ELASTIC!@!!!!
No offense but if you know what plastic and elastic deformation is you should know that once a metal enters its plastic range it cannot return to its original length. You should also realize that each successive loading cycle will eventually cause the metal to fail.
An example of this is bending a paper clip back and forth until it breaks.
Adam Borkowski has written: 'Analysis of skeletal structural systems in the elastic and elastic-plastic range' -- subject(s): Elastic analysis (Engineering), Structural frames
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Plastic is elastic due to its molecular structure, which allows its polymer chains to stretch and return to their original shape. This property makes plastic flexible and able to deform without breaking, making it ideal for a wide range of applications.
It also increases. It increases linearly with stress in the elastic range, then increass more rapidly once the material is plastic ( yielded).
Hooke's law describes the relationship between the force applied to a spring and the resulting extension or compression of the spring, as long as the material remains in the elastic deformation range of the stress-strain curve. Beyond the elastic limit, the material may exhibit plastic deformation, and Hooke's law may not apply.
Photo chromic plastic properties are; the rear surface of the glass has a different radius than the front surface of the plastic, so that the space between the lenses forms a tapered gap which is filled by the elastic adhesive. The edge thickness of the elastic adhesive is sufficient to insure that the increase in diameter of the plastic layer with respect to the diameter of the glass layer due to differences in the thermal expansion characteristic of the glass and the plastic will not damage the composite lens even over a temperature range greater than 300° F.
Materials can typically withstand a range of stress known as the elastic limit without causing permanent deformation or altering material properties. Within this range, the material can deform reversibly, returning to its original shape once the stress is removed. Beyond the elastic limit, applying stress can cause plastic deformation and alter the material's properties.
Plastic is a synthetic material made from a wide range of organic polymers such as polyethylene, PVC, nylon, etc., that can be molded into shape while soft and then set into a rigid or slightly elastic form. Rubber is a tough elastic polymeric substance made from the latex of a tropical plant or synthetically. Hard rubber is a rubber that is stiff and relatively inflexible. It is made by vulcanizing natural rubber with a high percentage of sulfur.
Most of the materials can be considered elastic at least for a specific range. For example, Wood is elastic when we compare it with glass. Their modulus of elasticity cannot be calculate. However;It is anisotropic material. (its elasticity will be change if your loading parallel to its fibers or perpendicular.)
Strees decreases after the plastic range because the material has releived the strees through movement.
Plastic brochure holders come at a pretty cheap range, and usually only cost maybe fifty dollars at most. http://www.plasticfab.com/ has a wide range of holders.
No difference. The way you use makes the difference. Normally HSFG bolts are HT only having grade 8.8 or above and tightened up to the plastic range. They cannot take the