Plasticization energy

In the case of metals, R is mainly plastic energy associated with the formation of a crack tip plastic zone. It is obvious from Eq. 9 that, for plane stress,... 

True vs. apparent strength the visco-plastic energy dissipation dominated the magnitude of the peel strength. However, little dissipation occurs if the interface becomes very weak. In other words, some influxes are necessary to produce sufficient stress to activate the viscoelastic deformation in the body of the A. 

This paper demonstrates the technical feasibility of a plastics energy recovery plant using circulating fluidised bed technology from Ahlstrom of Finland. Full details are given of a two-phase test run conducted at Ahlstrom s pilot plant in Karhula, in order to obtain information on the process behaviour when combusting different types of plastics waste. Results are presented and conclusions drawn. 

Hickman, J.C. (1975). Environmental unpredictability and plastic energy allocation strategies in the annual Polygonum cascadense (Polygonaceae). Journal of Ecology, 63, 689-701. 

Plastic energy dissipation and frictional energy dissipation, in that order of importance, where compacted polymer particulates are relentlessly deformed by twin rotor devices, which rapidly raise their temperature and create regions of melts. 

On the other hand, we discussed and presented in physical terms the very powerful melting mechanisms resulting from repeated, large deformations, forced on compacted particulate assemblies by twin co- or counterrotating devices. These mechanisms, which we refer to in Section 5.1, are frictional energy dissipation (FED), plastic energy dissipation (PED), and dissipative mix-melting (DMM). 

Fig. 10.60 Compressive stress-strain behavior of PS and LLDPE at 25°C and crosshead speed of 25.4 mm/min. At a compressive stress level of 20 MPa the deformation of the soft LLDPE is large, in the dissipative region and nearly twenty times the PS deformation, which is of the order of 0.04, in the elastic nondissipative range. [Reprinted by permission from B. Qian, D. B. Todd, and C. G. Gogos, Plastic Energy Dissipation (PED) and its Role in Heating/Melting of Single Component Polymers and Multi-component Polymer Blends, Adv. Polym. Techn., 22, 85-95 (2003).]...

B. Qian, D. B. Todd, and C. G. Gogos, Plastic Energy Dissipation and its Role on Heating/ Melting of Single-component Polymers and Multi-component Polymer Blends, Adv. Polym. Technol., 22, 85-95 (2003). 

B. Qian and C. G. Gogos, The Importance of Plastic Energy Dissipation (PED) to the Heating and Melting of Polymer Particulates in Intermeshing Co-rotating Twin Screw Extruders, Adv. Polym. Tech., 19, 287-299 (2000). 

C. G. Gogos and B. Qian, Plastic Energy Dissipation during Compressive Deformation of Individual Polymer Pellets and Polymer Particulate Assemblies, Adv. Polym. Tech., 21, 287-298 (2002). 

Flory, P. J. 1953. Principles of polymer chemistry. Ithaca, NY Cornell University Press. Guillet, J. 1974. Plastics, energy, and ecology—a harmonious triad. Plastics Engineering August 48-56. 

Fig. 15 Evolution of the plastic energy, Gpiast) of a non-nudeated and of a -nucleated PP in between - 60 and 120 °C a puncture tests, b Charpy tests. Tests performed on injection molded specimens...

Basu and Van der Giessen [9] extended the above isothermal formulation to account for thermal effects associated with the heat dissipated by plastic dissipation of the bulk and from the craze process. The plastic energy dissipation rate per unit volume is specified in Eq. 4, so that the energy balance inside the material can be written as... 

The fracture energy of polystyrene is a combination of the plastic energy needed to form crazed material from uncrazed material, the energy to create the exposed surface in the craze, the elastic strain energy stored in the craze, and the energy to create new surface when the craze ruptures (5, 9). As the molecular weight decreases, the amount of crazing and... 

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