[請益] Bolt 的問題
A typical bolted joint of the type shown in the following
Figure use a 1/2-13 UNC bolt, and the length of the bolt
and length of the housing is the same. The threads stop
immediately above the nut. The bolt is steel with
Su=101,000 psi, Syp=85,000 psi, and Sf=50,000 psi.
The thread stress concentration factor is 3. The effective
area of the steel housing is 0.88 in^2. The load fluctuates
cyclically from zero to 2500 lb at 2000 at cpm.
(a) Find the existing factor of safety for the bolt if
no preload is present,
(b) find the minimum required value of preload to prevent
loss of compression in the housing, and
(c) find the existing factor of safety for the bolt
if the preload in the bolt is 3000 lb.
請問一下 thread stress concentration factor is 3
是代表什麼意思?
這題不知道從何下手...謝謝大家了!!!
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 218.210.165.83
推
06/11 21:31, , 1F
06/11 21:31, 1F
Mechanical 近期熱門文章
PTT職涯區 即時熱門文章