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Q: How many elastic constants wall there be in a non-isotropic, non-homogeneous material?
  • A. 15
  • B. 9
  • C. 21
  • D. 20
Correct Answer: Option C - No. of independent elastic constants & total elastic constants– • Homogenous & isotropic (steel) material – 2(4) • Orthotropic (wood) material – 9(12) • Anisotropic material – 21 (∞)
C. No. of independent elastic constants & total elastic constants– • Homogenous & isotropic (steel) material – 2(4) • Orthotropic (wood) material – 9(12) • Anisotropic material – 21 (∞)

Explanations:

No. of independent elastic constants & total elastic constants– • Homogenous & isotropic (steel) material – 2(4) • Orthotropic (wood) material – 9(12) • Anisotropic material – 21 (∞)