Plastic structure

Mroz Z. (1963) Limit analysis of plastic structures subject to boundary variations. Arch. Mech. Stos 15, 63-76. 

Bed limiters are fabricated as a light weight metal or plastic structure. Usually a mesh backing... 

With computers the finite element analysis (FEA) method has greatly enhanced the capability of the structural analyst to calculate displacement, strain, and stress values in complicated plastic structures subjected to arbitrary loading conditions. Details on FEA are reviewed in Chapter 2, Finite Element Analysis. 

Another loading condition in underwater applications is the application of external hydrostatic stress to plastic structures (also steel, etc.). Internal pressure applications such as those encountered in pipe and... 

Tliere is another type of application where the damping effect of plastic structures can be used to advantage. It has a long although not obvious history. The early airplanes used doped fabric as the covering for wings and other aerodynamic surfaces. The dope was cellulose nitrate and later cellulose acetate that is a damping type of plastic. Conse-... 

Plastics are already vital for operation on top and within the sea, even though comparatively little is known about the sea. To develop more knowledge, radically new basic ideas and approaches were needed, such as consideration of plastic structural hulls for deep submersibles, or elastomeric plastics for undersea housing and storage. 

Property Steel Solid Plastic Structural Foam Ribbed Solid0... 

Dielectric loss The dielectric loss factor represents energy that is lost to the insulator as a result of its being subjected to alternating current (AC) fields. The effect is caused by the rotation of dipoles in the plastic structure and by the displacement effects in the plastic chain caused by the electrical fields. The frictional effects cause energy absorption and the effect is analogous to the mechanical hysteresis effects except that the motion of the material is field induced instead of mechanically induced. 

Plastics are suitable for most optical applications that utilize transparent materials, including color carriers. Color filters have all types of standard transmission characteristics that can be made and, because of the uniqueness of the plastic structure, a large number of dichroic and trichroic materials are possible that have different colors when viewed from different angles. One application for this is in polarizing filters. 

The following example provides information on designing of plastic structural products to take static loads. It is a structural problem common to a number of different structures to show how the different structural requirements will affect the choice architectural designers has to make. The design problem will be a roof section which may be used for anything from a work shed,... 

Other schemes involving dichroic dyes with heat and electrical fields are also possible. Each of the possibilities could use the plastic structure of the substrates, its durability, or both. This approach would recycle the material for carrying the printed messages at the point of use, eliminating handling and distribution costs, and would require a fraction of the enormous amount of paper now consumed in delivering news and other literary material. The newspaper or periodical would have the familiar size and appearance and would present little change to the reader. The convenience of real on time home delivery and other built in aspects of the system would make it a useful successor to the present one. (This is just a point to discuss and amuse oneself but it could happen.)... 

The behavior of plastic structures under compression plays a critical role in numerous applications. It has been recognized that the buckling of metals under elevated temperatures presents important distinctions from the classical Eulerian case, [11]. During an experimental study, [12], buckling times were registered for a range of compressive loads applied to the top of compression molded and annealed thermoplastic samples (see Fig. 2). A typical time - load dependence is shown in Fig. 3. 

Membranes are highly viscous, plastic structures. Plasma membranes form closed compartments around cellular protoplasm to separate one cell from another and thus permit cellular individuality. The plasma membrane has selective permeabilities and acts as a barrier, thereby maintaining differences in composition between the inside and outside of the cell. The selective permeabilities are provided mainly by channels and pumps for ions and substrates. The plasma membrane also exchanges material with the extracellular environment by exocytosis and endocytosis, and there are special areas of membrane strucmre—the gap junctions— through which adjacent cells exchange material. In addition, the plasma membrane plays key roles in cellcell interactions and in transmembrane signaling. 

The following general results are intended to present some of the more important conclusions concerning the relationship between plasticizer action and plasticizer structure. 

G. Harkegard Application of the finite element method to cyclic loading of elastic-plastic structures containing effects. Int. J. Fract. 9, 322 (1973)... 

Others. Other metal structured packinge reported in the literature include Ralupak (3) and Rombopak (291. Plastic structured packing. 

Measurements on Reinforced Plastics (Structure Effect). Polymeric substrates (Poly-butylterephthalate PBT) with different amount of glass fibers were painted with a typical coating system for plastics. The complete coatings... 

The amorphous plastic is the term used that means formless describing a TP having no crystalline plastic structure. They form no pattern... 

The above mechanistic explanations assume that the plasticizer molecules are not permanently bound to the polymer chains. Since these interactions are relatively weak, there is likely a dynamic adsorption/desorption at various locations among neighboring polymer chains. Accordingly, the plasticizer structure may be fine-tuned to affect its solubility/miscibility with the polymer, as well as its interactions with... 

In the Netherlands, bulk butter is often processed in a Mikrofix homogenizer to give it more plastic structure before it is repackaged for retailing (109). 

If we imagine a foamed plastic structure consisting entirely of spherical cells of diameter d arranged in a cubic lattice, then for a wall thickness of 5 the weight of the polymer (g ) per cell will be ... 

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