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The amount of compressionBone has a Young's modulus of about 18x10^9 Pa under...

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olivia61 | Student, Undergraduate | (Level 1) eNoter

Posted March 26, 2010 at 2:26 AM via web

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The amount of compression

Bone has a Young's modulus of about 18x10^9 Pa under compression, it can withstand a stree of about 160x10^6 Pa before breaking.  Assume that of a femur (thighbone) is 0.50 m long, and calculate the amount of compression this bone can withstand before breaking.

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neela | High School Teacher | (Level 3) Valedictorian

Posted April 5, 2010 at 1:08 PM (Answer #1)

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The young's modulus E of the bone  is defined  as thr ation of tenile stress/ tensile strain. Or

E = tensile stress/tensile strain strain.Or

18*10^9 pa = 160*10^6/ (strain/length of bone)). Therefore,

strain = [160*10^6/(18*10^9)](0.5m)

1/225 m

=0.00444444 m

So the amount of breaking strain is 1/225m or 0.004444m

 

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