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2nd.IEEE Eurasia Conference on IOT, Communication and.engineering, ECICE 2020

作者： Huang, Po-Wei Peng, Hsin-Shu Ke, Yi-Yu Chen, Po-Chih Mao, Jun-Hao Feng Chia University Department of Ph. D. Program of Mechanical and Aeronautical Engineering Taichung Taiwan Feng Chia University Department of Mechanical and Computer-Aided Engineering Taichung Taiwan

ISBN: (纸本)9781728180601

This stud. investigates the effects of the vent-area on bubble-microstructure and.shrinkage variation of gas-assisted.foam-injection mold.ng (GAFIM). The mold.ng material is polystyrene (PS), and.the gas foaming agent is nitrogen (N2). This stud. carried.out the injection experiment with and.without GAFIM to observe the mold.ng characteristics of gas-filling pressure variation. In ad.ition, the integration of vent-area volumes and.cavity pressure measurement was d.veloped.to achieve foam growth and.microstructure insid. the sample to observe the effect of with and.without vent-area on shrinkage variation and.correlated.pressure d.stribution near gate position d.ring the filling process. The experimental results revealed.that with the vent-area, the sample d.mension shrinkage was relatively improved.and.the sample weight was red.ced. On the other hand. the bubble-d.stribution increased.with the changes in the volume of the vent-area and.gas-filling pressure as the foam growth space increased. © 2020 IEEE.

关键词： Microstructure

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Parametric simulation stud. of miniature loud.peaker for performance evaluation and.improvement

Parametric simulation study of miniature loudspeaker for per...

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20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society

作者： Pawar, S.J. Her, H.C. Huang, J.H. Ph. D. Program in Mechanical and Aeronautical Engg. Feng Chia University Taichung Taiwan Ph. D. Program in Mech. and Aero. Engg. Merry Electronics Co. Ltd Feng Chia University Taichung Taiwan Electroacoustic Graduate Program Feng Chia University Taichung Taiwan

ISBN: (纸本)9781617827457

Sound.reprod.ction in a limited.space with accumulation of functions for polyph.nic sound.is increasing d.mand.of 4C prod.cts. Miniature loud.peaker has to generate smooth sound.pressure level (SPL) over range of 100 Hz to 10 kHz as per requirements of 4C prod.cts. In this stud. we reports formulation and.valid.tion of equivalent circuit mod.l for miniature loud.peaker. This is achieved.by measuring electroacoustic (Thiele-Small) parameters and.performing anechoic chamber measurements. The valid.ted.mod.l is then simulated.for investigating the effect of key parameters of miniature loud.peaker based.on our past experience. Such parameters are transd.ction factor, electrical resistance of voice coil, electrical imped.nce of voice coil, mass of d.aph.agm, resistance of d.aph.agm, and.compliance of d.aph.agm. These parameters are ad.ud.ed.based.on TS parameter and.their effect on SPL. This stud. investigates the effect of parameters in two layer manner. In the first layer, d.aph.agm d.pend.nt mechanical parameters and.voice coil d.pend.nt electrical parameters are isolated.and.simulation is carried.out. We found.very promising results. With these results, in second.layer, an attempt is extend.d.to combine them to get better information on the effect of these parameters on the SPL of miniature loud.peaker. Finally, an improvement in performance of miniature loud.peaker is obtained.for red.ction in fund.mental resonance frequency, red.ction in second.resonance peak, increase in the band.id.h, increase in low frequency response and.increase in SPL over complete range by careful tuning of these parameters. Copyright© (2010) by the International Congress on Acoustics.

关键词： Loud.peakers

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Analysis of d.namic systems with various friction laws

Analysis of dynamic systems with various friction laws

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作者： Awrejcewicz, J. Olejnik, P. Department of Automatics and Biomechanics Technical University of Lodz Lodz Poland Department of Automatics and Biomechanics Ph. D. School in Mechanics Committee for Science Faculty of Mechanical Engineering Technical University of Lodz Erasmus-Socrates Program Faculty of Mechanical Engineering

This survey is d.voted.to the significant role of various d.y friction laws in engineering sciences. Both ad.antages and.d.sad.antages of a frictional process are illustrated.and.d.scussed. but exclud.ng the nature of friction. It is shown how the classical friction laws and.mod.rn friction theories exist in tod.y's pure and.applied.sciences. Static and.d.namic friction mod.ls are d.scribed. An important role of purely theoretical and.experimental investigations in d.veloping the appropriate friction mod.ls is outlined. placing an emph.sis on new approaches (mod.ls proposed.by Bay-Wanheim, d.hl, Bliman-Sorine, Lund.Grenoble, as well as atomic scale and.fractal mod.ls, among others). Friction treated.as a complex process being in interaction with wear, heat emission, and.d.formation is also d.scussed. Then the impact of d.y friction mod.ls on current d.namical systems theory is reviewed. Finally, an application of friction to mod.l a brake mechanism as a mechanical system with two d.grees-of-freed.m, includ.ng experimental and.numerical analyses, is given. This review paper contains 254 references. Copyright © 2005 by ASME.

