Photos and Videos

Photos and Videos of taken throughout the three days of the camp can be downloaded respectively as from the links below:

• Photos: http://www.keepandshare.com/doc/2864549/photos-zip-june-11-2011-10-37-pm-7-5-meg?da=y
  
• Videos: http://www.keepandshare.com/doc/2864548/videos-zip-june-11-2011-10-37-pm-3-1-meg?da=y
  

(II) Our Mission ~ Part 2(v)

Q5: Questions from Project Manual (For group members: Please login to sstmail to see the manual and hence answer questions).

(II) Our Mission ~ Part 2(iv)

Q4: Questions from Project Manual (For group members: Please login to sstmail to see the manual and hence answer questions).

(II) Our Mission ~ Part 2(iii)

Q3: Questions from Project Manual (For group members: Please login to sstmail to see the manual and hence answer questions).

(II) Our Mission ~ Part 2(ii)

Q2: Questions from Project Manual (For group members: Please login to sstmail to see the manual and hence answer questions).

(II) Our Mission ~ Part 2(i)

Q1: Essential Questions:
For group members: Click here for the sample.

(II) Our Mission ~ Part 1

(A) Tensile Testing of Engineering Materials

Experimental Procedures

Polymer and Metal Tensile Testing:

1. Measure the cross-sectional are (thickness and width) of specimen by using a caliper
2. Load the specimen to the equipment.
3. Lower the specimen to the bottom clamp slowly and tighten it by the hand
4. Clamp the specimen tightly by the upper clamp
5. Activate the specimen protection
6. Set all the readings to zero
7. Execute the test
8. Get the data, fill in the following table and plot the graph of Stress vs. Strain using Excel
9. Remove the Specimen
10. Finally compare all the three curves in one frame of axes and discuss about the differences.

Questions

1. Why there are variations in the mechanical properties of material of the same type?
2. Why differences exist in mechanical properties of different materials?
3. What is the majority difference between polymer and metals in terms of mechanical behaviour?

Bonus Question: Compare the break surface of the 3 samples, guess the relationship between elasticity and break surface.

(B) Scanning Electron Microscope (SEM)

Experimental Procedures

1. Vent the column and insert specimen
2. Pump down (evacuate)
3. Select accelerating voltage, spot size and working distance
4. Turn on high voltage
5. Select load current (3-5kv for polymers and 15kv for metals and ceramics)
6. Turn up filament (touch the orange bar)
7. Select TV rate
8. Adjust the image and save.

Questions

1. What do you think may be caused if there is too much moisture on the specimen?
2. What is the working distance and accelerate voltage if the specimen is titanium?
3. Why can’t we heat the filament too fast?
   

(C) Composite Material Processing

Experimental Procedures

1. Take 5 pieces of the fiber matt.
2. Weigh the fiber matt and record down the weight of the fiber matt used. In this case we will use 1:1 ratio between fibers and matrix; 5:3 ratio between epoxy and hardener solution.
3. Arrange the plastic sheet, Teflon sheet and tissue paper in the following way.
4. Calculate the weight of epoxy required (62.5% x weight of the fiber matt) and record down in the logsheet.
5. Calculate the weight of hardener solution required (37.5% x weight of the fiber matt) and record down in the logsheet.
6. Pour and weigh the required amount epoxy into the plastic cup.
7. Pour and weigh the required amount hardener solution into the plastic cup.
8. Stir and mix the solution with ice cream stick for 2-3 minutes.
9. Put the first fiber matt on the Teflon sheet.
10. Pour small amount of the solution and spread over the fiber surface.
11. Quickly put the second fiber matt on top of the first fiber matt.
12. Pour some of the solution on and spread over the fiber surface.
13. Repeat step number 11-12 for all the five fiber matt.
14. Quickly cover the fiber matt with Teflon sheet, tissue paper and the plastic sheet as shown in the arrangement in step number 3.
15. Put on some weight and leave it for 1-2 hours.
    

(I) Overview of Project

The theories and concepts behind the topics...

(A) Mechanical Testing on Various Materials.

Introduction

Different types of materials have different microstructures, which determine their properties. Engineers are interested in exploring the properties of these materials so that they can be better used in the correct representation.
There are three broad categories that are commonly used: metals, ceramic and polymers, as well as composite materials. This experiment studies the mechanical properties of the three materials and demonstrate the factors that affect the strength of each of the different materials.

Objective

1. To understand different mechanical properties of materials.
   
2. To observe how the three types if materials behave in their mechanical properties under the tensile test.
3. To understand the major factors which determine those mechanical properties.

(B) Virtual Scanning Electron Microscope (SEM)

Introduction

Electron microscopes were developed due to the limitations of light microscopes which can only have a resolution of 2 micrometer.

The first electron microscope (SEM) appeared in 1942, it uses a beam of energetic electrons to examine objects of a fine scale. The sample examined is swept by the electrons beam across its surface. The signals generated by the interaction of the electron beam with its sample are collected by a variety of detectors. This provides up with the topography, morphology and the composition of the sample

Objective

1) Learn the basics of SEM theory and instruments.

2)

Learn the basics of Signal Detection theory and instrumentation for (SE)(BSE) and (EDX) detectors.

(C) Composite Materials Processing

Introduction

Composite Materials are a mixture of two or more materials. It has the desirable properties which cannot be attained by either material acting alone. Therefore these materials are used in transportation industries especially airplanes and also sports equipment.

Objectives

1) To understand what is composite materials and how to fabricate them.

2) To appreciate the applications of composite materials in daily life

3) To appreciate the mechanical properties of composites

Our Team

Our Members

Here is the list of the students currently who make up our team:

• Weihong (Leader)
• Mayur (Assistant Leader)
• Vivek
• Adam

The Group Photo

Here is the photo of the group, SST teacher-in-charge Mrs Lim Woon Fong, as well as the 'technicians' from NTU. This group photo was as taken on June 7, 2011, during the first project on tensile testing of engineering materials.

7-6-11
The group photo for tensile testing of engineering materials.
(From Left: Mrs Lim, Adam, Mayur, 'Technician' 1, 'Technician' 2, Weihong, Vivek.)

Project Supervisor

Our project supervisor, honourably , for this project is:
Asst Prof Ali Gilles Tchenguise Miserez