MT-1620 al.2002 Figure 13.1 General Geometry of a Beam C2oss-5ACT/oA a)long&thin→>b,h b)loading is in z-direction c)loading passes through "shear center= no torsion/twist (we'l define this term later and relax this constraint d)cross-section can vary along X 2. Stress state a)Oy, Oyz, Oxy=0 =no stress in y-direction ZZ = only significant stresses are ox and o Paul A Lagace @2001 Unit 13-4MIT - 16.20 Fall, 2002 Figure 13.1 General Geometry of a Beam a) long & thin ⇒ l >> b, h b) loading is in z-direction c) loading passes through “shear center” ⇒ no torsion/twist (we’ll define this term later and relax this constraint.) d) cross-section can vary along x 2. Stress state a) σyy, σyz, σxy = 0 ⇒ no stress in y-direction b) σxx >> σzz σxz >> σzz ⇒ only significant stresses are σxx and σxz • Paul A. Lagace © 2001 Unit 13 - 4