Page 25 - Mechanical Engineer's Data Handbook

14 MECHANICAL ENGINEER’S DATA HANDBOOK

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I .2.6 Properties of weld groups - welds
treated as lines
[ (Zb~d)~ b2(b+d)’)
(4) Z=(bd+d2/6)t; J= ~- It
Symbols used: (26+d)
Z = bending modulus about axis XX 6’
J =polar second moment of area y=- 2b+d
t = weld throat size
(1) Z = d2t/3; J= dt(3b2 + d2)/6

(2) Z = bdt; J = bt(3d2 + b2)/6

(5) Z=(2bd+d2)t/3 (at top); J= [(6+2d)’ -d’(b+d)’] t
~-
12 (b + 2d)
d2(26+d)t dZ
Z= (at bottom); x=-
X-- dl x 3(b+d) b+2d
11
1
1 - b 4

[(b + d)4 - 6b2dz] I
(3) Z = (4bd + d2)t/6 (at top); J =
12(b+d)
z= (4bd2 + d3)t (at bottom); x=- dZ y=- bZ
6(2b +d) 2(b+d); 2(b+d)