Materials in Practice Tensile Test
Experiment 1: Mechanical Properties Part A: Tensile Strength
DCHE/FT/1A/01 Group A Loh Jia Jun (1316717) 26 April 2013
MATERIALS IN PRACTICE (CP4088)
(a) Synopsis
The main objective of tensile testing is to determine the tensile strengths and tensile modulus of different materials. Specimens that would be used are General Purpose Polystyrene (GPPS), High Impact Polystyrene (HIPS), High Density Polyethylene (HDPE) and Polypropylene (PP).
The thickness of each specimen must be measured and recorded before being placed on the tensile testing machine. Once a specimen is placed on the tensile testing machine, start the machine. When the specimen is stretched and broken, the computer will record down the necessary measurements.
By conducting this experiment, measurements can be found in terms of the breaking load, maximum load, tensile strength, tensile modulus and yield strength. Through this experiment, I found out that GPPS has the highest tensile strength while HDPE has the lowest tensile strength. This shows that out of all four specimens, GPPS is the hardest and toughest material while HDPE is the most ductile.
(b) Introduction
The reason that tensile tests are performed is to use the results obtained and apply it in selection of suitable materials for engineering applications. With the results, we can predict how the material is going to react under certain forms of loading.
This information is essential for engineers as they have to decide on what type of materials to use under different circumstances by comparing different materials. Tensile tests are also able to measure
DCHE/FT/1A/01 Group A Loh Jia Jun (1316717) 26 April 2013
MATERIALS IN PRACTICE (CP4088)
(a) Synopsis
The main objective of tensile testing is to determine the tensile strengths and tensile modulus of different materials. Specimens that would be used are General Purpose Polystyrene (GPPS), High Impact Polystyrene (HIPS), High Density Polyethylene (HDPE) and Polypropylene (PP).
The thickness of each specimen must be measured and recorded before being placed on the tensile testing machine. Once a specimen is placed on the tensile testing machine, start the machine. When the specimen is stretched and broken, the computer will record down the necessary measurements.
By conducting this experiment, measurements can be found in terms of the breaking load, maximum load, tensile strength, tensile modulus and yield strength. Through this experiment, I found out that GPPS has the highest tensile strength while HDPE has the lowest tensile strength. This shows that out of all four specimens, GPPS is the hardest and toughest material while HDPE is the most ductile.
(b) Introduction
The reason that tensile tests are performed is to use the results obtained and apply it in selection of suitable materials for engineering applications. With the results, we can predict how the material is going to react under certain forms of loading.
This information is essential for engineers as they have to decide on what type of materials to use under different circumstances by comparing different materials. Tensile tests are also able to measure
References: (i) J. R. Davis, E-book on Tensile Testing (2nd Edition), 2004 edition (ii) Vasileios Koutsos, Tensile Testing of Polymers, Centre for Materials Science and Engineering, The University Of Edinburgh http://www.cmse.ed.ac.uk/MSE2/Tensile%20testing%20of%20polymers_lab.pdf (iii) Jeannie Chew, Materials in Practice – Tensile Strength Test (2009) http:/www.writework.com/essay/materials-practice-tensile-strength-test (iv) http://www.eduresourcecollection.com/civil_sm_Elasticity.php (v) Ho Thiam Aik, Materials in Practice (2010) School of Chemical and Life Sciences, Singapore Polytechnic