Lab Reports and Workshop Reports

Lab 8: Tensile Testing 1. Introduction             The mechanical properties of materials are determined by performing carefully designed laboratory experiments that replicate as nearly as possible the service conditions. In real life, there are many factors involved in the nature in which loads are applied on a material. The following are some common examples of modes in which loads might be applied: tensile, compressive, and shear. These properties are important in materials selections for mechanical design. Other factors that often complicate the design process include temperature and time factors. The topic of this lab is confined to the tensile property of polymers. Figure 1 shows a tensile testing machine similar to the one used in this lab. This test is a destructive method, in which a specimen of a standard shape and dimensions (prepared according to ASTM D 638 : standard test method for tensile properties of plast...

Title Tensile Testing of Metals Objective ·          To determine the tensile strength of metal Introduction Tensile testing is an important test for getting information about materials and their properties. Some of the properties are ultimate tensile strength, maximum elongation, yield strength, Young’s modulus and Poisson’s Ratio. The results can be used when choosing suitable materials for production and construction. The test is done by applying an increasing axial force to a standard tensile specimen until failure. The specimen has two large ‘shoulders’ for gripping and a thinner middle section for deformation and fracture. The dimensions differ in various standardised tests. During the test the tensile force and the extension are recorded. The information is used to calculate the stress and strain. First the sample would undergo elastic deformation until the yield point. After that the plastic deformation takes place until failu...

Title Tensile Testing of Metals Objective ·          To determine the tensile strength of metal Introduction Tensile testing is an important test for getting information about materials and their properties. Some of the properties are ultimate tensile strength, maximum elongation, yield strength, Young’s modulus and Poisson’s Ratio. The results can be used when choosing suitable materials for production and construction. The test is done by applying an increasing axial force to a standard tensile specimen until failure. The specimen has two large ‘shoulders’ for gripping and a thinner middle section for deformation and fracture. The dimensions differ in various standardised tests. During the test the tensile force and the extension are recorded. The information is used to calculate the stress and strain. First the sample would undergo elastic deformation until the yield point. After that the plastic deformation takes place until failu...