automotive engineering

Faculty of Computing, Engineering and Sciences

Module Name:   Engineered Systems/ Design & Materials
Module Number :       MECH50540
Title of Assignment :   Individual Material Selection Report 12.5% of Module Total
Module Learning Outcomes for This Assignment
1) DEMONSTRATE A SOUND KNOWLEDGE AND UNDERSTANDING OF A RANGE OF ENGINEERING MATERIALS………….   Knowledge & Understand

Hand in deadline : 7/1/15 VIA BLACKBOARD
Assessment Breakdown
Criteria   Mark/
Weight
Q1 expressions and data used, calculation and solution clearly identified.   /10%
Q2 brief explanation of selection methodology, properties chart(s), results table       /10%
Q3 brief explanation of selection methodology, properties chart(s), results table.               /25%
Q4 Collection of appropriate expressions, derivation and final clear statement of MI   /25%
Q5 properties chart with selection line, results table   /10%
Q6- Process selection stages with clear and substantiated constraints and suggested processes   /20%
Overall Mark/%

The following exercises are to allow you to demonstrate your ability to use CES in material selection.
Your submission will be a single Word (.doc file) or PDF with embedded (and labelled) images and tables from CES where necessary. DO NOT use screen grabs.

It will be submitted via Turnitin.

Your filename should be <student number–Materials-Ass1>eg FW002261-Materials-Ass1

Your file MUST include page numbers and your student numberon the cover page and in the footer.

1. A cantilever tube has an unsupported length L = 350.0 mm, an outside diameter of 45mm and an inside diameter of 35mm.
It is made of an aluminum alloy.
By how much will the end deflect under and end-load of 500 N?
Use data from CES for the (mean) value of Young’s modulus of aluminum alloys, the equation for the elastic deflection of a cantilever and for the second moment of a tube.

Submission requires:- expressions and data used, calculation and solution clearly identified.
(10marks)

2. Use a Young’s Modulus-Density (E-?) chartnormalized towrought aluminium alloys WAA to find
(a) anymetals that are both higher modulusand less dense than WAA and
(b) materials (not just metals) that are both highermodulus and less dense than WAA

Submission requires:- brief explanation of selection methodology,normalised properties chart(s), results table (10marks)

3. Use an E-?chart to identify materials with both 50GPa<E < 100 GPa and E 1/2/?> 0.003 (GPa)1/2/(kg/m3).
Remember that, on taking logs, the index M = E 1/2/ ?becomesLog ( E ) = 2Log (?)+ 2Log (M )

Submission requires:- brief explanation of selection methodology, properties chart(s), results table. (25 marks)

4. In strength-limited applications, deflection is acceptable provided the component does not fail; strength is the active constraint.
Derive the material index for selecting materials for a beam of length L, specified strength and minimum weight. For simplicity, assume the beam to have a solid square cross-section t x t. You will need the equation for the failure load of a beam.
Fig Q4
Function    •Beam
Constraints    •Length L is specified
•Beam must support a bending load F without yield
Objective   •Minimize the mass of the beam
Free variables    •Cross-section area, A
•Choice of material

Submission requires:-Collection of appropriate expressions, derivation and final clear statement of MI (25 marks)

5.Show your material index of Q4 on an appropriate properties chart, selecting the 5 materials with the highest MI.