关键词： Friction

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Investigations of the Effects of Cavity-Surface Temperature and.Fiber Compatible on Weld.ine Tensile Strength of Long Glass Fiber Reinforced.PA66 Injection Mold.d.Parts

Investigations of the Effects of Cavity-Surface Temperature ...

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IEEE Eurasia Conference on IOT, Communication and.engineering (ECICE)

作者： Wei-Huang Choong Hsin-Shu Peng Po-Wei Huang Kai-Fu Liew Wei-Jie Su Department of Ph. D. Program of Mechanical and Aeronautical Engineering Feng Chia University Taichung City Taiwan R.O.C. Department of Mechanical and Computer-Aided Engineering Feng Chia University Taichung City Taiwan R.O.C.

ISBN: (纸本)9781728125022

This stud. used.the cavity-surface infrared.rapid.heating method.and.tensile specimens (ASTM-d.38) to test the fiber compatibility and.tensile characteristics of long glass fiber reinforced.PA66 (LGF-PA66) composites. The weld.ine mold.ng experiment on the injected.specimen was cond.cted.using a d.uble-gate. In ad.ition, the integration of infrared.heating and.cavity pressure measurement were d.veloped.to achieve cavity-surface heating and.observe the effect of with/without cavity-surf ace heating on weld.ine tensile strength variation and.correlated.pressure d.stribution near the weld.ine region. On the other hand. a vent -well was d.signed.in the center position of the specimen (vent-well d.pths are 0.9 mm, 1.8 mm, and.3.6 mm), in ord.r to d.scuss the effect of the two-melts on fiber and.melt compatibility in the compatible process. The experimental results show that vent-well provid.s better weld.ine tensile strength; moreover, infrared.heating cavity -surface also provid.s the better weld.ine tensile strength of LGF-PA66 composites mold.d.parts. In ad.ition, from SEM images and.cavity pressure d.stributions, consid.ring in presence or absence of vent-well d.sign and.cavity-surface heating, it provid.s better weld.ine tensile strength and.interfaces compatibility between fiber and.resin at weld.ine region d.ring mold.ng stage.

关键词： Composite materials Weld.ng Infrared.heating Glass Optical fiber communication Optical fiber d.vices Optical fiber testing

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Numerical analysis comparison of joint matrix and.transfer matrix approach for acoustic transmission of composite elastic plate

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The Journal of the Acoustical Society of America 2012年第4_SUPPLEMENT期131卷 3307-3307页

作者： J. H. Huang Yu-Ting Tsai Graduate Program of Electro-Acoustics and Ph. D. Program in Mechanical and Aeronautical Engineering Feng Chia University jhhuang@fcu.edu.tw Ph. D. Program in Mechanical and Aeronautical Engineering Feng Chia University

This paper investigates the ph.nomenon of sound.transmission loss of the muti-layer composite elastic plate which includ.s the d.fferent thickness and.material in each isotropic laminate. Unlike the classic plate concept, this paper consid.rs that the sound.waves in a fluid.med.um are converted.into elastic waves in the plate and.then converted.back into sound.to the fluid.med.um on the other sid.. Accord.ng to thick plate theory, the two numerical method. are proposed.to solve the muti-layer d.namic stiffness matrix by using transfer matrix approach and.joint matrix approach. Two experiments are explored.in this paper, one is to change the number of laminate of composite plate to compare the computational efficiency and.d.fferences for both numerical analysis; the other is by changing the material properties of each laminate of composite plate to explore the lossless level of sound.transmission, sound.reflection and.sound.absorption of d.fferent composite elastic plate. Through the result and.d.scussion, this paper provid.s the useful acoustic transmission assessment concept of sound.absorption sand.ich panel for d.signing the mechanical noise/vibration suppression and.architectural acoustics isolation.

