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Question 28 To combine the plane or 20 stress states as below. 6 MPa 12 MP 4 MPa 10 MPa + 8 MPa if the in-plane principle stresses for the stress state on the left are 10.94 MP and -6.94MP whicho the following slves the principle stresses for the combined stress state -10.94-12-22.94 MPa 6.94-1.06 MPa -10.94-12-22.94 MPa -6.94 +14.94 MPa -10.94+ 12 = 22.94 MPa 6.94 14.94 MPa Because the principle stresses from the stress states may not align they could not be directly added

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Que 28 Solution Principal stress which o no plane is the plane on shear stress o For left orientation element Calculated ar principal strees js tem (200) 2 Try on-ry tom (20p) 3.2x(-4) (10- (-6) 2 Op = -267565 opy = -13.280 1 en 3 76071° for Right side Element principal Streas at" 4'5° 135º. It means principal plane for Left & side stress elements mis-matched. o because the pro stress from the two Stress states may not align they could not be directly added. Anus

Page g Quezo, About the using superposition method to obtain Combined stress state from Several simple leads, which the following Statement is true ? to The stress level for each of the simple loads must be much lower than the materials yield strength Gy. (Ans ! Explanation If stress level is belone yield point stress it means material will fail & it is within elastic limit. if indlivieltcally locid satisfy this Criterion then combined stress will be belove yield & that would Stress for Component (Any Quezo Stresses normal & Shear are given in same plane direct super position can be applied Son Left element try = -4 Mpa CC w) on Righ element Toxyz = + 10 MACCCW) naf be sufe Net shear stress, Try -4+ 10 = 6 Counter - Clock-wise exy = 6 MPa 6MPaud colenter Clockte ise l'Ans #

Thue 31 using About the superfoosition methock to obtain Combined stress state from several simple locics, which of statement is true. the following very loading The saben position is applicable only to the sections close to the points where the forcer are applied. Exploration principle of super-positions derived from linear matria system. it tells a vector com be replace steny two or more than three Vector or viconversa, same pro is applicable to knore strees by super position method. by diin