Question

100 m В D Fig. 22

If u cant do part B at least do part A

Answer 1

A) Material used for the member AB is Alloy Stelel C40 with yield stress of 330MPa and Brinell Hardnes of 217HB

Having a tensile strength of 630MPa .The alloy steel is used in making of the high weight carrying cranes as it is highly resistant to corrosion and have high strength to weight ratio with an elongation of 8-25%.

(DATA FROM PSG DESIGN DATA BOOK PAGE NO-1.9)

CARBON STEELS WITH SPECIFIED CHEMICAL COMPOSITION AND RELATED MECHANICAL PROPERTIES DESIGN DATA - PSG TECH Designation %C % Mn Tensile strength kgf/mm % Minimum Elongation (Gauge length 5.65 Va* Cylindrical test piece) Yield stress kgf/mm Izod impact Brinell value min. hardness (If specified) (If specified) kgf m HB 27 20 0.50 Max. 0.30 - 0.60 26 21 5.5 26 22 5.5 C07 C 10+ C 141 C 15 C 15 Mn 75 C 20 C 25 0.40 - 0.70 0.30 - 0.60 0.60 - 0.90 137 137 25 24 25 25 163 24 26 156 170 32 - 40 34 - 43 37 - 45 37 - 49 42 - 50 44 - 52 44 - 54 47 - 57 50 - 60 52 - 62 55 - 65 58 - 68 23 28 0.60 - 0.90 0.30 - 0.60 0.60 - 0.90 0.60 - 0.90 0.30 - 0.60 22 28 207 21 30 5.5 0.12 Max. 0.15 Max. 0.10 - 0.18 0.20 Мах. 0.10 - 0.20 0.15 - 0.25 0.20 - 0.30 0.20 - 0.30 0.25 -0.35 0.30 - 0.40 0.30 - 0.40 0.35 - 0.45 0.40 - 0.50 0.45 - 0.55 0.45 - 0.55 0.50 - 0.60 0.55 - 0.65 0.60 - 0.70 179 20 31 - 187 223 0.60 - 0.90 20 32 5.5 18 33 4.1 C 25 Mn 75 C 30 C 35 C 35 Mn 75 @ C 40 C 45 C 50 e C 50 Mn 1 C 55 Mn 75 C 60 C 65 0.60 - 0.90 0.60 - 0.90 217 15 36 4.1 229 63 - 71 66 - 78 0.60 - 0.90 13 38 241 255 11 1.10 - 1.40 0.60 - 0.90 40 13 40 72 Min. 72 Min. 75 Min. 75 Min. 11 42 0.50 - 0.80 0.50 - 0.80 265 255 255 10 43 + Steels for case Carburizing Steels for Hardening and Tempering * a, area of cross section Mn 75: Average content of Mn is 0.75% 1 kgf - 10 N anned with CamScanner Properties given are for bars and forgings in the oil hardened and tempered condition

(USE THE TABLE ABOVE FOR YIELD STRESS DATA FOR C40)

Choosing a Spors Motorbike -BAJAJ PULSAR 150 CC WITH A WEIGHT OF 144KG.

ASSUMING FACTOR OF SAFETY NF=3

According to maximum principle stress theory (Rankines Theory)

A. 0.15 = 43.16d 2 bxd. 0:15 X 100 Ed. 43.16 da - 0.34.15m AB is cross-section of the Member loomx 0.35m.

Application of Rankines Theory:

The Rankines Theory ignores the possibility of failure of due to shear stress .The ductile materials are relatively weaker in shear.Hence,this theory is not useful for ductile materials.However, for the brittle materials which are strong in shear ,this theory is used.

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A. 0.15 = 43.16d 2 bxd. 0:15 X 100 Ed. 43.16 da - 0.34.15m AB is cross-section of the Member loomx 0.35m.