Elastic Strain of Wood Along the Grain
Easywoodstrain
Wood loaded parallel to the grain has E = 10 GPa. At a normal stress of 20 MPa, the elastic strain is most nearly:
- A0.0002
- B0.02
- C0.20
- D0.002
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Answer: D. 0.002
ε = σ / E = 20 MPa / 10 000 MPa = 0.002. The other values come from slipping a power of ten when converting GPa to MPa.
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