View chapter 3 Elasticity.ppt from ECO 415 at Universiti Teknologi Mara. This longitudinal modulus of elasticity is called Young’s Modulus . Fatigue. CHAPTER 3: Elasticity and Its Application 1) Elasticity of demand Price elasticity of demand • Measurement and 5. Stress-Strain behaviour for different materials. Introduction. 9 . Elastic Region in Stress-Strain Curve •Relationship between stress and strain is linear •Material returns to its original length when stress is removed Hooke's Law: e = E e where E = modulus of elasticity •E is a measure of the inherent stiffness of a material •Its value differs for different materials 2.5 State of Strain at a Point 73 2.6 Engineering Materials 80 2.7 Stress–Strain Diagrams 82 2.8 Elastic versus Plastic Behavior 86 2.9 Hooke’s Law and Poisson’s Ratio 88 2.10 Generalized Hooke’s Law 91 2.11 Hooke’s Law for Orthotropic Materials 94 2.12 Measurement of Strain: Strain Rosette 97 2.13 Strain Energy 101 2.14 Strain Energy in Common Structural Members 104 7. It can add the load directly onto the forces that hold the constituent atoms or molecules together, as occurs in simple crystalline (includ- Presentation Summary : Modulus of elasticity of materials depends on bond strength between atoms, stronger the bond, larger will be the modulus of elasticity. When a material is subjected to an external load of such magnitude that deformation continues only with increase in load, and on removing the load it regains its original shape, then the material is said to have elasticity. In these other axis systems, the material may have “more ” elastic components. 8. 6. Elasticity. 6. But it really does n ’ t. (you can’ t “ create ” elastic components just by describing a material in a different axis system, the inherent properties of the material stay the same). 6.37 x 10 Pa 3.08 x 10. 7) ELASTICITY :It is the property of a material to regain its original shape after the removal of load. Pseudoelasticity is one of the most commonly observed phenomena in SMA, Fig. Modulus = 207 x 10. For proportional multiaxial stress state, the comparisons between theory and experiments are shown in Fig. Values of the modulus of Creep. Materials – When the moduli of elasticity of various materials that make up the beam structure are not negligible and they should be accounted for, then procedure for calculating the normal stresses and shearing stresses on the section will follow different approach, … Mechanical Properties Of Materials PPT. Pa. Pa This longitudinal modulus of elasticity is called Young’s Modulus and is denoted by the symbol . Find the modulus of elasticity for steel. 1. Elastic constants. Time dimension: In short run, demand for most goods are inelastic because lack of substitutes. FAQ. 2.It is seen that the experimental data is well accounted for by the theory. Stress Modulus Strain Modulus = 207 x 10. Y. Elastic vs non-elastic materials. Basic Elasticity and viscoelasticity In the physically stressful environment there are three ways in which a material can respond to external forces. Income level: Higher income group people will tend to have inelastic demand because they become less sensitive towards price change not to poor people 17 Price Elasticity of Demand (PED) L L. 7-4. Long run demand is more elastic because many substitutes are available due invention and innovation. 9 . Teaching presentation Editable teacher PowerPoint presentation and student investigation using the context of INEOS TEAM UK’s cutting edge race boat and archives from the Lloyd's Register Foundation, to examine how forces act on an object affect different materials. 1 shows the comparison between theoretical prediction and experimental data in uniaxial stress state. 3. Many materials, when in service, are subjected to forces or loads; examples include the aluminum alloy from which an airplane wing is constructed and the steel in an automobile axle.
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