FACITLISTE
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7. MASKINELEMENTER<br />
21<br />
7. MASKINELEMENTER<br />
167. a) σ = 78 MPa < σ til<br />
= 85 MPa<br />
τ = 3,25 MPa < τ til<br />
= 65 MPa<br />
b) σ = 66,3 MPa < σ til<br />
= 85 MPa<br />
τ = 2,6 MPa < τ til<br />
= 65 MPa<br />
168. a) torsion - varierende<br />
b) d = 35,39 mm<br />
169. Fladetryk i gaffel: p = 27,5 MPa < p til<br />
= 50 MPa<br />
Fladetryk i midterstykke:<br />
p = 34,5 MPa < p til<br />
= 75 MPa<br />
Forskydning:<br />
Bøjning:<br />
τ = 17,5 MPa < τ til<br />
= 90 MPa<br />
σ b<br />
= 34,4 MPa < σ btil<br />
= 85 MPa<br />
170. a) V A<br />
= 57,6 kN V B<br />
= 38,4 kN<br />
b) M 1<br />
= 2880 kNmm<br />
M 2<br />
= 10368 kNmm<br />
M 3<br />
= 13824 kNmm<br />
M 4<br />
= 11904 kNmm<br />
M 5<br />
= 1920 kNmm<br />
c) d 1<br />
= 69,7 mm<br />
d 2<br />
= 106,8 mm<br />
d 3<br />
= 117,6 mm<br />
d 4<br />
= 111,9 mm<br />
d 5<br />
= 60,9 mm
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