Elastic moduli
• Young’s modulus, E– Shortening || stress
• Bulk modulus, k – Volume change / pressure
• Shear modulus, – Rotation plane stress
• Poisson’s ratio, – Ratio perp/parallel strains
11=E(L/L)
L
• Young’s modulus, E– Shortening || stress
• Bulk modulus, k – Volume change / pressure
• Shear modulus, – Rotation plane stress
• Poisson’s ratio, – Ratio perp/parallel strains
Elastic moduli
K=-V dP/dV
= dP/d
• Young’s modulus, E– Shortening || stress
• Bulk modulus, k – Volume change / pressure
• Shear modulus, – Rotation plane stress
• Poisson’s ratio, – Ratio perp/parallel strains
Elastic moduli
= xy/xy/2
• Young’s modulus, E– Shortening || stress
• Bulk modulus, k – Volume change / pressure
• Shear modulus, – Rotation plane stress
• Poisson’s ratio, – Ratio perp/parallel strains
=-22/ 11
Elastic moduli
QuickTime™ and a decompressor
are needed to see this picture.
• Young’s modulus, E– Shortening || stress
• Bulk modulus, k – Volume change / pressure
• Shear modulus, – Rotation plane stress
• Poisson’s ratio, – Ratio perp/parallel strains
Elastic moduli
QuickTime™ and a decompressor
are needed to see this picture.
Auxetic material
=-22/ 11
Beno Gutenberg
Accurate measure of the core-mantle boundary--or “Gutenberg discontinuity”--
radius (1912)
PREM radially symmetric earth model
Best fit to following data:• P and S wave travel times versus
• Body wave evidence for boundaries• crust-mantle• transition zone (410 km, 660 km jumps)• core-mantle boundary• outer-inner core boundary
• Surface wave phase velocities as a function of wave period• Rayleigh waves (SV and P)• Love waves (SH)
• Periods of free oscillations• Spheroidal (Standing Rayleigh waves + gravity)• Torsional (Standing Love waves)
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