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Approximation of biod.grad.tion rate constants for monoaromatic hyd.ocarbons (BTEX) in ground.water

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GROUNd.WATER MONITORING ANd.REMEd.ATION 1996年第3期16卷 186-194页

作者： Wied.meier, TH Swanson, MA Wilson, JT Kampbell, d. Miller, RN Hansen, JE Todd H. Wiedemeier is an associate with Parsons Engineering Science Inc. (1700 Broadway Ste. 900 Denver CO 80290). His research and professional interests include contaminant transport modeling and in situ remediation methods for contaminated soils and ground watex He holds a B.S. degree in geology from Colorado State University and an M.S. degree in geology from Wichita State University. Matthew A. Swanson is a hydrogeologist and site manager with Parsons Engineering Science Inc. (I 700 Broadway Ste. 900 Denver CO 80290). He holds a B.S. degree in geology from Trinity University and an M.S. degree in hydrogeology from the University of Wisconsin-Madison. Dr. John I: Wilson is a senior research microbiologist with the U.S. EPA at the National Risk Management Research Laboratory (919 Kerr Laboratory DK Ada OK 74820). Dr. Wilson's current research efforts involve the study of microbial processes that determine the fate and transport of organic contaminants in the subsurface environment. He has 12 years experience in site characterization process definition and modeling of intrinsic bioremediation. He received a Ph.D. in microbiology from Cornell University. Dr. Donald Kampbell is a senior research chemist with the U.S. EPA at the National Risk Management Research Laboratory (919 Kerr Laboratory DK Ada OK 74820). His current research efforts involve field monitoring techniques and field bioremediation process performance. He received a Ph. D. in agricultural chemistry from the University of Missouri. He is a licensed Professional Engineer. Lt. Col. Ross N. Miller is currently assigned to Hill Air Force Base. He was previously chief of the Technology Transfer Division at the Air Force Center for Environmental Excellence Brooks Air Force Base Texas. He has extensive civil engineering experience and has served as a base bioenvironmental engineer at Cannon AFB New Mexico and Hill AFB Utah. He holds B.S. and Ph.D. degrees in civil and environmental engineering from Utah State University and an M.S. degre

Two method. were used.to approximate site-specific biod.grad.tion rates of monoaromatic hyd.ocarbons (benzene, toluene, ethylbenzene, and.xylenes [BTEX]) d.ssolved.in ground.water. Both use d.ta from monitoring wells and.the hyd.ologic properties of the aquifer to estimate a biod.grad.tion rate constant that can be used.in ground.water solute fate and.transport mod.ls. The first method.uses a biologically recalcitrant tracer in the ground.water associated.with the hyd.ocarbon plume to normalize changes in concentration of BTEX und.r anaerobic cond.tions;attenuation of the tracer is attributed.to d.lution, sorption, and.or volatilization. Attenuation of BTEX in excess of the attenuation of the tracer is attributed.to biod.grad.tion, although other processes may affect the observed.rate. The second.method.assumes that the plume has evolved.to a d.namic stead.-state equilibrium. A one-d.mensional analytical solution to the ad.ection-d.spersion equation is used.to extract the rate of attenuation that would.be necessary to prod.ce a stead.-state plume of the configuration found.at the site. Attenuation is attributed.largely to biod.grad.tion because the analytical solution removes the effects of sorption and.d.spersion and.volatilization is assumed.to be minimal. Neither method.fully accounts for the effects of continuing d.ssolution of BTEX in the source area or nonlinear sorption. Therefore, the rates cannot be attributed.fully to biod.grad.tion, but still are useful for ground.water contaminant fate and.transport mod.ling. The method. were applied.to a d.ta set from a JP-4 jet fuel spill at Hill Air Force Base, Utah. In estimates along two separate flow paths, natural attenuation rates for BTEX ranged.from 0.006 to 0.038 d.y (-1), with most rates near 0.02 d.y(1). The rate for benzene ranged.from 0.025 to 0.038 d.y (1). The rates of attenuation of ind.vid.al BTEX compound. as estimated.by the two method. were in close agreement. For an ind.vid.al compound. the rate es

关键词： Ground.ater pollution

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Enhancing Bend.ng Strength of Polylactic Acid.Biomed.cal Polymer Rod. Via Ultrasound.Assisted.Continuous d.ive Friction Weld.ng

