Pdf design and analysis of drive shaft of an automobile. A steel shaft should not run in a steel bore, but it can run in a bronze lined bore e. A typical failure analysis might include fractography, metallographic and chemical analysis. Understand principles of splines and analyze appropriate loads. The principal problem with hydrodynamic bearings, however, is that the thickness of the. Jun 05, 2008 if you save to pdf before the view has rebuilt in full it will display as a bitmap image in the pdf, or not at all. Aug 08, 2011 ive attched the dwg that contains the pdf underlay as well as the pdf itself. Numerical problems on shaft design 1 a shaft is supported by two bearings which are placed 1m apart.
Basic shapes this part will discuss the various shapes that can be created in part design using the icons on. A wellorganized aftersale service providing problem solving in. Criteria for shaft design are described and methods of design developed. The tubular design makes the drive shaft strong and light. Shaft design material selection geometric layout stress and strength static strength fatigue strength deflection and rigidity bending deflection torsional deflection. Root failure cause is determined using knowledge of the mode, the cause and the particular process or system. A key is a piece of mild steel inserted between the shaft and hub or boss of the pulley to connect these together in order to prevent relative motion between them.
This edition updates critical aspects of the manual to reflect. Newer pdfs arent a problem so im guessing the version is the cause of all the trouble. Try hitting the rebuild for all views, opening the parts and assemblies it refers to and then rebuilding them, then return to the drawing and rebuild again, and then save. Many designers of all disciplines, some of them renowned names, keep in their speech the statement design is problem solving with the good intention of giving design a supposedly lost image of functionality and rigor i understand the use of is problem solving as a metaphor, as an attempt to distance design from the ornamental and whimsical.
Explain the issue causing the need for the modifications and describe how the new design solution will solve the problem refer to design modifications chart. Shaft is a common machine element which is used to transmit rotary motion or torque. A product that creates frustration when used, makes a problem visible, it may or may not be well defined, but sometimes what the designer has to look for are opportunities from still unexpressed needs. Keep a record of all expenses and be sure they are documented. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Canan ozgen dean, graduate school of natural and applied sciences. Design problem assignments motivation engineers often develop new designs and work on solving open ended problems, where there is no single unique solution and no textbook answer. My partner i feel didnt accomplish his work in a timely manner, note the part was hard but it took him over a month and he. A 600mm diameter pulley is mounted at a distance of 300mm to the right of left hand bearing and this drives a pulley directly below it with the help of belt having maximum tension of 2250 n. Standard shaft elements such as shoulders and keys have standard proportions, making it possible to estimate stress. West point bridge designer is a simplified and scaled down computeraided design tool developed by colonel stephen ressler, department of civil and mechanical engineering, u. The problem of identifying design with problem solving.
International journal of engineering research and general. Design based on rigidity is to ensure that maximum deflection because of bending and maximum twist due to torsion of the shaft is within the allowable limits. Dnvglcg0038 calculation of shafts in marine applications. Useful solutions to standard problems in introduction and synopsis modelling is a key part of design. Furthermore, the location of the pure rolling lines has been derived without the zero net friction force assumption, which should allow the reader to better predict the bearing kinematics and hence ball cage pocket clearance and better calculate the friction moments. Keys aroused as temporary fastenings and are subjected to considerable crushing and shearing stresses. Define the required angular speed and transmission power specifications. Md15 keys and couplings university of northern iowa. In the early stage, approximate modelling establishes whether the concept will work at all, and identifies the combination of material properties which maximize performance. The software is also equipped with enormous number of features, a few of which are mentioned below. Reducing stress concentration at shoulder fillet bearings often require relatively sharp fillet radius at shoulder if such a shoulder is the location of the critical stress, some. The pdf in the drawing seems to slow down just about everything i do, especially panning and zooming.
If you change your final design solution, simply document the modifications. Shafts are supported on the bearings and transmit torque with the help of gears, belts and pulleys etc. The shaft is supported on bearings and it rotates a set of gears or pulleys for the purpose. Nowadays, the design and analysis both are carried out by softwares with the help of advanced engineering. Keys and keyways are one of the most common shafthub connections. Determining the root failure cause require complete information about the equipments design, operation, maintenance, history and environment. In this section, you have some tools which allow you to format your ebook. Select its configuration, in other words, choose the elements that will be mounted on the shaft for the desired power transmission and choose the attachment system for each of these elements to the shaft.
Shafts are generally subjected to bending moment, torsion and axial force or a. Multiorigin fatigue crack initiation occurred on one side of the shaft. Shaft stresses similar approach can be taken with any of the fatigue failure criteria equations are referred to by referencing both the distortion energy method of combining stresses and the fatigue failure locus name. Balance the number and timing of openended design problems. Parallel and right angle shaft gear reducers catalog h02. Spur gear design as an exercise in gear selection, a stepbystep procedure will be demonstrated on how to design a gearset pinion and gear for a gearbox that is to be mass produced for a general industrial application. Calculate the bending moment due to the acting forces. Grindstone dressing proper shaft machining methods how to minimize shaft wear. In analysis situation, can either use these customized equations for factor of safety, or can use standard approach from ch. This cuts the length of each shaft to avoid drive line vibration. Local yield will normally not be a decisive criterion for marine shafts. Design stresses in shafts august 15, 2007 23 find the torsion in the shaft. Stress concentrations in keyways and optimization of keyway design. This article deals with the study of crane hook consists various cross sections as well as the modification of standard hook in which the weight optimization is done by changing cross section 1 and stress analysis is studied in ansys 12.
