KholiaHW1

pdf

School

University of Texas, Dallas *

*We aren’t endorsed by this school

Course

6303

Subject

Mechanical Engineering

Date

Dec 6, 2023

Type

pdf

Pages

Uploaded by axk168131

Abdul Samad kholia – axk168131 Problem 2: 1. AECOM is an infrastructure consulting company headquartered in Dallas, TX. Their services include architectural engineering and building design. The CAD software used by the company include Autodesk’s AutoCAD and Revit. Sources: https://aecom.com/about-us/ https://en.wikipedia.org/wiki/AECOM 2. Raytheon Technologies in McKinney, Tx hires mechanical engineers to work on CAD software that includes PTC Creo. Their products and services include space technologies and defense systems. Sources: https://careers.rtx.com/global/en/job/01644282/Principal-Optomechanical-Design-Engineer 3. Lockheed Martin is an aerospace and defense company that has offices in Forth Worth, TX. Their Aeronautics unit uses CATIA V5 for CAD modelling in design Engineer roles. Some of their products include Missile and Fire Control, and Space Systems. Sources: https://www.lockheedmartinjobs.com/job/fort-worth/design-engineer-level- 2/694/54027322688 4. GoEngineer is located in Carrollton, TX and their main service includes 3D Printing. The company uses SolidWorks for Additive Manufacturing and providing design solutions for their customers. Sources: https://www.goengineer.com/3d-printing-services 5. Qorvo Inc. in Richardson, TX develops semiconductor devices (CMOS) for satellites among many other space applications. Mechanical Engineers at Qorvo use CAD packages like SolidWorks and AutoCAD. Sources: https://careers.qorvo.com/job/Mechanical-Engineering-Intern-TX/1071802200/ https://www.qorvo.com/products Summary Table on next page.

Abdul Samad kholia – axk168131 Summary Table: # Name of Company Product Software used References 1 AECOM Building Design AutoCad, Revit https://aecom.com/about-us/ 2 Raytheon Technologies Space Technologies PTC Creo https://careers.rtx.com/global/en/job/01644282/Principal Design-Engineer 3 Lockheed Martin Missile and Fire Control Catia V5 https://www.lockheedmartinjobs.com/job/fort-worth/des 2/694/54027322688 4 GoEngineer 3D Printing SolidWorks https://www.goengineer.com/3d-printing-services 5 Qorvo Inc. CMOS Devices SolidWorks, AutoCad https://www.qorvo.com/products

Abdul Samad kholia – axk168131 Problem 3: a) This sketch is not fully defined. It has 37 DOF and some constraints already applied. To fully constraint the sketch, we have to provide 13 dimensions . This was verified using CAD software as well. Explanation: 37 total DOF coincident: 8 * 2 DOF = 16 horizontal: 4 * 1 DOF = 4 tangent: 4 * 1 DOF = 4 37 - (16+4+4) = 13 dimensions needed. b) The total number of Degrees of freedom of the sketch without any dimensions or constraints imposed are 37. Explanation: 2 arcs: 2 * 5 DOF = 10 1 circle: 1 * 3 DOF = 3 6 straight lines: 6 *4 DOF = 24 Total DOF = 10 + 3 + 24 = 37 DOF .

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

Abdul Samad kholia – axk168131 Problem 4: a) Design for Assembly (DFA): Better designed products tend to have lesser number of parts and are easier to assemble. This is the design principle behind Design for Assembly. It involves optimizing the problem by designing to minimize the amount of parts or components in the design. As we can see in the figures below, we have much less fasteners, hence better DFA. This helps the whole design be more durable as well. Minimizing number of parts, also helps standardize handling and assembly operations as there are lesser number of assembly operations. This impacts the overall cost of the product as well, which goes down as a result of the number of parts and assembly operations going down. Source: https://www.semanticscholar.org/paper/DESIGN-FOR-ASSEMBLY-%3A-A-CRITICAL- METHODOLOGY-FOR-t-Tatikonda

Abdul Samad kholia – axk168131 b) Concurrent Engineering: This methodology involves simultaneously working on different steps of the design and development stage to reduce time to bring a new product to market, leading to improved productivity and cost savings. A famous example of the use of concurrent engineering is in the development of Boeing 777 aircraft that involved customer feedback during development stages. The principles of concurrent engineering are based on having a multidisciplinary team, effective communication and management support and involvement on customers. Concurrent engineering significantly reduces errors and effectively saves time with respect to any conventional project management approach. Source: https://whatispiping.com/concurrent-engineering/

Abdul Samad kholia – axk168131 c) Fail-safe Design Fail-safe design is a common feature of aircrafts as these systems are supposed to have redundancies and have to work even if some parts have failed. This is why commercial aircrafts are 2 instead of 1 engine. There are factors of safety added to all stages of the design after systems going through extensive fatigue testing. Typically factors of safety range from 1.5 – 5. Fail safe designs tend to employ inexpensive components to prevent damage to expensive, difficult to repair components. Fuses in electrical systems are one example of fail-safe design. Another example is shear pins in a boat propeller that transmit power from the shaft to propeller. These are design to fail before the shaft or propeller are damaged, and are easy to replace. Source: https://www.sciencedirect.com/topics/materials-science/fail-safe-design

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version