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ID number:111772
 
Evaluation:
Published: 21.09.2010.
Language: Latvian
Level: College/University
Literature: n/a
References: Not used
Extract

1. sija

Pēc stiprības nosacījuma liecē: σ = Mmax/W < [σ]=122,2 MPa
No kurienes: Wnep. > Mmax./ [σsp]= 20*10-3/25 = 0,8 cm3= 0,0008 m3
h = 3√Mmax/[σsp] = 3√20*10-3*12/25 = 3√9,6*10-3 = 0,21m
b = h/2 = 0,21/2 = 0,105 m
A = b*h = 0,21 * 0,105 = 0,02205 m2
Tmax = 1,5*Qmax/A = 1,5*5*10-3/0,02205 = 3,4 MPa
=> [T] > Tmax ! (nosacījums izpildīts)
Secinājums: sija iztur gan bīdes, gan normālspriegumus.…

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