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# ps4p4 - Î 3 = 50 GPa-s and Ïƒ =-100 MPa 6",t = \$ t<...

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5 Problem 4: Grading: Total of 10 points. (a) +2 points Use the expression: " ( # ,t) = # E 1 + # E 2 1 \$ e \$ t / % ( ) + # & 3 t , where τ = η 2 /E 2 . Substitute E 1 = 500 MPa, E 2 = 100 MPa, η 2 = 500 MPa-s, η 3 = 50 GPa-s, and σ = 100 MPa. (b) +2 points The MathCad program below shows the resulting plot. c. (+2 points) Use the expression " ( # ,t) = 0 0 \$ t < 100s # E 1 + # E 2 1 % e % (t % 100 s)/ & ( ) + # 3 (t % 100s) t ( 100s ) * + , + where E 1 = 500 MPa, E 2 = 100 MPa, η 2 = 500 MPa-s,

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Unformatted text preview: Î· 3 = 50 GPa-s, and Ïƒ = -100 MPa. 6 " ( # ,t) = \$ t < 100s # E 1 + # E 2 1 % e % (t % 100s)/ & ( ) + # â€™ 3 (t % 100s) t ( 100s ) * + , + (d) +2 points Below shows a continuation of the MathCad program to produce this result (e) +2 points Below shows the continuation of the MathCad program to produce this result....
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