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Introduction to Biomechanics-HW5

# Introduction to Biomechanics-HW5 - nd i n g def l ecti on...

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Introduction to Biomechanics Homework 5 1. A steel rod is 2.2 m long and must not stretch more than l.2 mm when a 8.5-kN load is applied to it. Knowing that E = 200 GPa, determine (a) the smallest diameter rod that should be used, (b) the corresponding normal stress caused by the load. 2. A 4 .8 -ft-Ion g s t ee l w i re o f 1/4 -in.-diameter ste e l wire i s s ubj e cted t o a 750-lb t ensil e load. Knowing that E = 29 X 10 6 psi, determine ( a ) the elon gation o f th e wire, (b) th e corresponding no r mal stress. 3. Th e 4 -mm- d i a m ete r c a b le B C i s m a d e of a s t e e l w i t h E = 2 00 G P a . Kn o win g t h at th e m a x imum s tr es s in th e c abl e mu s t n o t ex ceed 1 9 0 M Pa a nd th a t th e e l o n ga ti o n o f the ca bl e mu s t n o t e x ce ed 6 mm , f ind th e m ax imum l o ad P th a t ca n b e a pp l ied a s s h ow n. 4. Bot h p o rt i o n s of th e r o d A B C a r e m a d e of a n a lu mi num fo r which E= 70 GPa. K n ow in g th at t h e ma g nitu de o f P is 4 kN, d e term i ne ( a ) t h e va l u e of Q so that t he d e f l ec t i o n at A i s z ero, (b) t h e correspo

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Unformatted text preview: nd i n g def l ecti on of B . 5. T h e l en g t h of t h e ass embl y d ecreas e s by 0. 1 5 r nm w h e n an a x i a l force is a pp li e d b y m ea n s o f ri g i d e nd p l a tes. Det e rmi n e ( a ) th e m a g ni t ud e o f the applied for ce , (b ) th e c o r r es pondi ng st r e ss i n t h e s te el co r e . 6. A f a b ri c u s ed in ai r-i n f l a t e d s tr u ct ur es i s s u bje c t e d to a b ia x i al loading t h at r e s ult s in n or m a l st r e s s e s s x = 12 0 M P a a nd s z = 1 6 0 MP a . Know i ng th at th e prope rtie s of th e fa b ric ca n be a pp ro x i m a t e d a s E = 87 GP a and n = 0. 3 4 , d e term i ne th e c han g e i n l en g th of (a) s ide A B , ( b ) s i d e B C, (c ) di ag o n a l AC . 0.4 m 0.5 m...
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