Contact Analysis for Contact Thermoforming of PMMA Sheet

2020 ◽  
Vol 9 (2) ◽  
pp. 20190117
Author(s):  
Jeet P. Patil ◽  
Yogesh S. Gaikhe ◽  
Vilas Nandedkar ◽  
Sushil K. Mishra ◽  
Sandip K. Saha
Keyword(s):  
Contact Analysis ◽  
Pmma Sheet

scholarly journals Strategy for fast manufacturing of 3D hydrodynamic focusing multilayer microfluidic chips and its application for flow-based synthesis of gold nanoparticles

2021 ◽  
Vol 25 (8) ◽  
Author(s):  
Yanwei Wang ◽  
Michael Seidel
Keyword(s):  
Gold Nanoparticles ◽  
Microfluidic Devices ◽  
Microfluidic Chips ◽  
Proof Of Concept ◽  
Hydrodynamic Focusing ◽  
Pressure Sensitive Adhesive ◽  
Pmma Sheet ◽  
Pressure Sensitive ◽  
Working Device ◽  
Channel Structures

AbstractFabrication of 3D microfluidic devices is normally quite expensive and tedious. A strategy was established to rapidly and effectively produce multilayer 3D microfluidic chips which are made of two layers of poly(methyl methacrylate) (PMMA) sheets and three layers of double-sided pressure sensitive adhesive (PSA) tapes. The channel structures were cut in each layer by cutting plotter before assembly. The structured channels were covered by a PMMA sheet on top and a PMMA carrier which contained threads to connect with tubing. A large variety of PMMA slides and PSA tapes can easily be designed and cut with the help of a cutting plotter. The microfluidic chip was manually assembled by a simple lamination process.The complete fabrication process from device design concept to working device can be completed in minutes without the need of expensive equipment such as laser, thermal lamination, and cleanroom. This rapid frabrication method was applied for design of a 3D hydrodynamic focusing device for synthesis of gold nanoparticles (AuNPs) as proof-of-concept. The fouling of AuNPs was prevented by means of a sheath flow. Different parameters such as flow rate and concentration of reagents were controlled to achieve AuNPs of various sizes. The sheet-based fabrication method offers a possibility to create complex microfluidic devices in a rapid, cheap and easy way.

Comparative study of stress analysis of gears with different helix angle using the ISO 6336 standard and tooth contact analysis methods

2016 ◽  
Vol 230 (7-8) ◽  
pp. 1350-1358 ◽  
Author(s):  
Layue Zhao ◽  
Robert C Frazer ◽  
Brian Shaw
Keyword(s):  
Stress Analysis ◽  
Contact Stress ◽  
Helix Angle ◽  
Contact Analysis ◽  
Bending Stress ◽  
Contact Ratio ◽  
Tooth Contact Analysis ◽  
Tooth Contact ◽  
Iso Standard ◽  
Analysis Methods

With increasing demand for high speed and high power density gear applications, the need to optimise gears for minimum stress, noise and vibration becomes increasingly important. ISO 6336 contact and bending stress analysis are used to determine the surface load capacity and tooth bending strength but dates back to 1956 and although it is constantly being updated, a review of its performance is sensible. Methods to optimise gear performance include the selection of helix angle and tooth depth to optimise overlap ratio and transverse contact ratio and thus the performance of ISO 6336 and tooth contact analysis methods requires confirmation. This paper reviews the contact and bending stress predicted with four involute gear geometries and proposes recommendations for stress calculations, including a modification to contact ratio factor Zɛ which is used to predict contact stress and revisions to form factor YF and helix angle factor Yβ which are cited to evaluate bending stress. The results suggest that there are some significant deviations in predicted bending and contact stress values between proposal methods and original ISO standard. However, before the ISO standard is changed, the paper recommends that allowable stress numbers published in ISO 6336-5 are reviewed because the mechanisms that initiate bending and contact fatigue have also changed and these require updating.

A linear programming formulation for incremental contact analysis

1995 ◽  
Vol 38 (16) ◽  
pp. 2703-2725 ◽  
Author(s):  
Srdan Šimunović ◽  
Sunil Saigal
Keyword(s):  
Linear Programming ◽  
Contact Analysis ◽  
Programming Formulation ◽  
Linear Programming Formulation

Simulation and Experimental Measurement of the Transmission Error of Real Hypoid Gears Under Load

2000 ◽  
Vol 122 (1) ◽  
pp. 109-122 ◽  
Author(s):  
Claude Gosselin ◽  
Thierry Guertin ◽  
Didier Remond ◽  
Yves Jean
Keyword(s):  
Measurement Data ◽  
Simulation Models ◽  
Transmission Error ◽  
Contact Analysis ◽  
Hypoid Gear ◽  
Tooth Contact Analysis ◽  
Tooth Contact ◽  
Hypoid Gears ◽  
Loaded Tooth Contact Analysis ◽  
Analysis Models

The Transmission Error and Bearing Pattern of a gear set are fundamental aspects of its meshing behavior. To assess the validity of gear simulation models, the Transmission Error and Bearing Pattern of a Formate Hypoid gear set are measured under a variety of operating positions and applied loads. Measurement data are compared to simulation results of Tooth Contact Analysis and Loaded Tooth Contact Analysis models, and show excellent agreement for the considered test gear set. [S1050-0472(00)00901-6]

Experimental investigation on laser milling of PMMA sheet

2014 ◽  
Author(s):  
S. Genna ◽  
C. Leone ◽  
V. Lopresto ◽  
V. Tagliaferri
Keyword(s):  
Experimental Investigation ◽  
Pmma Sheet ◽  
Laser Milling

A method for shell contact analysis

1981 ◽  
Vol 26 (2) ◽  
pp. 181-195 ◽  
Author(s):  
J.T. Tielking ◽  
R.A. Schapery
Keyword(s):  
Contact Analysis

Three-dimensional Contact Analysis for a Stiffened Plate Panel Using the Node-to-segment Area Regularization

2022 ◽  
Author(s):  
Seokmin Lee ◽  
Seung Hoon Kang ◽  
Sang Joon Shin
Keyword(s):  
Three Dimensional ◽  
Contact Analysis ◽  
Stiffened Plate
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