GATE 2021 BM – Question 52
A cylindrical biomaterial sample is 10 cm long and 1 cm in diameter. A 50 kN tensile force elongates it by 4 mm. Compare its tensile modulus with bone 5–20 GPa, tendon 0.5–1 GPa, ligament 20–400 MPa and articular cartilage 3–10 MPa. Which tissue is the suitable match?
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Show answer and explanation
Correct answer: (A) Bone
Explanation
Area=π(.01)²/4=7.854×10⁻⁵ m², giving stress 50000/area≈636.62 MPa. Strain=.004/.1=.04. Modulus=stress/strain≈15.915 GPa, inside the given bone interval and far above the other ranges. Therefore A.