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

In summary, composite material density refers to the mass per unit volume of a composite material and is calculated by dividing the mass by the volume. The factors that affect density include the materials used, manufacturing process, and any voids or defects. Generally, a higher density can result in higher strength and stiffness, but this can vary depending on the materials and process used. In engineering and design, composite material density is important for determining weight, strength, and stiffness, and is optimized for specific applications.
  • #1
joemte
11
0
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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  • #2
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
 

1. What is composite material density?

Composite material density refers to the mass per unit volume of a composite material. It is a measure of how much a certain amount of the material weighs in relation to its volume.

2. How is composite material density calculated?

Composite material density is calculated by dividing the mass of the material by its volume. The resulting value is typically expressed in units of grams per cubic centimeter (g/cm3) or kilograms per cubic meter (kg/m3).

3. What factors can affect the density of a composite material?

The density of a composite material can be affected by various factors such as the type and proportion of materials used, the manufacturing process, and any voids or gaps present in the material. Different types of composites, such as fiber reinforced composites or particle reinforced composites, can also have different densities.

4. How does the density of a composite material compare to that of traditional materials?

In general, composite materials tend to have lower densities compared to traditional materials such as metals and alloys. This is because composites are typically made up of a combination of lighter materials, such as polymers or ceramics, and can have a higher strength-to-weight ratio.

5. Why is the density of a composite material important?

The density of a composite material is important for various reasons. It can affect the mechanical properties of the material, such as its strength and stiffness. It can also impact the weight and overall performance of a product or structure made from the material. Additionally, knowing the density of a composite material is essential for designing and manufacturing processes.

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