Tensile Test Report
Practical Report
Name: Loh Khin Keong
Admin No.: 1237078
Group number: A
Date: 11/5/12
Class: DMLS/1A01
Experiment 1A: Determination of Mechanical Properties of Selected Materials (CDIO)
1. Synopsis
The objective of this CDIO experiment was to determine the mechanical property of polymeric materials which was the tensile properties .The testing standard to adopt for the tensile testing was ASTM D638. Four different types of polymers were placed into the tensile testing machine. The different specimens would then be stretched till it breaks. The tensile testing machine would give the information on the force that was required to stretch the different specimens until it breaks. The average reading of Tensile modulus of all four specimens tested range from 500.00 -1600.0N/mm2. The average reading of Tensile Strength and Yield Strength ranges from 21.000N/mm2 – 37.000N/mm2 and 22.000N/mm2 – 34.000N/mm2 respectively.
2. Introduction
Tensile test is the most common mechanical test to determine several important mechanical properties such as modulus of elasticity, yield strength, ultimate tensile strength, ductility and toughness. Typical tensile applications of tensile testing are usually in packaging, textiles, medical, aerospace industries etc. The Lloyd tensile testing machine is used in this experiment. The tensile machine consist of two clamps, movable and stationary, load cell (a transducer that is used to convert a force into electrical signal) and grip distance (the length between the two clamps that holds the specimen).The specimen will be place into the tensile test machine, and then pulled at a constant rate and has devices to continuously measure and record the applied load and elongation of the specimen. The device will determine the yield strength, tensile strength, tensile modulus, breaking load and maximum load.
3. Theory 1) Molecular arrangement
The polymeric materials that are put to the test are General Purpose Polystyrene (GPPS), High
Name: Loh Khin Keong
Admin No.: 1237078
Group number: A
Date: 11/5/12
Class: DMLS/1A01
Experiment 1A: Determination of Mechanical Properties of Selected Materials (CDIO)
1. Synopsis
The objective of this CDIO experiment was to determine the mechanical property of polymeric materials which was the tensile properties .The testing standard to adopt for the tensile testing was ASTM D638. Four different types of polymers were placed into the tensile testing machine. The different specimens would then be stretched till it breaks. The tensile testing machine would give the information on the force that was required to stretch the different specimens until it breaks. The average reading of Tensile modulus of all four specimens tested range from 500.00 -1600.0N/mm2. The average reading of Tensile Strength and Yield Strength ranges from 21.000N/mm2 – 37.000N/mm2 and 22.000N/mm2 – 34.000N/mm2 respectively.
2. Introduction
Tensile test is the most common mechanical test to determine several important mechanical properties such as modulus of elasticity, yield strength, ultimate tensile strength, ductility and toughness. Typical tensile applications of tensile testing are usually in packaging, textiles, medical, aerospace industries etc. The Lloyd tensile testing machine is used in this experiment. The tensile machine consist of two clamps, movable and stationary, load cell (a transducer that is used to convert a force into electrical signal) and grip distance (the length between the two clamps that holds the specimen).The specimen will be place into the tensile test machine, and then pulled at a constant rate and has devices to continuously measure and record the applied load and elongation of the specimen. The device will determine the yield strength, tensile strength, tensile modulus, breaking load and maximum load.
3. Theory 1) Molecular arrangement
The polymeric materials that are put to the test are General Purpose Polystyrene (GPPS), High
References: 1. Donald C.Hylton. 2004. Understanding Plastics Testing. Ohio. Hanser Gardner,inc. 98p. 2. R.P Brown, Handbook of Plastics Test Methods, 1988 Edition 3. R.P Brown, Handbook of Polymer Testing, 2002 Edition 4. John V.Schmitz & William E.Brown, Testing of Polymers, Volume 3