Question

weighing 48 kN and moving with a speed of 86 m/min has to be 1. A loaded narrow gauge car brought to the rest by a buffer consisting of three helical springs. In bringing the car to rest the spring undergoes a compression of 28 cm. The allowable shear stress is 0.32 GPa and the spring index is 9. Design a suitable spring. Take G as 80 x 10 kN/m2 Hint:() use kinetic energy equation (2) Energy absorbed by each spring 131

Answer 1

giein aceiyttf Apeed of Coa6 mmin8%6- Sateution Canprunion opr x 28 Cm 0.28m alowasl an abenfo 32 G Pe Apring irducg = Crenggabssvhed yspr^g. Lkinutic Qngjfaan 3 612 48-aoo- Xkxo 28 9.91 eaeh Aprng k x x* 4273J.4gxo 28 =| 9 67 0 6 N go load dm each Spriy W &N(d) T dd 2 -ND aowabl Mean sey 8 x |1967-04 X9 та? o32X1oJ oo29 276 m d 29. 276mm - feoid D springinduXd. = 9x23.276 Man dia moan du ot_cojlD 263.484mm - 26'3+91 Cm -8Gd 64крз -Gdl StHa KGd 6че3п. 64 kR 9.39 Т0 = 644235-I X0i 2634 843 " D^tTt^n, Na10,kz243JT4gMtm