Please visit http://www.topengineeringsolutions.com/ for assistance in writing engineering final year projects,
engineerin...
2

Date: Thursday, 20 February 2014
Table of Contents
Table of Contents .....................................................
3
Figure 4: Stress Analysis Results when the Beam is fixed at the Bottom ....................................................
4

Figure 1: Schematic Representation of the Desired Bracket Model
5

Figure 2: An Autodesk Inventor 3D Model of the Beam Complete with the Pin

Figure 3: Top View of the Beam
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b) Stress analysis results for the beam considering a fixed end is shown in figure 4 below:

Figure 4: Stress Analysis ...
7

Figure 5: Stresses in the Beam When the Beam Is Fixed Using Two Screws with
Holes Drilled at the Places Indicated
For t...
8

2
2.1

Task 1 Learning Outcome 3.1
Explain the key features of a computer-aided design system.
In this section, the key...
9

Figure 7: Bolts in the Content Centre Showing Different Standards


Parts and material storage and retrieval

Compared...
10



Engineering calculations

Autodesk inventor can only execute a limited number of engineering calculations. It can
b...
11

3.1

Evaluate software that can assist the design process.
In this section, the capability of Autodesk Inventor was ev...
12

Figure 8: Rapid Prototyping using Autodesk Inventor
However, Inventor does not allow for direct CAM application. For C...
13

design, harness and cable design, rules-based design, direct manipulation, tube and pipe design,
sketching tools, tool...
14

4

References

Autodesk.com. (2014). Autodesk Inventor-3D CAD Software. [Online] Available at:
http://www.autodesk.com...
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Unit 8 engineering design,assignment 2 – use of computer based technology in engineering design

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The aim of this assignment was to determine the student's understanding of how computer based technology is used in the engineering design process. Please visit http://www.topengineeringsolutions.com/ to obtain a high quality paper for this assignment

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Unit 8 engineering design,assignment 2 – use of computer based technology in engineering design

