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Feb 26, 2016 / Haseeb Jamal -

5 Travel Myths You Need to Stop Believing Right Now

Feb 26, 2016 / Haseeb Jamal -

Canal Comes Alive with Lighted Boat Parade.

Determination of Strain in a Steel Bar

Prepare a test specimen of at least 2ft. Measure at least 3 places dia of steel bar by a VC and calculate the average value. Mark the gauge length i.e 2 marks 8” apart.

True Stress & True Strain | Engineering Stress - Strain

The true stress (ø) uses the instantaneous or actual area of the specimen at any given point, as opposed to the original area used in the engineering values. The true strain (e) is defined as the instantaneous elongation per unit length of the specimen. The relationship between true stress and true strain i.e. the flow curve can be expressed using the power law:

Torsion Test on Mild Steel and Cast Iron - Lab Report

To study the shear stress ~ shear strain behavior of the material. To study the failure pattern of these materials in torsion. To determine the mechanical properties, e.g, Modulus of elasticity, Modulus of rigidity, Shear strength, shear strain and ductility in torsion.

Universal Testing Machine and Components of UTM

A machine used to test specimens for tensile strength, compressive strength, shear strength and to perform bend test along other important laboratory tests. The primary use of the testing machine is to create the stress strain diagram. Once the diagram is generated, a pencil and straight edge or computer algorithm can be used to calculate yield strength,

Tensile Strength or Tension Test

Tensile strength of a material is the tension stress at which a material breaks or permanently deforms (changes shape) Toughness, Resilience, Poisson's ratio can also be found by the use of this testing technique. This data is plotted as load vs elongation and then converted to engineering stress (load/original area) vs engineering strain (fractional change in length over

Strain Hardening | Definition and Effects

In the plastic region, the true stress increases continuously i.e when a metal is strained beyond the yield point, more and more stress is required to produce additional plastic deformation and the metal seems to have become more stronger and more difficult to deform. This implies that the metal is becoming stronger as the strain increases. Hence, it is called "Strain

To Find out the Reaction of Simply Supported Beam

Condition of equilibrium for vertical parallel forces acting on a body is Sum of all the force s should be zero. It should satisfy the principle of moments . If we take moment about a point on moments should be equal to anti clockwise moments.

Residual Stresses - Definition, Properties and Effects

They have more surface exposure per unit volume, the flange tips tend to cool faster than flange-to-web junctures. Tension members response to load is much similar to that of tensile-test coupon . Member behavior may differ from coupon behavior because of: Residual stresses result principally from non-uniform cooling of hot rolled or welded shapes and

Residual Stresses - Definition, Properties and Effects

They have more surface exposure per unit volume, the flange tips tend to cool faster than flange-to-web junctures. Tension members response to load is much similar to that of tensile-test coupon . Member behavior may differ from coupon behavior because of: Residual stresses result principally from non-uniform cooling of hot rolled or welded shapes and

Basics and Principles of Plastic Analysis

Plastic analysis is defined as the analysis in which the criterion for the design of structures is the ultimate load. We can define it as the analysis inelastic material is studied beyond the elastic limit (which can be observed in stress strain diagram). Plastic analysis derives from a simple mode failure in which plastic hinges form. Actually the ultimate load is found from the

Mohr's circle & Principle Stresses

It is a useful graphical technique for finding principal stresses and strains in materials. Mohr’s circle also tells you the principal angles (orientations) of the principal stresses without your having to plug an angle into stress transformation equations.

Mechanics of Solids Lecture Notes

It is the combination of physical, mathematical, and computer laws and techniques to predict the behavior of solid materials that are subjected to mechanical or thermal loadings. It is the branch of mechanics that deals with the behavior of solid matter under external actions. The external actions may be: External Force Temperature Change Displacement

Laboratory Investigation of Hooke’s Law

Prepare the test specimen that is steel bar and find its diameter at tree different places and find its man value. Mark two points 8" a part of 2 ft long steel bar. Insert the bar in jaws for gripping the steel bar and select suitable bar on UTM. Place the steel bar and fix it.

Determination of Deflection in Over Hanging Beams

Take the beam model and place it on the table. it should be kept horizontally and firmly. Determine the length of the beam and also dimension of cross section.

Determination of Bending Moment in Beam

Take a beam model and place it on a table in such away that it should be horizontal and firm. Record the length and cross section. Set the deflection gauge at a point where the deflection is to be measured.

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