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What is the material poisson ratio of Epdm?
Depends on the hardness of the formulation. Poisson's ratio depends mainly on the bulk modulus and slightly on the Youngs modulus at very low strains for the subject compound. If the Youngs modulus lies between 0.92 and 9.40MN/m², Poisson's ratio lies between 0.49930 and 0.49993.
What is strain and stress?
stress is load per unit area; when an object is loaded it is under stress and strain and it stretches (strains) until it breaks at its ultimate strength. Stress i srelated to strain in the elastic region by Hooke's law: stress = elastic modulus times strain where modulus is a property of the material and strain is deflection over length
How do brittle and ductile materials differ in their behaviour in a compression test?
(a) Ductile materials: For ductile material such as mild steel, the load Vs compression diagram would be as follows(1) The ductile materials such as steel, Aluminum, and copper have stress - strain diagrams similar to ones which we have for tensile test, there would be an elastic range which is then followed by a plastic region.(2) The ductile materials (steel, Aluminum, copper) proportional limits in compression test are very much close to those in tension.(3) In tension test, a specimen is being stretched, necking may occur, and ultimately fracture fakes place. On the other hand when a small specimen of the ductile material is compressed, it begins to bulge on sides and becomes barrel shaped as shown in the figure above. With increasing load, the specimen is flattened out, thus offering increased resistance to further shortening ( which means that the stress - strains curve goes upward ) this effect is indicated in the diagram.Brittle materials ( in compression test )Brittle materials in compression typically have an initial linear region followed by a region in which the shortening increases at a higher rate than does the load. Thus, the compression stress - strain diagram has a shape that is similar to the shape of the tensile diagram.However, brittle materials usually reach much higher ultimate stresses in compression than in tension.For cast iron, the shape may be like thisBrittle materials in compression behave elastically up to certain load, and then fail suddenly by splitting or by craking in the way as shown in figure. The brittle fracture is performed by separation and is not accompanied by noticeable plastic deformation.
What is low cycle fatigue?
According to the low cycle fatigue, the nominal maximum stress values are less than the ultimate tensile stress limit. Low cycle fatigue is failure under a stress reversal after less than 1000 cycles and generally occurs in metals where strains are very high, where stresses are in the plastic region High cycle fatigue is failure under a stress reversal after more than 1000 cycles and generally occurs in metals where strains are low, caused by defects, and growth, where stresses are in the elastic region
What is the difference between engineering strain and true strain?
Without getting into all the math, the engineering strain utilizes the initial length of the specimen in the calculation, the true strain utilizes the instantaneous length of the specimen.Getting into the math:strain engineering = change in L / original Ltrue strain = ln(1+strain engineering)Engineering strain is the change in length divided by the original length, so that a 1 inch part strained 50% or .5 in/in would become 1.5 in or if strained -50% or -.5 in/in would become .5 inches. But these two strains are not the same amount of deformation since as a material is stretched further the change in length is distributed over a longer length for positive values and over a smaller length for larger values. Consider progressing from the now 1.5 in. (50%) strained part and continuing to 100% and the .5 in. (-50%) strained part and continuing to -100%. The next change in length is distributed over 1.5 in. and .5 inches respectively despite this the equation considers this change relative to the same original length of 1 inch. True strain is the change in length divided by the instantaneous length integrated from the original length to the instantaneous length. This resolves to the equation above.
What has the author Arthur Cecil Vivian written?
Arthur Cecil Vivian has written: '\\' -- subject(s): Strains and stresses, Strength of materials
What has the author Hugh Ford written?
Hugh Ford has written: 'Advanced mechanics of materials' -- subject(s): Applied Mechanics, Mechanics, Applied, Strains and stresses, Strength of materials
What has the author Maxwell Gensamer written?
Maxwell Gensamer has written: 'Strength of metals under combined stresses' -- subject(s): Strength of materials, Strains and stresses, Testing, Metals, Deformations (Mechanics)
What has the author Benjamin E Winslow written?
Benjamin E. Winslow has written: 'The Winslow tables' -- subject(s): Strains and stresses, Strength of materials
What has the author Stephen Timoshenko written?
Stephen Timoshenko has written: 'Mechanics of materials [by] Stephen P. Timoshenko [and] James M. Gere' -- subject(s): Strength of materials 'Engineering mechanics: statics' -- subject(s): Applied Mechanics, Forces and couples, Mechanics, Applied, Statics 'Theory of plates and shells' -- subject(s): Elastic plates and shells, Strains and stresses 'Collected papers' -- subject(s): Applied Mechanics, Mechanics, Applied 'Theory of elasticity, by S. Timoshenko and J.N. Goodier' -- subject(s): Strength of materials, Elasticity, Strains and stresses 'Theory of elasticity' -- subject(s): Strength of materials, Elasticity, Strains and stresses, Elasticiteit, Mechanische eigenschappen, Vaste stoffen 'The orie des vibrations a l'usage des inge nieurs' 'Theory of elastic stability' 'Engineering mechanics' -- subject(s): Applied Mechanics, Mechanics, Applied 'As I remember' 'History of the development of strength of materials in Russia' -- subject(s): Strength of materials, History 'Theory of elastic stability' 'History of strength of materials' -- subject(s): Strength of materials, Structural analysis (Engineering), Elasticity, History
What has the author Sisto Mastrodicasa written?
Sisto Mastrodicasa has written: 'Disseti statici delle strutture edilizie' -- subject(s): Deformations (Mechanics), Strains and stresses, Strength of materials
What does 'In joyful strains then let us sing' mean in the Australian anthem?
"Strains" is another word for choruses or melodies. Therefore, "joyous strains" refers to singing with joy to promote the strength and advancement of Australia.
What has the author E C O Erickson written?
E C O. Erickson has written: 'Distribution of wheel loads on timber bridges' -- subject(s): Strength of materials, Strains and stresses, Live loads, Bridges
What has the author Frederick John Keenan written?
Frederick John Keenan has written: 'The shear strength of glued-laminated timber beams' -- subject(s): Shear (Mechanics), Laminated materials, Wooden beams, Strains and stresses
State that a ship structure and its machinery are constructed largely of materials with out are elastic?
A ship structure and its machinery are constructed largely of materials that are non-elastic, like steel and aluminum. These materials are chosen for their strength, durability, and resistance to corrosion in the harsh marine environment. The non-elastic nature of these materials ensures that the ship can withstand the stresses and strains of constant motion and varying sea conditions.
What has the author F Chorlton written?
F. Chorlton has written: 'Mechanics of materials for engineers' -- subject(s): Materials, Strains and stresses
What has the author Mohd Nasir Tamin written?
Mohd. Nasir Tamin has written: 'Elasto-plastic finite element program and numerical study of a compact specimen' -- subject(s): Mathematical models, Strains and stresses, Elastoplasticity, Strength of materials
