The GATE Grind

GATE 2022 BM – Question 48

Biomaterials and Tissue Engineering · Biomaterial Properties · 2 marks · Multiple choice

Match the stress–strain curves X,Y,Z shown to the materials.

Diagram for GATE 2022 BM question 48
  1. X titanium; Y hydroxyapatite; Z polyethylene
  2. X hydroxyapatite; Y titanium; Z polyethylene
  3. X hydroxyapatite; Y polyethylene; Z titanium
  4. X polyethylene; Y titanium; Z hydroxyapatite

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Show answer and explanation

Correct answer: (B) X hydroxyapatite; Y titanium; Z polyethylene

Explanation

X is steep and fails at small strain, characteristic of a stiff brittle ceramic such as hydroxyapatite. Y bears higher stress while plastically deforming, characteristic of titanium. Z has lower stiffness and stress with substantial deformation, characteristic of polyethylene. Therefore B.

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