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ID number:548473
 
Author:
Evaluation:
Published: 17.11.2015.
Language: Latvian
Level: College/University
Literature: n/a
References: Not used
Extract

Secinājumi: Iegūtie koka sijas normālspriegumi stiepē un spiedē [σ+] = 424.15 MPa, [σ -] = 565.23 MPa neatbilst nosacījumiem[σ]=235 MPa, tomēr iegūtie bīdes spriegumi (10.19 Mpa)< [t] = 150 MPa, kas atbilst nosacījumam. Lai sija izturētu nosacītos ormālsriegumus, nepieciešamais pretestības moments Wx aprēķināms pēc formulas W=M_max/σ=75.6kN/235MPa=321.70〖cm〗^3. No sortimenta tabulas nepieciešamā dubult-T profila tērauda sija ar Wx=371cm3 ir Nr 27.…

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