scholarly journals Mechanical Design of Machine Elements and Machines: A Failure Prevention Perspective

2003 ◽  
Vol 125 (4) ◽  
pp. 854-854 ◽  
Author(s):  
Jack A. Collins, ◽  
David B. Dooner,
Keyword(s):  
Mechanical Design ◽  
Failure Prevention ◽  
Machine Elements

Some Stochastic Mechanical Design Applications

1992 ◽  
Vol 114 (1) ◽  
pp. 42-47 ◽  
Author(s):  
C. R. Mischke
Keyword(s):  
Mechanical Design ◽  
Stochastic Methods ◽  
Strength Data ◽  
Weibull Parameters ◽  
The Third ◽  
Active Constraints ◽  
Stochastic Problems ◽  
Property Data ◽  
Machine Elements ◽  
Machinery Design

This is the third paper in a series relating to stochastic methods in mechanical design. The two previous ones were entitled, “Some Property Data and Corresponding Weibull Parameters for Stochastic Mechanical Design,” and “Fitting Weibull Strength Data and Applying it to Stochastic Mechanical Design.” They presented the groundwork for addressing stochastic problems in machinery design to a reliability goal when strength data are sparse. The purpose of this paper is to utilize procedures for estimating reliability of machine elements when yielding, fracture, or distortion are the limiting or active constraints.

Functional Analysis Diagrams With the Representation of Movement Transitions

2013 ◽  
Author(s):  
Szu-Hung Lee ◽  
Pingfei Jiang ◽  
Peter R. N. Childs ◽  
Keith Gilroy
Keyword(s):  
Functional Analysis ◽  
Conceptual Design ◽  
Design Process ◽  
Mechanical Design ◽  
Functional Requirements ◽  
Design Structure ◽  
Machine Elements ◽  
Physical Elements ◽  
Types Of Information

A study on utilising a graphical interface to represent movement transmission within products has been conducted to support a creative conceptual design process that separates the consideration of functional requirements and motion requirements. In engineering design, many representations of product structure have been proposed to assist in understanding how a design is constituted. However, most of these representations demonstrate only functions and are not able to demonstrate design structure. Functional Analysis Diagrams (FAD) provides a solution for this. An FAD shows not only functions but also physical elements by the network of blocks and arrows and thus it is capable of demonstrating various types of information and the design scheme. This characteristic gives FADs an advantage for designers to combine different types of information including useful and harmful interactions to gain an overview of the design task. This study focuses on using circles instead of arrows to represent movement attributes of mechanisms and machine elements in a Kinematic Functional Analysis Diagram (KFAD) and explores methods of utilising it in mechanical design. A commercial case study of medical equipment design conducted with the assistance of KFADs and a component database, mechanism and machine elements taxonomy (MMET), is described to illustrate the process. The design outcome shows that it is feasible to follow the proposed conceptual design process. With the help of KFADs and the machine elements taxonomy to enable consideration of movements, diverse considerations and design solutions are possible.

scholarly journals Planetary Gearbox Prototype Development and Manufacturing

2021 ◽  
Vol 15 (4) ◽  
pp. 534-540
Author(s):  
Jasmin Smajic ◽  
Isad Saric ◽  
Adil Muminovic ◽  
Muamer Delic ◽  
Adis J. Muminovic
Keyword(s):  
Additive Manufacturing ◽  
Rapid Prototyping ◽  
Mechanical Design ◽  
Low Cost ◽  
Study Program ◽  
Planetary Gearbox ◽  
Prototype Development ◽  
Machine Elements ◽  
Education Of Students ◽  
Education Process

