MME 110 · Metallic Materials
Session 3 · Hour 1 · Force on a cut
Instructor cue 나누기 전에 그려라.
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Force on a cut
σ ≈ 50.0 MPa. ε = 0.0020. Hooke only while it springs.
Name the cut
0/4
Force on a cut face. Often megapascal.
Change of length over original length. A ratio.
In the elastic range, stress equals E times strain.
E. How stiff while it still springs back.
CheckA large force on a large face may be a small stress. Draw the cut. σ=F/A. ε=ΔL/L. σ=Eε in elastic range.