Lab Report On Stress And Strain Essay

A graph of the hardness of the material versus the percentage cold work was plotted for both specimens. In both cases, it was observed that the percentage of cold work increases proportionately with an increase in the hardness of the

The tensile testing was done on the three composite specimens (90°, and two 45°) were completed with a servo-hydraulic load frame with a wedge. The one in the lab was the MTS 647 hydraulic wedge grip and an 810 material test system. The specimens had strain gages with a Wheatstone bridge to collect data such as time, distance, load, axial strain, and transverse strain. From the strain gages, evidence can support how and when the specimen material failed under the stress being applied to it. The test was run for three times on three different specimens. The first specimen that was tested in the hydraulic load was the 0°/90° specimen, which is made of carbon and epoxy laminate composite.

{ε0} is the in plane strain and {k} is the curvature of the reference surface.

With respect to the diathesis-stress model, discuss two potential stresses (4 points) relevant to the case.

In Figure 4, Young's modulus is plotted against yield strength. The diagonal line in the figure represents the material index M= σy/E. Materials below the diagonal line are the best candidate materials because they will remain elastic while providing the maximum conformability. All materials that cost more than $2.20 per pound and have a UV rating of "poor" were eliminated. Also, only materials that can be made through the polymer extrusion process were considered. The candidate materials are listed in Table 1 and ranked by the material index. The current material, TPV, is included in the table for

Briefly describe the nature of the relationship between these two variables (Hint: mention strength and direction). [2 marks]

Sample 3 achieved a higher Rockwell C rating than its initial "As Received" hardness with every type of quench.. Whereas samples 1, 2, and 4 softened during the annealing process but increased in hardness with the other quenching medias.

Deflections of a beam are important to be able predict the amount of deflection for a given loading situation. This experiment addresses determining the yield point for a material to fail, so the stress in the material does not have to reach to that point. This is where understanding beam deflection becomes a useful tool. This experiment is using beam deflection theory to evaluate and compare observed deflection per load values to theoretical values. Beam deflection experiment done by four parts. Part 1 -Simple Supported Bean, part

This lab will test the relationship between the spring constant, k, from Hooke’s Law and the change in applied force resulting in displacement. Using two different methods, part one and two of the lab will determine the spring constant, k. In part one we will hang different masses from the spring so that we can alter the amount of force acting on it. After applying these weights, one can measure the displacement caused by this action. Hooke’s equation will yield a straight line graph of F (weight) versus x (displacement). The slope of the graph will yield the spring constant, k. In part two we will be using the oscillation of the mass on the spring as an example of SMH. By graphing the oscillation, we can

Engineering involves a wide array of problems that must be overcome. A great deal of time is spent researching materials and their properties. Materials compromise all aspects of our society, from buildings to roads to even the equipment that was used in this lab. Problems arise in regards to how strong or flexible the material is, with the official terms being stress, strain, and elasticity. Improper use of such materials results in tragedies such as the Tacoma Narrows Bridge in Washington that failed to due resonance and stress beyond its elastic limit [1].

Biaxial tensile testing were conducted by means of EnduraTec ELF 3200 (Bose, Minnesota, USA). This mechanical tester has two vertical axes each of which has a 1 kg load-cell (Model 31, Sensotec Honeywell) and a displacement transducer. The apparatus is equipped with a black-and-white CCD-camera video-extensometer (Watec America LCL 902C camera with Computar TEC55 Lens), allowing the automatic tracking of gauge marks, four dots forming a square plotted on the surface of the specimens.

The First method of this study was Experiment. Material were used 8, 52.4 mm diameter

Purpose: The purpose of this Physics Lab is to investigate what factors determine the amount of flexion of the cantilever. Hence, the objective is to establish a relationship between the length of a cantilever, which may give some insight into the physics of cantilevers.

Where P is the applied force, L is the length of beam, E is the modulus of elasticity of aluminum, and I is the moment of Inertia.

That performed laboratory session on bending moments and shear forces requires good understanding and sufficient knowledge of axial forces. Bending is defined as a behavior of any structural element that undergoes the external load, which is applied perpendicularly to longitudinal axis. That experiment helps us to find the maximum load that can be applied to the beam with rectangular cross section. Moments are calculated by using statics theory, or multiplying perpendicularly directed load by the respective distance to the pivot point.