Question

as shown in Fig.2. The lengths of two 2. Three bars form an isosceles right triangle, right angle sides are L, which is 1000 mm. The cross section area of the three bars are 1000 mm2. Young's modulus of bars are E-21x10 N/ mnt Please find the global stiffness matrix of these bar element system. If the numbering of the bar nodes changes, does the global stiffness matrix change? (15 %) y 1 (3) (1) (2) 3 2 Fig.2 Bar triangle

Answer 1

1000 Ym 0-SITRRS EE yomg's modulus E-Shaim P tooD ynm A P- Load AC K &2 Section A-AYRA thigimal hengh 7 thamge Gilobal Stilfnet har 2 Lengn of bar K 414 Ym 1K AE L. LT Gar 3 aohen lompared to the other vo Arars 1000 x 2. 10 AE K 2.17 10 2 OOD D00 x 2. X K UG tVre above dis cussion he Monding nodes ave thanged mati wil thange gloral titness the