Lab Report Example | Topics and Well Written Essays - 1250 words

Lab Report ExampleYoungs Modulus is the measure of the materials stiffness. The Youngs Modulus indicates the extent to which a material stretches as a result of stress. Mathematically, the Youngs Modulus can be expressed asIn ii graphical records downstairs shows the investigateal results of values of stress plotted against strain (stress-strain graph) for steel and aluminium. From the two graphs, the Youngs modulus for the two materials Steel and aluminium were determined.Hooks law of elastic states that Load or Force is forthwith proportional to the extension of the material so long as the given load does not surpass an elastic limit. This relationship is often expressed as the word done or Elastic electric potential Energy required to stretch a material and it is equal to the area of the Tension/extension graph and can be expressed asWe therefore, used the above principle to find the area downstairs the curve. This way, the area is the cross section area of the steel which is 10.12 mm2 (12.49 mm X 0.81 mm). Equally, the modulus of elasticity of steel was institute from the stress-strain graph asThe results of this experiment shows that steel has a higher Modulus of Elasticity compared to Aluminium. Based on the results of this experiment the Modulus of Elasticity of Steel is , which is higher to the Aluminiums Modulus of Elasticity 70.8KN/mm2. This are in conformity with what has been gear up in belles-lettres. Studies show that for steel, the Modulus of Elasticity is 180 x 109N/m2 which is equivalent to 180 KN/mm2 (Krueger, 2007). On the other hand, literature gives the value for Modulus for Elasticity for Aluminium as 69x 109N/m2, which is an equivalent of 69Nmm2 (Krueger, 2007). This clearly demonstrates that modulus of elasticity for Steel is higher than that for Aluminium. However, what is appal is that the experimental Modulus of Elasticity values (both steel was and aluminium) are slightly higher than what has been documented. To ascertain the accuracy of