The uniform stress condition pictured in Fig. 1-2d exists throughout
+ i/ w0 u# ^* m% mthe length of the bar except near the ends. The stress distribution at the) ?; _8 B, a$ B
end of a bar depends upon how the load P is transmitted to the bar. If the7 D: e; W6 P9 w& q) I9 y& j a
load happens to be distributed uniformly over the end, then the stress- C6 f' d6 d/ r p
pattern at the end will be the same as everywhere else. However, it is
& j; D, M6 _' K( _- \. Kmore likely that the load is transmitted through a pin or a bolt, producing- I w' n* z& u2 \% j. O+ j
high localized stresses called stress concentrations.
/ w; O4 n; P# c9 |* l9 d
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