Question

Report Part B. CALCULATE the modulus of the rubber sheet at 300N (using data from Table 1), by E a/ty (at 300 N)MPa Table 2 Measurements and stresses at various positions away from the hole on the rubber sheet. Position of Measurement Item 1-1* 2-2* 3-3* 4-4 5-5 6-6 7-7 Initial distance (ye) between points, mm (at 0 N) 20 20 20 20 20 20 20 between points, mm (at 300 N) 22.5 | 22 | 22 | 2212盈 strain o at ON stress MPa 0.129 σ.050 0-025 POSITION OF MEASUREMENT

Answer 1

Solution: Modulus of elasticity, E stress modulus of elasticity_ strain Given data, Position 1-1* 2-2* 3-3* 4-4* 5-5* Stress 0.226 0.181 0.181 0.181 0.09 Strain (at 300 0.125 N) 0.1 0.1 0.1 0.05 Thus, Modulus of elasticity is equals to ration of stress to the strain, Hence, Modulus, E 1.8 1.808 1.81 1.81 1.81 From all the modulus, E values above rounding off to near decimal given value1.8 Thus Modulus of the rubber sheet (at 300N) 1.8 Mpa