Elastic Elasticity

The foUowing variables can affect a material s bulk density. (/) Moisture higher moisture content often makes a material mote compressible. (2) Particle size and shape often, the finer the bulk soHd, the mote compressible it is. The shape of the particles can affect how they fit together and thein tendency to break while being compacted. (3) Temperature some materials become mote compressible as thein temperature increases. This could be due, for example, to softening of the particles. (4) Particle elasticity elastic materials tend to deform significantly when they ate compressed. 

Fig. 2.2. The characteristic stress pulses produced by shock loading differ considerably depending upon the stress range of the loading. The first-order features of the stress pulses can be anticipated from critical features of the stress-volume relation. In the figure, P is the applied pressure and HEL is the Hugoniot elastic limit. Characteristic regimes of materials response can be categorized as elastic, elastic-plastic, or strong shock.

Maximum Maximum Specific Elastic Elastic Energy Maximum... 

Member properties are determined in accordance with Chapter 5, Required dynamic properties usually include unit weight, modulus of elasticity, elastic yield strength, and allowable deformations. Additional properties include post-yield strength or membrane resistance. 

Mendelson (169) studied the effect of LCB on the flow properties of polyethylene melts, using two LDPE samples of closely similar M and Mw plus two blends of these. Both zero-shear viscosity and melt elasticity (elastic storage modulus and recoverable shear strain) decreased with increasing LCB, in this series. Non-Newtonian behaviour was studied and the shear rate at which the viscosity falls to 95% of the zero shear-rate value is given this increases with LCB from 0.3 sec"1 for the least branched to 20 sec"1 for the most branched (the text says that shear sensitivity increases with branching, but the numerical data show that it is this shear rate that increases). This comparison, unlike that made by Guillet, is at constant Mw, not at constant low shear-rate viscosity. 

Figure 4.9 Elastic deformations of calamitic, rod-like liquid crystals in the nematic phase. The corresponding elastic elasticity constants are K, (splay), /<2 (twist), and Kj (bend). K, has the largest influence on the threshold voltage, of TN cells [23f].

Researchers [6] showed that the microstructure of RubCon has elastic, elastic-plastic, and viscous phases. The amount of elastic in the composite is less in comparison with others, and consequently deformability of RubCon at action a long-term and a short-term loadings in the greater degree is determined by elastic and elastic-plastic deformations. The increase of the strength of RubCon and the modulus of elasticity at compression and the decrease of its ultimate deformations at negative temperatures can be explained by increases in viscous phase viscosity and partial transformation of an elastic-plastic phase of a composite in elastic. The increase in the elastic phase results in embrittlement of the composite but no changes in its stress-strain state. 

Elasticity of blends Elasticity of drops Elasticity of emulsions Elasticity of suspensions Elasticity Elasticity, melt... 

Ektar Performance Plastic s trade name for its family of copolyester thermoplastic elastomer, elastic constant See modulus of elasticity, elastic deformation See deformation, elastic en-ergy, plastic work rheology, elastic fracture See melt fracture, elastic hysteresis See hysteresis, elastic, elasticity A property that causes plastic to return to its original size and shape after removal of a force causing deformation. See coefficient of elasticity deformation and toughness extruder-web stretching and... 

Rock stratum Thickness Bulk modulus of elasticity Elastic shear modulus Gravity density Angle of internal friction Cohesion Uniaxial compressive strength Uniaxial tensile strength... 

Macroscopic > 10-2 Mechanical testing strain measurement Theory of elasticity elastic fracmre mechanics... 

Elasticity (1664) n. A property that defines the extent to which a material resist small deformations from which a material recovers completely when deforming force is removed. When the deformation is proportional to the applied load, the material is said to exhibit Hookean elasticity or ideal elasticity. Elasticity equals stress divided by strain. Shah V (1998) Handbook of plastics testing technology. John Wiley and Sons, New York. Elias HG (1977) Macromolecules, vols 1-2. Plenum Press, New York. Weast RC (ed) (1978) CRC handbook of chemistry and physics, 59th edn. The Chemical Rubber Co., Boca Raton, EL. 

Under static conditions, the elastic properties of solids have been studied in case study B2 Elasticity of Solids in Chapter 5, in which the capacitive relationship was modeled by two reduced elastances (elasticities), depending on the mode of deformation, by traction or by shear... 

Spring constant, elastance (elasticity) [translational mechanics]... 

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