spaces arose with the intense intermingling of Chinese and non-Chinese filmgoers under the same roof. Thus, the cinema became a “contact zone” – a space of asymmetrical relations resulting not necessarily from colonists' exercise of colonial power but from the Chinese elite's wrapping of the discussion of movie theater etiquette reform within a political and ideological framework of modernization, patriotism, and anti-imperialism.

Study of the Relationship between Tool Wear and Surface Finish in Turning with Carbide Tool

2014 ◽  
Vol 902 ◽  
pp. 95-100 ◽  
Author(s):  
Heraldo J. Amorim ◽  
Augusto O. Kunrath Neto
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Surface Finish ◽  
Cutting Speed ◽  
Single Equation ◽  
Carbon Steels ◽  
High Dispersion ◽  
Exponential Relationship ◽  
Processed Material ◽  
The Relationship

The aim of this work is to analyze the tool wear effects on surface finish of machined components. Long-term machinability tests were performed for ASTM 1040 and 1045 carbon steels with carbide tools, in which tool wear and surface roughness were periodically evaluated. Surface finish was analyzed as a function of processed material and cutting speed with new machining tool, and a significant influence was found for cutting speed at a confidence interval of 10%. When evaluated as a function of time and tool wear, surface roughness showed an exponential relationship with both variables. However, a high dispersion occurs close to the end of tool life, especially for AISI 1040 steel. Weak influence of cutting speed (for the range of speeds tested) was observed on the relationship between tool wear and surface finish, indicating that a single equation can describe its behavior for all studied conditions. The relationship between the surface roughness and the cutting time was found to be stronger for the ABNT 1040 steel.

The Effect of Surface Finish on Zinc Whisker Growth

2012 ◽  
Vol 472-475 ◽  
pp. 2756-2759
Author(s):  
Wen Cui ◽  
Shao Jun Qi
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Surface Finish ◽  
Whisker Growth ◽  
Experimental Conditions ◽  
Steel Substrates ◽  
The Relationship ◽  
Rough Surface Finish ◽  
Scanning Electron ◽  
Effect Of Surface

To understand the relationship between surface finish and zinc whisker growth, this study investigated the growth of whiskers on two mild steel substrates of different surface finish by Field Emission Gun Scanning Electron Microscope (FEG SEM). Results show that, under the same experimental conditions, deposits on substrates with a mirror finish grew less whiskers and nodules than substrates with a rough surface finish.

scholarly journals Modeling the Distribution Characteristics of Urban Public Bicycle Rental Duration

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Shuichao Zhang ◽  
Kangkang He ◽  
Sheng Dong ◽  
Jibiao Zhou
Keyword(s):  
Theoretical Model ◽  
Radioactive Decay ◽  
Distribution Characteristics ◽  
Theoretical Support ◽  
Study Results ◽  
Basic Parameters ◽  
The Relationship

In order to model the distribution characteristics of public bicycle rental durations, individual journey data for three cities in China (Ningbo, Hangzhou, and Beijing), for weekdays, was obtained. The distribution curves for public bicycle rental duration in the three cities were found to be extremely similar, with small differences among the weekdays. The basic parameters such as the average rental duration, the rental duration corresponding to the maximum rental frequency, and the rental duration corresponding to 75% degree were then calculated. On this basis, the radioactive decay law from physics was used to establish a theoretical model for the relationship between rental frequency and rental duration. The data on public bicycle rental duration in Ningbo, Hangzhou, and Beijing were used to test the model and produce a corrected theoretical model. The results indicate that the relationship between rental frequency and rental duration obeys the decay law. The study results provide important theoretical support for the rental station planning of bicycle sharing systems, as well as the allocation, operation, and dispatch of public bicycles.

scholarly journals Contact zones: Multispecies scholarship throughImperial Eyes

2019 ◽  
Vol 2 (4) ◽  
pp. 712-731 ◽  
Author(s):  
Helen F Wilson
Keyword(s):  
Discourse Analysis ◽  
Contact Zone ◽  
Human Life ◽  
Contact Zones ◽  
Colonial Histories ◽  
The Relationship ◽  
Forms Of Knowledge ◽  
Do So

The contact zone is described as the space of imperial encounter. Against a backdrop of work that has used Mary Louise Pratt's concept of the contact zone to examine culture-making, and destabilize normative understandings of division, distinction, and bordering, the paper interrogates the value of utilizing the concept in multispecies contexts. To do so, the paper considers the relationship between the contact zone and the concept of encounter, noting how they overlap and depart as approaches to questioning embodied difference, colonial histories, and immanent potential. Turning to the BBC documentary series Blue Planet II, the paper uses the concept of the contact zone and discourse analysis to examine its dominant ideas, frontiers of difference, and the means through which alternative geographies are both foreclosed and enabled. It demonstrates how the concept of the contact zone can draw attention to the ocean as the documentary's site of production, where different forms of knowledge, technology, people, elements, and non-human life grapple with each other in conditions of uneven power. In moving between narrative and oceanic contact zones, the paper raises questions about practices of knowledge-making, uneven structures of power, and decipherability, to demonstrate what can be gained from staying with the postcolonial framing of the contact zone as a critical tool of analysis in multispecies scholarship.

The relationship between foot arch flexibility and medial-lateral ground reaction force distribution

2019 ◽  
Vol 69 ◽  
pp. 46-49 ◽  
Author(s):  
Rebecca Zifchock ◽  
Regina Parker ◽  
Willahelm Wan ◽  
Michael Neary ◽  
Jinsup Song ◽  
...  
Keyword(s):  
Ground Reaction Force ◽  
Reaction Force ◽  
Force Distribution ◽  
Foot Arch ◽  
The Relationship

Grinding Energy Distributions and Wear Behaviors of Grain Cutting Edges in cBN Deep Grinding

2020 ◽  
Vol 14 (1) ◽  
pp. 59-65
Author(s):  
Masakazu Fujimoto ◽  
◽  
Yuka Hiraizumi ◽  
Kazutaka Hirata ◽  
Susumu Ohishi
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Energy Distribution ◽  
Contact Zone ◽  
Grinding Force ◽  
Force Distribution ◽  
Energy Distributions ◽  
Distribution Form ◽  
Edge Wear ◽  
Scanning Electron

This paper deals with the grinding energy distributions in wheel-workpiece contact zone and the wear behaviors of grain cutting edges in cBN deep grinding. By measuring the tangential grinding force distribution in the grinding zone, the grinding energy distribution form could be approximated to be triangular. However, the grinding energy distribution forms changed a little occurring workpiece burn. The wear behaviors of the grain cutting edges were observed by a Scanning Electron Microscope (SEM) and quantitatively evaluated in terms of attritious wear flat percentage. It is shown that the variation of the grinding energy distributions has an effect on the cutting edge wear characteristics.

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