  1. 1. Please visit http://www.topengineeringsolutions.com/ for assistance in writing engineering final year projects, engineering lab reports, engineering assignments and all engineering coursework. You can also visit http://www.topengineeringsolutions.com/ for assistance in selecting best engineering final year projects Visit http://www.topengineeringsolutions.com/ to obtain a similar report written from scratch. Title: Use of Computer based Technology in Engineering Design Written by:
  2. 2. 2 Date: Thursday, 20 February 2014 Table of Contents Table of Contents .......................................................................................................................................... 2 List of Figures ................................................................................................................................................ 2 1 Task 1 Learning Outcome 3.2 ................................................................................................................ 3 1.1 2 Task 1 Learning Outcome 3.1 ................................................................................................................ 8 2.1 3 Explain the key features of a computer-aided design system. ...................................................... 8 Task 3 Learning Outcome 3.3 .............................................................................................................. 10 3.1 4 Use Computer-Aided Design Software to Produce a Design Drawing or Scheme....................... 3 Evaluate software that can assist the design process. ................................................................. 11 References .......................................................................................................................................... 14 List of Figures Figure 1: Schematic Representation of the Desired Bracket Model ............................................................. 4 Figure 2: An Autodesk Inventor 3D Model of the Beam Complete with the Pin ......................................... 5 Figure 3: Top View of the Beam .................................................................................................................. 5
  3. 3. 3 Figure 4: Stress Analysis Results when the Beam is fixed at the Bottom .................................................... 6 Figure 5: Stresses in the Beam When the Beam Is Fixed Using Two Screws with Holes Drilled at the Places Indicated ............................................................................................................................................ 7 Figure 6: Different Templates in Autodesk Inventor (Metric and Imperial) ................................................ 8 Figure 7: Bolts in the Content Centre Showing Different Standards ............................................................ 9 Figure 8: Rapid Prototyping using Autodesk Inventor ............................................................................... 12 1 1.1 Task 1 Learning Outcome 3.2 Use Computer-Aided Design Software to Produce a Design Drawing or Scheme a) The model of a bracket shown in figure 1 below was created using Autodesk Inventor and it is shown in figure 2 and 3 below.
  4. 4. 4 Figure 1: Schematic Representation of the Desired Bracket Model
  5. 5. 5 Figure 2: An Autodesk Inventor 3D Model of the Beam Complete with the Pin Figure 3: Top View of the Beam
  6. 6. 6 b) Stress analysis results for the beam considering a fixed end is shown in figure 4 below: Figure 4: Stress Analysis Results when the Beam is fixed at the Bottom When the beam is fixed at the bottom, the maximum stresses are experienced at along the vertical section of the beam. The maximum stress value observed was 6.02Mpa. This is less than the yield strength of aluminium 2014 alloy which is 96.51Mpa. However, the results indicated that the stresses at the point of load application (at the pin) were as high as 9.91Mpa. When the beam is fixed using two screws with holes drilled at the places indicated, the resulting stresses are shown in figure 5 below:
  7. 7. 7 Figure 5: Stresses in the Beam When the Beam Is Fixed Using Two Screws with Holes Drilled at the Places Indicated For this case, the maximum stresses in the vertical section of the beam are 5.5Mpa, while the stresses at the point of load application are 13.7Mpa. This stresses are very low compared to the yield strength (96.51). Nevertheless, the stresses in the screws are extremely high, that is, 645.7Mpa. Therefore, the screws can easily fail hence the entire beam will break from the support. It is important to note that the screws used in this case had a diameter of 1.25 inches. The probability of failure of these screws will depend on their diameter as well as the material. However, increasing the diameter of the screws will require bigger holes to be drilled in the beam which will weaken the beam. If screws must be used to fix the beam, then at least 3 pairs should be used; one pair near the top of the vertical section of the beam, another one at the middle while the last pair should be used towards the bottom of the beam. However, fixing the end of the beam is sufficient for this application.
  8. 8. 8 2 2.1 Task 1 Learning Outcome 3.1 Explain the key features of a computer-aided design system. In this section, the key features of Autodesk Inventor are discussed.  Accessing standards Autodesk Inventor is rigid when it comes to accessing standards, particular standards involving units and dimensions. For instance, if the user intends to use imperial units (inches) in the model, the user must select the imperial template when starting a new drawing a shown in figure 6 below: It is important to note that the user cannot change the units while modelling. Figure 6: Different Templates in Autodesk Inventor (Metric and Imperial) However, the software is a bit flexible when accessing standards associated with standard components such as bolts, bearings and gears. For this case, the user selects the component from the content library depending on the desired standards as shown in figure 7 below:
  9. 9. 9 Figure 7: Bolts in the Content Centre Showing Different Standards  Parts and material storage and retrieval Compared to other 3D modelling software packages, Autodesk Inventor is rigid when it comes to storing and retrieving files. For instance, it lacks the provision for searching inventor files by typing the exact name of the file. The user is always required to save files in the active directory to reduce time wasted in searching the files. This is very important particularly when making assembly drawings because all parts from the content library will be stored in the active directory. Therefore, failure to work in the active directory means that components of the assembly will be in different folders. However, the active folder cannot be changed while inventor files are open.
  10. 10. 10  Engineering calculations Autodesk inventor can only execute a limited number of engineering calculations. It can be used to carry out stress analysis, dynamic simulation of assemblies, frame analysis and design optimisation. However, it has no module to execute computational fluid dynamics or heat transfer analysis. However, models designed in inventor can be exported to other software packages which are dedicated to engineering analysis such as ANSYS.  Integrated circuit design Autodesk Inventor has no module designed for integrated circuit design. However, Inventor IDF Modeller can aid the design of integrated circuit design this software. It uses the IDF standard to create PCB assemblies. Intermediate Data Format (IDF) allows for exchange of printed circuit assembly data between mechanical design and printed circuit board (PCB) layout.  Circuit and logic simulation-including AC, DC and transient analysis Autodesk Inventor has no module designed for circuit and logic simulation-including AC, DC and transient analysis.  Schematic capture Autodesk inventor lacks the schematic capture capability and is also not meant for 2D modelling. Nevertheless, 2D electrical designs and schematic capture can be carried out using AutoCAD electrical then exported to Inventor. Since there is smooth interoperability between AutoCAD Electrical and Inventor, AutoCAD Electrical and Inventor can be used to digitally prototype and document electrical designs. 3 Task 3 Learning Outcome 3.3
  11. 11. 11 3.1 Evaluate software that can assist the design process. In this section, the capability of Autodesk Inventor was evaluated on the basis of costs, compatibility with other software packages and technology used such as CNC machining and 3D printing (rapid prototyping), functional as well as technical capability of the software when used in product design process.  Costs associated with Autodesk Inventor There are two main versions of Inventor namely; inventor and inventor professional. According to Autodesk.com (2014), Autodesk Inventor Professional 2014 costs $7,295. On the other hand, Autodesk Inventor 2014 costs $4,725 (NOVEDGE, 2014). However, Autodesk offers institutions and schools affordable pricing for Autodesk Inventor Educational version. The price can be as low as 30% less than the commercial version (USA.Autodesk.com, 2014).  Compatibility with other software and technology used. E.g. CNC machining and rapid prototyping Autodesk Inventor has the capability to carry out rapid prototyping. The model to be printed is usually saved as an STL (*.stl) file which is compatible with most commercially available 3D printers. The ‘send to 3D print service’ guides the user through the workflow. The user controls the resolution and scale of the printout. This service is accessed as shown in figure 8 below:
  12. 12. 12 Figure 8: Rapid Prototyping using Autodesk Inventor However, Inventor does not allow for direct CAM application. For CNC manufacturing, Autodesk Inventor files are imported into CAM dedicated software packages such as MasterCAM and InventorCAM. Autodesk Inventor models can also be saved into a universal data exchange format such as IGES or STEP to allow for compatibility with other CAD software packages.  Functional as well as technical capability of the software when used in product design process. Autodesk Inventor is CAD Software for simulation and mechanical design and has the following capabilities: BIM compatibility, CAD file conversion and data exchange, AutoCAD integration and DWG compatibility, Manufacturing and design documentation, CAD rendering and visualization tools, data management, assembly design, sheet metal design, plastic part
  13. 13. 13 design, harness and cable design, rules-based design, direct manipulation, tube and pipe design, sketching tools, tooling and model design, design optimisation and finite element analysis.
  14. 14. 14 4 References Autodesk.com. (2014). Autodesk Inventor-3D CAD Software. [Online] Available at: http://www.autodesk.com/products/autodesk-inventor-family/overview [Accessed: 11 Jan 2014]. NOVEDGE. (2014). Inventor 2014- DVD version. [Online] Available at: http://www.novedge.com/products/5095 [Accessed: 11 Jan 2014]. USA.Autodesk.com. (2014). Autodesk - Educators - How to Buy. [online] Available at: http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=10916786 [Accessed: 11 Jan 2014].

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