Metallized plastics, dynamic fracture

Dynamic Fracture Mechanism of Thin Metallized Plastics via the Blister Test... 

The volume is divided into three parts Part I. Metallization Techniques and Properties of Metal Deposits, Part II, Investigation of Interfacial Interactions," and Part III, "Plastic Surface Modification and Adhesion Aspects of Metallized Plastics. The topics covered include various metallization techniques for a variety of plastic substrates various properties of metal deposits metal diffusion during metallization of high-temperature polymers investigation of metal/polymer inlerfacial interactions using a variety of techniques, viz., ESCA, SIMS, HREELS, UV photoemission theoretical studies of metal/polymer interfaces computer simulation of dielectric relaxation at metal/insulalor interfaces surface modification of plastics by a host of techniques including wet chemical, plasma, ion bombardment and its influence on adhesion adhesion aspects of metallized plastics including the use of blister test to study dynamic fracture mechanism of thin metallized plastics. 

Dynamic load applied using JWL equation of state for 2D axisymmetric models having 100 mm blasthole diameter in elasto-plastic rock obeying metal plasticity rules. Volumetric strain (scalar quantity) apportioned by statistical fracture mech principals used for fractures representation. 

The EAM and MEAM potentials once determined from electronics principles calculations [178] have been used to reproduce physical properties of many metals, defects, and impurities. For example, EAM molecular statics, molecular dynamics, and Monte Carlo simulations were performed on hydrogen embrittlement effects on dislocation motion and plasticity [46,179-181]. These potentials have been used to analyze plasticity [74,144,145,148-150,182,183], cracks and fracture [117,184], and fatigue [119, 120, 185, 186]. 

Twelve precracked Charpy impact test specimens each of base metal (longitudinal and transverse) and weld metal material are provided in addition to the standard Charpy impact specimens. This quantity is sufficient to determine fracture toughness properties (critical stress intensity factors under dynamic loading) over the range extending from linear elastic to elastic-plastic fracture. 

It is obvious that in rubber processing there will be slip, because the surface of processing equipment in contact with gum rubbers and compounds is usually shiny. This is in contrast to plastic processing equipment, in which the surfaces become coated with a thin layer of the degraded material. With plastics this fact indicates the velocity of the melt at the metal interface is zero, i.e., laminar shear flow. A study of slip is multi-faceted, because there are many types of slip, a steady slip, slip with a lubricated layer, slip-stick, slip involving a fracture at the interface or ruhhing like a dynamic friction measurement. 

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