07.02.2015 Views

# FACITLISTE

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21<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