Question

PROBLEM 2.75 The plastic block shown is bonded to a rigid support and to a vertical plate to which a 240-kN load P is applied. Knowing that for the plastic used G = 1050 MPa, determine the deflection of the plate. Dimensions in mm SOLUTION A = (80)(120) = 9.6 · 10^3 mm^2 = 9.6 · 10^-3 m^2 P = 240 · 10^3 N ? = P / A = (240 · 10^3) / (9.6 · 10^3) = 25 · 10^6 Pa G = 1050 · 10^6 Pa ? = ? / G = (25 · 10^6) / (1050 · 10^6) = 23.810 · 10^-3 h = 50 mm = 0.050 m ? = h? = (0.050)(23.310 · 10^-3) = 1.190 · 10^-3 m 1.091 mm

          PROBLEM 2.75
The plastic block shown is bonded to a rigid support and to a vertical plate to which a 240-kN load P is applied. Knowing that for the plastic used G = 1050 MPa, determine the deflection of the plate.
Dimensions in mm
SOLUTION
A = (80)(120) = 9.6 · 10^3 mm^2 = 9.6 · 10^-3 m^2
P = 240 · 10^3 N
? = P / A = (240 · 10^3) / (9.6 · 10^3) = 25 · 10^6 Pa
G = 1050 · 10^6 Pa
? = ? / G = (25 · 10^6) / (1050 · 10^6) = 23.810 · 10^-3
h = 50 mm = 0.050 m
? = h? = (0.050)(23.310 · 10^-3)
= 1.190 · 10^-3 m 1.091 mm

PROBLEM 2.75
The plastic block shown is bonded to a rigid support and to a vertical plate to which a 240-kN load P is applied. Knowing that for the plastic used G = 1050 MPa, determine the deflection of the plate.
Dimensions in mm
SOLUTION
A = (80)(120) = 9.6 · 10^3 mm^2 = 9.6 · 10^-3 m^2
P = 240 · 10^3 N
? = P / A = (240 · 10^3) / (9.6 · 10^3) = 25 · 10^6 Pa
G = 1050 · 10^6 Pa
? = ? / G = (25 · 10^6) / (1050 · 10^6) = 23.810 · 10^-3
h = 50 mm = 0.050 m
? = h? = (0.050)(23.310 · 10^-3)
= 1.190 · 10^-3 m 1.091 mm

Added by Ibrahim A.

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