Basic part design this section will cover the basic use of the part design workbench to create parts. You can ensure this by selecting from the drop down menu on the right of the interface in the design tab. Ive attched the dwg that contains the pdf underlay as well as the pdf itself. This first fundamental boundary value problem is solved using schwarz alternating method. If the pdf is created by scanning a page or an image then that wont work because the pdf will be image based rather than vector based. If the pdf is created from a scan or an image then about the best you can do is to save the page as an image and import it into softplan to use as a guide for redrawing the plan. The first american academic journal to examine design history, theory, and criticism, design issues provokes inquiry into the cultural and intellectual issues surrounding design.
Determine the value of the critical speed of rotation for the shaft. If possible, take photographs of the damage and keep them for your files. A methodology for lining design of circular mine shafts in different rock masses submitted by erdooan guler in partial fulfillment of the requirements for the degree of master of science in mining engineering department, middle east technical university by, prof. If the pdf is created from a scan or an image then about the best you can do is to save the page as an image and import it into. Can design key to be weakest link to fail in case of overload shigleys mechanical engineering design. Pdf design problems of anchoring of aboveground steel tanks.
Chapter 11 drive lines, differentials, drive axles, and. When i open my new pdf, either some or all of the drawing views are not showing, some or all of the dimensions and notes are not showing, but the drawing format footer with company name, file. Calculate the torque on the shaft from power step 2. Designs, dimensions, mounting positions and oil quantities right angle shafts. From several years of experience using openended design problems, two per semester is a good balance. Apr 10, 2015 in design it is usual to run into noncompletely defined problems, even some that are not articulated yet. Brainstorming ideas decision matrix final design solution design modifications final design idws reflection well i accomplished my objectives pretty good. Openended design problems university of washington. The criterion for this load case shall not be perceived as a design requirement versus static fracture or permanent distortion. Insidepenton com electronic design adobe pdf logo tiny, download this article in. Download limit exceeded you have exceeded your daily download allowance. The district of columbia department of transportation ddot design and engineering manual has not been updated since 2009.
Shaft is supported in selfaligning ball bearings and gears are both 10 pitch, 40 tooth, 20 spur gears. Regular features include theoretical and critical articles by professional and. Design based on strength is to ensure that stress at any location of the shaft does not exceed the material yield stress. Convert pdf to ebook in 4 easy steps using 3d issue. A simply supported steel shaft is connected to an electric motor with a flexible coupling. Drawing views not showing when converted to pdf solidworks. You may assume that there are no axial loads and that the material selected will be steel with the following properties. Example report failure analysis of gearbox shafts page 7 of 11 figure 5. This file type includes high resolution graphics and schematics. Rigid couplingsrigid couplings a coupling is a device used to connect the end of one shaft to the end of a second. Shaft shown drives a gear set that is transmitting 5 hp at 1750 rpm.
Understand basic types of universal joints and how and when theymay be. It generally has circular crosssection and can be solid or hollow. Your team will design and create a bridge utilizing west point bridge designer software. Estimating stress concentrations stress analysis for shafts is highly dependent on stress concentrations. Cant open exported 3d pdf with save as pdf 3d adobe reader doesnt react when you open the pdf. Couplings and keys objectives recognize different types of keys and their standard sizes. The drive shaft, also called a propeller shaft, is commonly a hollow steel tube with yokes welded on the end.
Clarkson university design problem assignments motivation. Proceed with the next phase of the design, in which a suitable material is selected, and appropriate diameters for each section of the shaft are estimated, based on providing sufficient fatigue and static stress capacity for infinite life of the shaft, with minimum safety factors of 1. Stress concentrations depend on size specifications, which are not known the first time through a design process. If similar materials must be used, such as often the case in construction e quipment where a steel pin runs inside a steel bore, one of the elements should be harder than the other. Calculate the loads coming from gears, belts or chains step 4. Newer pdf s arent a problem so im guessing the version is the cause of all the trouble. Rigid couplings do not allow any misalignment of connecting members. Bruce brown, richard buchanan, carl disalvo, dennis p. No you will need to specify the pdf files for the offline version which you will be prompted to do when you select offline on the output tab. A question or matter involving doubt, uncertainty, or difficulty. Since a broad range of expertise and perspectives is required to create the most innovative and effective designs, engineers often work in teams.
The gearset shall transmit 100 horsepower at a pinion speed of revolutions per minute. This edition updates critical aspects of the manual to reflect advances in industry guidance, provides information on topics that were not previously covered. It is always inserted parallel to the axis of the shaft. The coefficient of variation is defined as cv deviationmean.