What is the formula for calculating the density of a composite material?

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SUMMARY

The formula for calculating the density of composite materials involves a weighted average based on the proportions of the constituent materials. Specifically, if one material weighs 30 kg and the other weighs 70 kg, the resultant density can be expressed symbolically as a combination of their densities multiplied by their respective weight fractions. This approach provides a straightforward method to determine the overall density without needing complex equations or additional parameters like Young's modulus.

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joemte
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Homework Statement
A composite material of silicon carbide-filled borosilicate glass is designed with a mixture of 30% of silicon carbide by weight. Given the densities of the consituent materials below:

Silicon carbide = 3.2g cm^-3 (Young's modulus 406 GPa)
Borosilicate glass = 2.23g cm^-3 (Young's modulus 63.7 GPa)
Relevant Equations
None
Does anyone have an equation for the resultant density of the composite materials? Having a look around the internet and I can't find anything, there was this one website that gave me a step-by-step but the answers did not match (sciencing.com)
 
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Hi,

Your problem lies with
Homework Equations: None
Forget about the Young modulus and add 30 kg of the one to 70kg of the other in a symbolic expression
 

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