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Elasticity Lab Report

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Engineering

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Objective:

There were two objectives for this study. The first objective was to verify the theoretical

expressions for deflection, through conduction a lab measurement. The second objective was of

the lab was to conduct repeated-unload cycles in the elastic regime to demonstrate elastic

behavior of materials.

Introduction:

Laboratory experiments is a sure way of verifying most of the theories held in the contemporary

world. Unlike with the theoretical research, in lab experiments, the researcher gets an

opportunity to get firsthand information on the matter of interest. There are a number of theories

explaining what happens to materials (elasticity) when they are subjected to some force. The best

was of verifying such theories is through conducting a laboratory experiment to examine the

behavior of the objects when subjected to forces of varying intensity.

Theoretical Background:

In theory, it is known that when beams are subjected to some level of transverse force, create

some internal force such as shear force and bending moment at the interior locations of the beam.

Due to this effect, beams with limited strength deforms. The process through which the

deformation of the beam occurs is known as elasticity curve. When the beam is stretched to a

level where it cannot recover its original state, plastic or permanent deformation is said to have

occurred.

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Modulus of Elasticity:

The modulus of elasticity represents the object’s ability to resist the deformation causing force

subjected to it. Typically, the modulus of elasticity is represented as the slope of a graph when

the values are plotted. Using the values obtained from the lab, the modulus of elasticity for the

two setups can be determined as below.

Choosing the first and last point of the values obtained from the lab as our reference points in the

first loading phase, we have;

Dial gauge 1 (0,23.93) and (100,3.6)

Slope = change in y-value / change in x-value

= (3.6 -23.93)/(100-0)

= -0.2033 (the negative value shows the slope direction; downwards)

Dial gauge 2 = ((0,0.05) and (100,10.56)

Slope = (10.56 – 0.05)/(100-0)

= 0.1051

Yield Strength:

The yield strength is the amount of stress that is required to make a material start exhibiting

plastic deformation. Beyond this point, the material will not be able to recover its original state.

From the graph, this point can be observed from the nature of curve.

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Objective: There were two objectives for this study. The first objective was to verify the theoretical expressions for deflection, through conduction a lab measurement. The second objective was of the lab was to conduct repeated-unload cycles in the elastic regime to demonstrate elastic behavior of materials. Introduction: Laboratory experiments is a sure way of verifying most of the theories held in the contemporary world. Unlike with the theoretical research, in lab experiments, the researcher gets an opportunity to get firsthand information on the matter of interest. There are a number of theories explaining what happens to materials (elasticity) when they are subjected to some force. The best was of verifying such theories is through conducting a laboratory experiment to examine the behavior of the objects when subjected to forces of varying intensity. Theoretical Background: In theory, it is known that when beams are subjected to some level of transverse force, create some internal force such as shear force and bending moment at the interior locations of the beam. Due to this effect, beams with limited strength deforms. The process through which the deformation of the beam occurs is known as elasticity curve. When the beam is stretched to a level where it cannot recover its original state, plastic or permanent deformation is said to have occurred. Modulus of Elasticity: The modulus of elasticity represents the object’s ability to resist the deformation causing force ...
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Tags: Engineering Lab Report Mechanics of Materials lab report Bending test