Goal of this research was to develop and manufacture planetary gearbox prototype using rapid prototyping technology (additive manufacturing). Developed prototype was used to visually analyse the design of the planetary gearbox. Also, it was used to improve and innovate education of students on several courses at Mechanical Design study program at Faculty of Mechanical Engineering. It is shown that low cost rapid prototyping technology can be used to manufacture prototypes of complex machines and machine elements. Prototypes manufactured using this technology have same functionality like the real one. Main limitation is the fact that they cannot sustain real world loads and stresses. This paper shows opportunities which low cost rapid prototyping technology is offering in improvement and innovation of education process at engineering schools and faculties. All complex and heavy machines can be manufactured using this type of technology and on that way more precisely presented to the students.

scholarly journals Masalah dan Solusi Alternatif Pembelajaran Perancangan Elemen Mesin

2019 ◽  
Vol 19 (1) ◽  
pp. 83-94
Author(s):  
Edi Septe ◽  
Niswardi Jalinus
Keyword(s):  
Teaching And Learning ◽  
Mechanical Design ◽  
Machine Design ◽  
Google Scholar ◽  
Design Learning ◽  
Hands On ◽  
Machine Elements

Tujuan penulisan artikel ini adalah menemukenali permasalahan dan solusi alternatif dalam perkuliahan Perancangan Elemen Mesin, sehingga dapat dijadikan pedoman dalam pengembangan model pembelajaran selanjutnya. Kajian literatur ini dilakukan melalui penelusuran jurnal dalam lingkup pembelajaran machine design dengan sumber informasi google scholar, www.springer.com, www.elsevier.com, www.sagepub.com dan prosiding konferensi internasional. Dengan kata kunci pencarian: machine design, machine design learning, teaching and learning of machine design, mechanical design, machine elements, diperoleh 100 jurnal dan prosiding terkait, yang diseleksi menjadi 79 jurnal dan prosiding yang memaparkan masalah dan alternatif solusi sesuai materi artikel ini. Hasil kajian memperlihatkan masalah utama dalam pembelajaran Perancangan Elemen Mesin adalah: pembelajaran masih menerapkan metode tradisional, materi kuliah sudah tidak relevan dengan kebutuhan di lapangan, mahasiswa tidak memiliki pengetahuan dan pengalaman awal yang memadai, dosen kurang pengalaman membimbing mahasiswa melaksanakan praktek, rendahnya kemampuan mahasiswa berbahasa Inggris, kurangnya paparan praktis mahasiswa, dan belum ada kerangka yang divalidasi untuk merancang pengembangan instruksional dalam merubah model tradisional desain pembelajaran. Selanjutnya solusi alternatif yang ditawarkan adalah: membuat mahasiswa belajar aktif dan bergeser kemode kerja konkret, materi kuliah diarahkan merancang sistem yang kompleks melalui program rekayasa proyek, mengembangkan model pembelajaran ‘eksperimen bersama’ yang membahas masalah lapangan, kegiatan perancangan dilakukan di laboratorium untuk menerapkan pembelajaran kelas ke lingkungan yang nyata atau dengan modul laboratorium virtual atau simulasi laboratorium interaktif, serta pembelajaran dilakukan dengan pendekatan teknik hands-on berbasis tim, yang memberikan pengalaman praktis kepada mahasiswa dalam perancangan, fabrikasi, dan pengujian sistem mekanis yang kuat dan efisien.

scholarly journals Photorealistic 3D Models and Interactive Learning Content for a Machine Elements E-Course

2021 ◽  
Vol 12 (1) ◽  
pp. 31-42
Author(s):  
Petros Pistofidis ◽  
Pantelis N. Botsaris ◽  
Zacharias Giotsalitis
Keyword(s):  
Engineering Students ◽  
Mechanical Design ◽  
3D Models ◽  
Learning Objects ◽  
Video Training ◽  
Functional Behavior ◽  
Learning Platform ◽  
Machine Elements ◽  
Interactive 3D ◽  
Competencies Development

Production and industrial engineering are domains that increasingly require a sophisticated and multidisciplinary set of skills. As modern educational mechanisms shift towards more advanced patterns of remote and asynchronous training, learning objects have emerged as an ideal application field for monitoring and evaluating the consumption of better composed and enriched content. This article discusses the ability of photorealistic 3D models and interactive 3D objects to support such competencies development and empower engineering perception. Introduced as a complementary dimension of video training, the research invests in photorealism and interactivity to allow the trainee experience with greater control and more detail the functional behavior of machine elements. Structured as exercise material for a lab of mechanical design, photorealistic 3D models were produced and embedded in an e-learning platform for engineering students to evaluate. Their feedback was captured through an extensive questionnaire, allowing for a deeper understanding of the approach's efficiency and results.

