Question

Do Parts A. B. and C please

n Review Part A A uniform edge load of w = 550 lb/in and W2 = 300 lb/in is applied to the polystyrene specimen. En = 597(10") psi and y = 0.25 (Figure 1) If the specimen is originally square and has dimensions of a = 4 in., b = 1 in, and a thickness of t = 0.25 in., determine its new dimension a' after the load is applied Express your answer to six significant figures and include appropriate units. OCH HÅR OO? d' = 4.0127 in O You have already submitted this answer. Enter a new answer No credit lost. Try again. Submit Previous Answers Request Answer Part B Determine its new dimension W after the load is applied. Express your answer to six significant figures and include appropriate units. Figure < 1 of 1 > O 2 ? MI HÅR B'= 1.00108 in Submit Previous Answers Request Answer * Incorrect; Try Again; 5 attempts remaining Part determine its new dimension t' after the load is applied.

Answer 1

Given dal w,= 550 eblin W2= 300 eblin Ep= 597x103 es linz (or) Psi Up=0.25 a=4in, b= lin, t=0.25 in WzK a Wir 550xa 550x 4 = 2200 lb - Oolt W2 = 300x b = 300xl 300 lb ОУСЕ stress in a direction (on) = 1 .. Gaz 2200 - 2200 eb linz 4x0.25 ng 10.25 sy. 52=0 Wz = 300 - 1200 et line E there is no load in z-direction ] Now Eu= Strain in a direction = b Ex= [su- ocoy tozl] - Sam [ 2200- 0.25% (1200+0) 597x1000 = I x 1900 = 0.0031826 597x1000 Ey = [ty-u[out oz]

[icos - 025*21007] *650 = 0.0010888 597x1200 st = {z = ₃ [oz offentfy)] 0 - 0 25 x 22oo + L] ) 597x103 L 850 = -0.0014238 - - - 597x10 Ens Bb - baba 0.0031826 = 0.0031826 Tb!= 1.0031826 in Q = O : 0.0010888 Ey = 20 0.0010888 → 6-4 = (a = 4.0043552 in) -- t-0-2 - - 0 ob\ 423% 0.25 t = 0.2496441 in new dimensions Where al blat after load are the applied.