標(biāo)題: 材料力學(xué)里的一段話讀了幾遍也沒理解,高手來指導(dǎo)下吧 [打印本頁] 作者: shimizu 時間: 2015-9-7 09:26 標(biāo)題: 材料力學(xué)里的一段話讀了幾遍也沒理解,高手來指導(dǎo)下吧 The uniform stress condition pictured in Fig. 1-2d exists throughout ! d$ u' Q5 ?2 F' uthe length of the bar except near the ends. The stress distribution at the : g; t! Q2 _4 s4 y0 i% cend of a bar depends upon how the load P is transmitted to the bar. If the - b9 | n$ \. s; F7 D" j" X2 s1 E# lload happens to be distributed uniformly over the end, then the stress" T; _ Y( m; n0 R, u, R6 k! U3 O
pattern at the end will be the same as everywhere else. However, it is+ L2 n+ ~& {8 }& k1 p
more likely that the load is transmitted through a pin or a bolt, producing# ?8 h3 p% z q* z4 @ `. L8 n- [
high localized stresses called stress concentrations.; ]! h/ G4 t3 h7 j* X& X7 g