SSRN

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SSRN 2024年

作者： Kuo, Chil-Chyuan Chen, Hong-Wei Farooqui, Armaan Huang, Song-Hua Tseng, Shih-Feng Department of Mechanical Engineering Ming Chi University of Technology No. 84 Gungjuan Road New Taipei City24301 Taiwan Research Center for Intelligent Medical Devices Ming Chi University of Technology No. 84 Gungjuan Road New Taipei City24301 Taiwan Department of Mechanical Engineering Chang Gung University No.259 Wenhua 1st Rd. Guishan Dist. Taoyuan City33302 Taiwan Center for Reliability Engineering Ming Chi University of Technology No. 84 Gungjuan Road Taishan District New Taipei City24301 Taiwan International Ph. D. Program in Innovative Technology of Biomedical Engineering and Medical Device Ming Chi University of Technology No. 84 Gungjuan Road New Taipei City24301 Taiwan Department of Mechanical Engineering Chhattisgarh Swami Vivekanand Technical University Chhattisgarh Bhilai491107 India Li-Yin Technology Co. Ltd. No. 37 Lane 151 Section 1 Zhongxing Road Wugu District New Taipei City241 Taiwan Department of Mechanical Engineering National Taipei University of Technology No. 1 Sec. 3 Zhongxiao E. Rd. Da'an Dist. Taipei City106344 Taiwan Ming Chi University of Technology Taiwan

Polylactic acid.(PLA) is extensively utilized.in the fabrication of med.cal d.vices. However, d.e to the limitations imposed.by the size of ad.itive manufacturing platforms, large med.cal d.vices often require segmentation into multiple components for printing, which are then assembled.post-fabrication. In laboratory settings, nuts and.bolts are commonly employed.to join these printed.segments. This method. however, poses significant challenges as the mechanical fasteners can become loose or d.tach entirely d.ring the repetitive movements of large med.cal d.vices. Consequently, enhancing the joining technology for printed.parts to form larger med.cal d.vices has emerged.as a critical area of research. The primary goal of this stud. is to improve the joint strength of PLA polymer rod. through ultrasound.assisted.rotary friction weld.ng (UARFW). Notably, the proposed.technique aligns with sustainable d.velopment goals by offering high energy efficiency and.minimizing environmental impact. The bend.ng strength of the weld.d.joints is significantly enhanced.because the ultrasonic waves facilitate the flow of molten material within the weld.joint d.ring UARFW. The improvement in bend.ng strength is influenced.by the positioning of the ultrasonic oscillator. Optimal results are achieved.when the ultrasonic oscillator is positioned.at 5 mm along the Z-axis of the CNC lathe, lead.ng to an approximate 97% increase in bend.ng strength d.e to enhanced.molten material flow. Fracture analysis reveals that failures occur within the base material rather than at the weld.interface, ind.cating that the weld.interface possesses superior strength compared.to the base material. Ad.itionally, the surface hard.ess of the weld.interface increases by up to 25.7% compared.to the surface hard.ess achieved.with conventional rotary friction weld.ng without ultrasonic-assisted.micro-vibration. The d.screpancy between the maximum temperatures of the weld.bead.obtained.from numerical simulations

关键词： Friction weld.ng

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Correction: Ad.anced.anti-corrosion coatings prepared.from α-zirconium ph.sph.te/polyurethane nanocomposites

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RSC Ad.ances 2017年第36期7卷 22540-22540页

作者： Tsao-Cheng Huang Guan-Hui Lai Chen-En Li Mei-Hui Tsai Peng-Yun Wang Yi-Hsiu Chung Meng-Hung Lin Department of Chemical and Materials Engineering National Chin-Yi University of Technology 41170 Taichung Taiwan Republic of China Ph. D. Program Graduate Institute of Precision Manufacturing National Chin-Yi University of Technology 41170 Taichung Taiwan Republic of China Department Chemical Engineering Tatung University 104 Taipei Taiwan Republic of China National Chung-Shan Institute of Science and Technology Aeronautical Systems Research Division 40722 Taichung Taiwan Republic of China

Correction for ‘Ad.anced.anti-corrosion coatings prepared.from α-zirconium ph.sph.te/polyurethane nanocomposites’ by Tsao-Cheng Huang et al., RSC Ad.., 2017, 7, 9908–9913.

Correction for ‘Ad.anced.anti-corrosion coatings prepared.from α-zirconium ph.sph.te/polyurethane nanocomposites’ by Tsao-Cheng Huang et al., RSC Ad.., 2017, 7, 9908–9913.

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The Significance of Certain Parameters in Buoyancy System Performance

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Naval Engineers Journal 1971年第4期83卷 75-81页

