Question

The graph here shows the stress vs. strain graphs for two components of bone: cortical bone (which is dense and compact and present on the outside of bones) and trabecular bone (which has a porous, spongy structure and is found on the inside of bones). Trabecular bone has two lines on the graph corresponding to two different densities (different degrees of porousness). a. Rank the three types of bone based on their breaking strength – the amount of stress they can withstand before breaking. Stress (MPa) 200 150 Cortical bone 1.85 g/cm³ 100 50 0.90 g/cm³ Trabecular bone 0.30 g/cm³ 0 5 10 15 20 25 Strain (%) b. Rank the three types of bone based on their extensibility – how far they can deform before breaking. c. What would be the advantage of having composite bones that include both cortical and trabecular bone? d. Use the graph to estimate Young’s modulus for each type of bone corresponding to small stresses.

          The graph here shows the stress vs. strain graphs for two components of bone: cortical bone (which is dense and compact and present on the outside of bones) and trabecular bone (which has a porous, spongy structure and is found on the inside of bones). Trabecular bone has two lines on the graph corresponding to two different densities (different degrees of porousness).
a. Rank the three types of bone based on their breaking strength – the amount of stress they can withstand before breaking.

Stress (MPa)
200
150 Cortical bone 1.85 g/cm³
100
50 0.90 g/cm³
Trabecular bone 0.30 g/cm³
0 5 10 15 20 25
Strain (%)

b. Rank the three types of bone based on their extensibility – how far they can deform before breaking.
c. What would be the advantage of having composite bones that include both cortical and trabecular bone?
d. Use the graph to estimate Young’s modulus for each type of bone corresponding to small stresses.

The graph here shows the stress vs. strain graphs for two components of bone: cortical bone (which is dense and compact and present on the outside of bones) and trabecular bone (which has a porous, spongy structure and is found on the inside of bones). Trabecular bone has two lines on the graph corresponding to two different densities (different degrees of porousness).
a. Rank the three types of bone based on their breaking strength – the amount of stress they can withstand before breaking.

Stress (MPa)
200
150 Cortical bone 1.85 g/cm³
100
50 0.90 g/cm³
Trabecular bone 0.30 g/cm³
0 5 10 15 20 25
Strain (%)

b. Rank the three types of bone based on their extensibility – how far they can deform before breaking.
c. What would be the advantage of having composite bones that include both cortical and trabecular bone?
d. Use the graph to estimate Young’s modulus for each type of bone corresponding to small stresses.

Added by Barbara W.

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