The syntactic design process is based on various mathematical models that predict the foam properties. These models are published in reputed journals and have been employed and cited by various researchers, scientists and academicians. Some of the models are relatively easy in terms of the scientific methods employed and others are quite complex. These models require assumptions that may not confer with real life physical behavior of materials and only provide an approximate solution with some deviations to experimental values. Rigorous research and modifications in these models has resulted in low deviations and made these models a viable method for predicting material properties.
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Terms and Equations:
Density of Syntatic Foam
The density and mechanical properties of the syntactic foam can be changed while keeping cenosphere volume fraction and particle–matrix interfacial area the same by using cenospheres of same outer radius but different inner radius. A detailed investigation on the effect of cenosphere radius ratio and specimen aspect ratio is presented by Gupta-Woldesenbet-Mensah.
Tailoring dielectric constant is key in modern electronics. The work by Shunmugasamy-Pinisetty-Gupta establsihed that the dielectric constant can be changed by varying the hollow particle volume fraction and wall thickness of glass hollow particles in vinyl ester based syntactic foams.
Co-efficient of Thermal Expansion
To compute the co-efficient of thermal expansion (CTE), the Modified Turner’s equation is used. The link to the importatnt articles are listed below: