23-мавзу parchin mixli birikmalarni hisoblashga oid masalalar yechish

4. Shponkali va shlitsali birikmalarni hisoblashga oid masalalar yechish.
d_v=32mm bo`lgan valga eni b=50mm bo`lgan shkiv turli shakldagi shponkalar va shlitsalar vositasida biriktirilib, uzatilishi mumkin bo`lgan burovchi momentning eng katta qiymati aniqlansin. [σ<sub>ez</sub>] =60 MPa.
Masalaning yechilishi:
a) Prizmasimon shponka o`rnatilganda.
Valning diametriga qarab prizmasimon shponka tanlanadi: d=32 mm bo`lganda b×h_sh, t₁=4,0 Shponkaning uzunligi l=40 mm qilib olamiz.

b) Segmentsimon shponka o`rnatilganda.
Valning diametriga qarab sigmentsimon shponka tanlanadi: d=32 mm bo`lganda
b×h×d=8 ×11 ×28, t₁=8

v) Yengil seriyali to`rtburchak profilli shlitsaga o`rnatilganda:
D=36mm; d=32mm; z=8; h=0,5·(36-32)-2·0,4=1,2mm;l=50mm;
d_o`r=0,5·(36·32)=37mm
T=60·0,5·8·1,2·34·50=489,6 N·m