Optimization of composition

Kalamkarov, A. L., et al., Analysis, Design, Optimization of Composite Structures, Wiley, 1997. 

Optimization of composition, viscosity, and surface tension of the polymer solution... 

The universally accepted tests for superconductivity, namely a transition to zero resistance and a Meissner effect showing the expulsion of magnetic field, demonstrate unequivocally the existence of superconductivity in K Cso. The 18-K transition temperature is the highest yet reported for a molecular superconductor. This may be compared with the previously reported occurrence of superconductivity at 0.55 K in potassium-intercalated graphite. We expect that optimization of composition and crystallinity will lead to further improvement in the superconducting properties. ... 

Control of the sintering defects optimization of compositional gradient... 

Besides the problems of mechanical compatibility of the composite constituents, which are already present in conventional multiphase alloys, there is the problem of chemical stability which may be affected by reactions between the composite constituents (Norman etal., 1990). Thus composite developments aim at the optimization of composition and microstructure with respect to composite sta-... 

Diffusion coefficient and surface exchange coefficient measurements have been reported for the K2MF4 type oxide materials by a number of authors [4-8, 13-19] and have been complemented by electrochemical permeation measurements [20-27] all of which demonstrate the fast oxide ion conduction of hyperstoichiometric K2NiF4 type oxides. Early reports also demonstrate the relatively poor oxide ion mobility in those materials found to be hypostoichiometric [28,29]. Initial reports of the fast oxide ion conduction in La2Ni04+s [4, 6-8] have generated a number of further studies [13-19] regarding the optimization of composition and determination of the effects of anisotropy on the conduction properties of these materials. Each of these features will be discussed in more detail below. 

Liu W, Butler R, Kim HA. Optimization of composite stiffened panels subject to compression and lateral pressure using a bi-level approach. J Struct Multidiscip Optim... 

Cheng P, Gong XJ, Aivazzadeh S. Design and optimization of composite laminates repaired by external patches. In 18th international conference on composite materials, Korea 2011 August, pp. 21—6. 

Optimization of composition and the foaming process have been pursued during the years in order to improve finals foams properties, leading, for example to foam densities of 8-6kg/m [108-110]. 

Sequential impregnation of support, optimization of composition by genetic algorithm... 

Polypropylene (PP) alloys with ETP are in an early stage of development. Blends with specialty resins are even less advanced. The main source of difficulties is the antagonistic immisdbility of PP with these polymers. In many cases, addition of a compatibilizer to PP/ETP blends reduces the crystallinity, which in turn lowers the performance. Optimization of composition and blending methods is not easy. The most commonly used compatibilizing agents contain maleic anhydride functionality, e.g. maleated-PP (PP-MA). Their reaction with such ETP as PA or PET depends on the reaction conditions time, temperature and stress. The compatibilizing copolymer content increases upon reprocessing. 

Kim, M. S. (2007), Optimization of composite structures considering the manufacturing process , RhD thesis. School of Mechanical and Aerospace Engineering, Seoul National University, Korea. 

Kaufmaim M, Zenkert D, Akermo M (2010), Cost/weight optimization of composite prepreg structures for best draping strategy . Composites A, 41, 464-A72... 

The encapsulated inorganic nanoparticles can be manipulated as if they were organic macromolecules. Significant advantage of CNDs that size, net surface charge and composition can be modified one variable at a time. Optimization of composite nanodevices permits several variables to be incorporated into modeling as needed. 

The optimization approach to any activity in technology, economics or other fields is aimed at finding methods of determining the best solutions in an objective way. In particular, optimization of composite materials deals with problems of the selection of the values of several variables, which determine their composition and internal structure. Other variables that describe the conditions of mixing, vibration, placing and curing may also be included. 

Optimization of composition and processing conditions, yielding excellent optical quality, high transmission, and easy control of the refractive index by changing the relative proportion of the different precursors. 

Previous papers on the optimization of composite materials reinforced with fibres concern mostly the high strength composites [1],[2],[3]. Paper [4] deals with op>timization of the internal structure of different kind of a material composed of brittle matrix and ductile fibres. In [A] the optimum fibre orientation is determined using maximum fracture energy as a criterion. The present paper concerns the optimization of a composite element in which brittle matrix is reinforced with ductile fibres, but at another optimization criterion the optimal directions of fibre systems are determined from the minimum strain energy of the element. 

Charaaerization of composite microstmcture is arguably the most important unresolved challenge in the field of polymer nanocomposites and a major hurdle in our ability to reconcile the prediaed theoretical potential of these composites with the experimentally available materials. This is indeed a formidable task that requires systematic and collaborative efforts by both theorists and experimentalists aaoss many fields in order to unify and extend the numerous aeative solutions that have been proposed in the litaature. The development of simple and broadly applicable approaches to quantifying dispersion that capture the multiple scales of inta-est will facilitate unambiguous interpretation and optimization of composite properties. 

Khayet, M., M. N. A. Seman, and N. Hilal. 2010. Response surface modehng and optimization of composite nanofiltration modified membranes. J. Memb. Sci. 349 113-122. 

---