Question

Figure 1 shows a polypropylene foam. At room temperature, the microstructure of the foam will fail via plastic deformation under compressive loading. Calculate the plateau stress of the foam using Equation (1). Assume the yield strength of PP is 32MPa and the foam has a relative density of 0.25. Give your answer in MPa correct to 1 decimal place.\\ $\frac{\bar{\sigma}_{pl}}{\sigma_{f,s}} = 0.3 \left(\frac{\bar{\rho}}{\rho_s}\right)^{3/2}$ Eq (1) Figure 1. Polypropylene foam. Answer:

          Figure 1 shows a polypropylene foam. At room temperature, the microstructure of the foam will fail via plastic deformation under compressive loading. Calculate the plateau stress of the foam using Equation (1). Assume the yield strength of PP is 32MPa and the foam has a relative density of 0.25. Give your answer in MPa correct to 1 decimal place.\\
$\frac{\bar{\sigma}_{pl}}{\sigma_{f,s}} = 0.3 \left(\frac{\bar{\rho}}{\rho_s}\right)^{3/2}$
Eq (1)
Figure 1. Polypropylene foam.
Answer:

Figure 1 shows a polypropylene foam. At room temperature, the microstructure of the foam will fail via plastic deformation under compressive loading. Calculate the plateau stress of the foam using Equation (1). Assume the yield strength of PP is 32MPa and the foam has a relative density of 0.25. Give your answer in MPa correct to 1 decimal place.

(σ̅pl)/(σf,s) = 0.3 ((ρ̅)/())^3/2
Eq (1)
Figure 1. Polypropylene foam.
Answer:

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