Comment on the ductile versus brittle behavior

Assignment Help Other Engineering

Reference no: EM131193351

Materials Assignment-

Aims:

The aim of this practical is to carry out tensile tests on selected metal and polymer samples with a view to understanding stress versus strain behaviour, Hooke's Law, Young's modulus, ultimate stress, yield, ductile and brittle behaviour and structure-property relationships. You will compareyour tensile data with that published in literature.

1. OUTLINE OF YOUR REPORT

1. Aims

2. Introduction

Define:

a) Hooke's Law,

b) Young's Modulus,

c) Ultimate Stress,

d) Yield stress,

e) Breaking stress,

f) Breaking strain,

g) Ductile Material,

h) Brittle Material

Analysis of your results-

a) Extract the Young's modulus from the graphs. Young's modulus for each sample is calculated during the practical by using the straight line fitting within the software.

b) Read Ultimate stress (tensile strength), yield stress, breaking stress, breaking strain and percentage elongation at break (if the sample is broken).

c) For metal samples if there is no clear yield point determine the 0.2% offset yield stress.

d) Tabulate Young's modulus, Ultimate stress (tensile strength), Yield stress , 0.2% offset yield stress, breaking stress, breaking strain, percentage elongation at break for all the samples you tested.

e) Include values for the above from literature for comparison on the same table

f) Comment on the results and possible sources of error.

g) Comment on the ductile versus brittle behavior from your results. Which samples exhibited ductility and which ones failed in a brittle manner?

h) Comment on the strength of materials, compare and contrast them. Compare metals and polymers with respect to their general tensile behaviour. Give reasons for the observed behavior.

INTERPRETATION OF DATA-

You have built the majority of the tension testing machine, but much of the instrumentation is still being assembled. To test the machine, you perform a test on a steel specimen with known properties. The machine provides you with the given load data, and you manually record the lengths between the marks on the specimen at each point using an extensometer to obtain the table of data shown below.

L (mm)	50.03	50.06	50.89	52.03	53.34	54.92	57.12	62.13	64.51	66.91	68.59	69.04
P (kN)	15.61	31.54	35.01	39.28	43.77	48.04	52.36	55.03	52.49	48.09	43.64	41.90

Use these results to plot the stress versus strain curve for the above sample and determine:

1) Why is stress versus strain diagram is preferable to force versus extension diagram?

2) Plot the above data using computer

3) Yield stress

4) Yield strain

5) Ultimate stress (tensile strength)

6) Young's modulus

7) Modulus of resilience

C. Using the information in the following graph of a\the sample with a gauge length of 50 mm and diameter 10 mm.

1) If the sample was strained to a value of 0.0035 and released what would be the elastic recovery?

2) Given that the Poisson's ratio of this material is 0.29, if we applied a stress of 300 MPa, what would be change in its diameter?

3) Using the graph below evaluate the approximate Modulus of Resilience of this material.

Attachment:- MIBT Assignment.rar

Reference no: EM131193351

Questions Cloud

Business performance management system : Employee incentive plans are widely used in organizations to align employee behavior toward the corporate strategy. Some experts argue that employee incentive programs are not effective and may even be detrimental in some instances. Evaluate the effe..

Companies take customer satisfaction to the next level : Give a response to the following statement: When it comes to customer satisfaction companies must thrive on this or simply they will lose their customers. With every market becoming more and more competitive it is important that these companies take ..

Identify and discuss the three phases of a strategic plan : Discuss implementing Marketing Mix and allocated resources into the strategy plan. Provide a comprehensive discussion regarding the importances of creating value for the EWC. Define the concept and the process that is necessary to identifying EWC tar..

Would the eventual freedom of the slaves have been delayed : Consider what might have happened if Georgia and the Carolinas stayed out of the Union because of a desire to protect slavery. What would subsequent American history have been like? Would the eventual freedom of the slaves have been delayed-- or adva..

Comment on the ductile versus brittle behavior : SEM111 Materials Assignment. Comment on the ductile versus brittle behavior from your results. Which samples exhibited ductility and which ones failed in a brittle manner? Comment on the strength of materials, compare and contrast them. Compare me..

Benefits associated with a trust performing such function : A local bank has asked you to speak at its Building Personal Wealth Conference on the topic of: “What Should Your Trust Do for You?” Develop a summary of one function that a trust might be able to accomplish for an individual who has more than a mode..

What is the ratio of the radius of aluminium sphere : A uniform lead sphere and a uniform aluminium sphere have the same mass what is the ratio of the radius of aluminium sphere to the radius of the lead sphere?

Design the graphic organizers around the informational text : Each graphic organizer will support the comprehension strategy being used. Design the graphic organizers around the informational text and strategy.

How do we develop a competitive advantage with our strategy : What is strategy? How do we develop a competitive advantage with our strategy? How do we sustain that competitive advantage across time? In your post make sure to (1) Briefly describe some examples you can think of where companies have been off targe..

User Account

All Pages