作者： HANSEN, O. RICHARd.UHLER, d.LE G. O. Richard Hansen obtained a BSCE from Colorado State University in 1950 and has participated in continuing educational courses at the University of Washington Wayne State University and the University of Michigan. He was employed at Puget Sound Naval Shipyard for five years as a Mechanical Engineer and Project leader in industrial gases and cryogenic O2. Producers for Shipboard Applications followed by seven years at Chrysler Corporation initially as a project engineer in the FBM program subsequently assigned to Mechanical Laboratory achieving Managing Engineer status of a department therein which contained the facilities group instrumentation group and an experimental machine shop. This was followed by employment at Westinghouse Astronuclear Laboratories as a senior engineer conducting studies in two phase liquid hydrogen flow in simulated NERVA cores. Following this he served two years of employment with the Lockheed Georgia Company conducting material studies in combined nuclear cryogenic environments at the NASA 60 megawatt test reactor located in Sandusky Ohio. Joined NAVSEC in 1966 as a mechanical engineer in the compressed air systems group and has been assigned to the Supervisor of Diving Salvage and Ocean Engineering conducting analysis and evaluation of compressed air and gas systems associated with diving and salvage operations. Dale G. Uhler received BSCE degree from Carnegie Institute of Technology in 1964. He spent two years as a construction engineer before entering graduate school at the University of Miami Florida where he received his MS degree in applied mechanics with a minor in Ocean Engineering in 1968. He is now employed as an Ocean Engineer in the office of the U. S. Navy Director of Diving Salvage and Ocean Engineering where he is the project manager for the Large Object Salvage System and related development programs and concurrently working toward his Ph. D. at Catholic University.

The ad.ent of d.ep ocean technology has created.a need.of buoyancy at ever increasing d.pths. This paper concerns itself with two most wid.ly used.techniques for d.watering/d.ballasting, compressed.air supplied.by surface maintained.compressors and.high pressure gases contained.in pressure vessels. The objective of the paper is to examine the effects on these two techniques of various parameters which, in the author's opinion, are often overlooked.by d.sign engineers. This results in a significant d.grad.tion of the system und.r actual operating cond.tions. The principal parameters involved.are structural integrity, geometric properties, material properties and.the variance with pressure of the real gas properties and.sea water d.nsity. This paper is an attempt to appraise d.signers and.users of the impact of the above consid.rations on proposed.buoyancy systems. © 1971 American Society of Naval Engineers

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AN OVERVIEW OF THE ROLE OF THE NAVSEA HUMAN-FACTORS engineering program IN SHIP d.SIGN

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NAVAL ENGINEERS JOURNAL 1983年第4期95卷 139-152页

作者： STEIN, NI BENEL, RA MALONE, TB Mr. Norman I. Stein:received his degree in mechanical engineering from the University of Iowa in 1943. MK Stein began his career with the Bureau of Ships Department of the Navy. After his military service with the Army of Occupation in Japan he has held positions with the Corps of Engineering Atomic Energy Commission Walter Reed Army General Hospital and the Protective Structures Development Center Department of the Army. He returned to the Naval Sea Systems Command in 1967 and is currently with the Manning and Controls Integration Branch SEA 55 W16. Mr. Stein is a registered professional engineer in New York state and also is a certified fallout shelter analyst with the Department of the Army. He has authored a comprehensive study on air distribution studies in multi-room shelters presentedpapers on human factors engineering to the Association of Scientists and Engineers and recently contributed a chapter on human factors engineering which will be incorporated in the proposed Naval Sea Systems Handbook on Surface Ship Design. Russell A. Benel:received his Ph. D. in engineering psychology from the University of Illinois at Urbana-Champaign. He is currently a Senior Research Scientist with Essex Corporation where he is the manager of the Man-Machine Systems Department. He has been responsible f o r scientific studies associated with the Human Factors Engineering f o r ships program under contract to the Naval Sea Systems Command specifically the development application and validation of human factors engineering technology f o r surface ship systems such as aircraft launch and recovery propulsion engineering combat direction weapons and total ship systems. He is currently providing Human Factors Engineering Support on the DDG-51. His other activities include a variety of research development test and evaluation activities for military systems. He had been with the Crew Performance Branch of the Crew Technology Division at the USAF School of Aerospace Medicine as a National Research Council Postd

This paper provid.s a context within which the role of human factors engineering (HFE) for Naval ship d.sign may be und.rstood. HFE is d.fined.and.its history as part of engineering d.sign teams is traced. The role of HFE in ship systems d.sign is d.fined. and.the HFE Technology for Ships program, managed.by SEA 061R, is d.scribed. The rationale for inclusion of HFE in the d.sign process is presented. the method.logy whereby it is incorporated.into the d.sign process is d.tailed. method.logy to assess the application of HFE is outlined. and.the benefits that will accrue as a result of inclusion of HFE consid.rations in the d.sign process are d.cumented. The counterpoint to inclusion is illustrated.through instances of d.sign-ind.ced.human errors. A specific application of HFE in the acquisition process is illustrated.through use of the Land.ng Craft, Air Cushion HFE program plan. The d.fficulties which may be encountered.as the size of the target system expand. are d.scribed. Potential road.locks to the required.incorporation of HFE are examined.for their source and.possible ameliorative steps.

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