The new CM-Series TEMs: integration of a five-axis motorized, fully computer-controlled goniometer

1993 ◽  
Vol 51 ◽  
pp. 258-259
Author(s):  
Marc J.C. de Jong ◽  
P. Emile S.J. Asselbergs ◽  
Max T. Otten
Keyword(s):  
Mechanical Design ◽  
Computer Control ◽  
Objective Lens ◽  
Access Port ◽  
Vibration Stability ◽  
Transmission Electron ◽  
Computer Controlled ◽  
High Degree ◽  
Five Axis ◽  
Five Axes

A new step forward in Transmission Electron Microscopy has been made with the introduction of the CompuStage on the CM-series TEMs: CM120, CM200, CM200 FEG and CM300. This new goniometer has motorization on five axes (X, Y, Z, α, β), all under full computer control by a dedicated microprocessor that is in communication with the main CM processor. Positions on all five axes are read out directly - not via a system counting motor revolutions - thereby providing a high degree of accuracy. The CompuStage enters the octagonal block around the specimen through a single port, allowing the specimen stage to float freely in the vacuum between the objective-lens pole pieces, thereby improving vibration stability and freeing up one access port. Improvements in the mechanical design ensure higher stability with regard to vibration and drift. During stage movement the holder O-ring no longer slides, providing higher drift stability and positioning accuracy as well as better vacuum.

ANALYSIS OF AUTOMATIC TRANSMISSION USING FOURIER TRANSFORM INFRARED (FTIR) SPECTROCOPY

2019 ◽  
Vol 7 (SI-TeMIC18) ◽  
Author(s):  
Norhanifah Abdul Rahman ◽  
Matzaini Katon Katon ◽  
Nurina Alya Zulkifli Zulkifli
Keyword(s):  
Fourier Transform ◽  
Automatic Transmission ◽  
Fourier Transform Infrared ◽  
Oil Analysis ◽  
Wear Particles ◽  
Reliable Technique ◽  
Fluid Analysis ◽  
Analysis Technique ◽  
Machine Elements ◽  
Transmission Fluid

Automatic Transmission (AT) system is efficient in the aspects of vehicle safety, comfort, reliability and driving performance. The objectives of this paper are to collect the oil samples from AT systems of engine bus according to manufacturer's recommendations and analyse collected oil samples using oil analysis technique. The sample transmission fluid which was taken from the AT gearbox has been experimentally analyzed. The oil samples were taken with an interval of 5,000km, 30,000km, 50,000km, 80,000km, 180,000km and 300,000km for AT bus operation. These samples then have been analyzed by comparing between new and used transmission fluid using Fourier Transform Infrared (FTIR) spectroscopy. Oil analysis by FTIR is a form of Predictive Maintenance (PdM) to avoid major failure in machine elements. Most machine elements are not easily accessible in the transmission system. Having a reliable technique would avoid the needs to open the components unnecessarily, hence, help to prevent catastrophic failure which are very costly, and ease of regular monitoring. In order to identify the major failures of automatic gearbox, forecasts can be made regarding the lube transmission fluid analysis test. By using this test, the minor problems can be determined before they become major failures. At the end of this research, the wear particles profile for interval mileage of AT system was obtained. Keywords: Wear, Automatic Transmission (AT), Transmission fluid, Fourier Transform Infrared (FTIR), Oil analysis.

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