Lysandros Pantelidis Aristotle University of Thessaloniki, Greece DETERMINATION OF SOIL STRENGTH CHARACTERISTICS PERFORMING THE PLATE BEARING TEST Summary: In the international literature there is often confusion between the terms Modulus of Elasticity EYoung and Modulus of Deformation EDef for homogenous, isotropic masses, which, sometimes, plainly referred as Modulus E, without any further explanation. In this paper a distinction between the EYoung and the EDef is being done and the interest
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The axial stiffness can be calculated as follows: K AXIAL AE L Where A = Rivet Cross Sectional Area E = Rivet Modulus of Elasticity L = Rivet Grip Length The shear stiffness of a riveted joint is calculated by the following equation for rivets installed in an aluminium sheet: K SHEAR ED D D A B t D tS Where E = Sheet Modulus of Elasticity D = Rivet Diameter tD = Doubler Thickness tS = Skin Thickness A = 5.0 for aluminium fasteners 1.666 steel fasteners B = 0.8 for
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ksi, kPa, MPa, GPa) * Strain: ε=Change in LengthOriginal Length (%, in/in, mm/mm) * Elastic behavior * Elasticity- instantaneous response (deformation to load) and must return to its original shape when the load is removed. Stretches the bonds between atoms-doesn’t change arrangement of atoms * Young’s Modulus (Modulus of Elasticity)- Slope of the linear portion of the stress-strain curve E=σε * Poisson’s ratio- Ratio of the lateral strain to the axial
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Q1. Explain in detail, the significance of the Pilling-Bedworth ratio as applied to the oxidation of metals. Titanium has a similar Pilling-Bedworth ratio to nickel and yet nickel alloys are chosen in preference to those based on titanium for use in high temperature applications such as gas turbines- why? If designing a jet engine, what other materials selection criteria might be important? Q2. What would happen to the microstructure and properties of a typical Al-Cu alloy, as used for precipitation
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Crisis Case Management Paper PACO 604 Instructor: Professor William Mark Holland Rodney A. Tinsley February 2, 2014 After previewing a 45-minute full episode of a crisis case via a video link, in which I had to observe several family members in crisis. I selected Sean as the family member from the crisis case and I will provide crisis intervention utilizing the models of crisis intervention discussed in the textbooks by Floyd and Wright. Nature of the Crisis The nature of the
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Radius to selected strain gauge Furthermore, equations based on material properties and experimental values may be used to calculate hoop and radial stresses: σθ=E1-v2(εθ+vεr) σr= E1- v2(εr+vεθ) Where: E = Modulus of elasticity v = Poisson’s ratio εθ= Hoop Strain εr= Radial Strain Apparatus * “TQ” SM1011 Thick Cylinder * PC with “VDAS” software The SM1011 consists of an aluminium alloy cylinder where the two halves are firmly
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* What is angle of twist in elastic range * What is Torque * What is shear stress in the elastic range * What is shear strain in the elastic range. * Torsion in circular and noncircular shafts * What is Shear Modulus of Elasticity * What is polar moment of inertia * Stress Concentrations Your lab report should have the following sections: 1. COVER PAGE Cover page should include the objective of the experiment and the following information Your
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Analysis of Tensile Strength of Standard Metal Specimen CE 121 Structural Engineering I Professor. Tzavelis 09/18/2013 Sasha Vera – Theory, Revision of the report Mary M. Mazur – Discussion and Conclusions Jae Ho Jang – Objective, Experiment, Lab assist Quinee J. Quintana – Drawings of equipment Jae Sung Song – Data, Results, Calculations Table of Contents Section Page I. Objective 2 II. Experiment 3 III. Theory 4 IV. Results 6 V. Sample Calculations 10
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Objective The objective of this experiment is to study how a hollow shaft would behave compared with a solid shaft, in terms of strength and rigidity. Sample Calculation For Table 2: Comparing strength and torsional stiffness of solid and hollow shafts with the same outer diameter (12mm) For hollow shaft 12/6 mm, Experimental % change in torsional stiffness, = 305.05-343.64343.64 *100% = -11.23% Theoretical % change in torsional
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Research indicates that 1/2 to 2/3 of children living in such extreme circumstances grow up and “overcome the odds” and go on to achieve successful and well adjusted lives. Being resilient doesn’t mean going through life without experiencing stress and pain. People feel grief, sadness, and a range of other emotions after adversity and loss. The road to resilience lies in working through the emotions and effects of stress and painful events. Being resilient is important if you want to become like
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