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Case Study Of Bumper

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I. INTRODUCTION
Bumper is a one of important part of an automobile as safety point of view. It is introduce on front of an automobile so its necessary that it should be have good strength and stiffness to absorb the impact and the time of impact. The design of bumper being not simple because it’s having lots of constraints which have to be fulfilling at the time of design. Light in weight and cheap in cost with good impact strength are major factor which should be keep in mind at the time of design. Different automobile companies having different type of bumper design. However every time the main criteria being safety, cost and weight. Bumper is one amongst the necessary structures in rider cars. That we want to own careful style and producing …show more content…

Volume, V = 0.002731 m3, Mass, M = ρ*V = 1800*0.002731 = 4.916 Kg Modulus of Elasticity, E = 35000*107 N/m2, Resultant Stress Factor, Kr = 1.1
So, from equation 5, σ = Kr* √ (M* v2*E/ V) ----------------------- (Equation 5) σ = 1.1* √ (4.916 * 13.342*35*1010/0.002731) σ = 1.1*√1.12*1017 σ = 1.1*334838153.9 σ = 368321969.3 N/m2
Value of Max Stress at 13.34 m/s σ = 368.32 Mpa

For Velocity, v = 17.74 m/s, Density ρ = 1800 kg/m3 Volume, V = 0.002731 …show more content…

Mass, M = ρ*V = 1800*0.002731 = 4.916 Kg Modulus of Elasticity, E = 35000*107 N/m2, Resultant Stress Factor, Kr = 1.1
So, from equation 5, σ = Kr* √ (M* v2*E/ V) ---------------------------- (Equation 5) σ = 1.1* √ (4.916 * 17.742*35*1010/0.002731) σ = 1.1*√1.9827*1017 σ = 1.1*445279524 σ = 489807476.4 N/m2
Value of Max Stress at 17.74 m/s σ = 489.80 Mpa

3] Stress for GFRP Material
For Velocity, v = 13.34 m/s, Density ρ = 1200 kg/m3 Volume, V = 0.002731 m3, Mass, M = ρ*V = 1200*0.002731 = 3.277 Kg Modulus of Elasticity, E = 6000*107 N/m2, Resultant Stress Factor, Kr = 1.8
So, from equation 5, σ = Kr* √ (M* v2*E/ V) ----------------------------- (Equation 5) σ = 1.8* √ (3.277 * 13.342*60*109/0.002731) σ = 1.8*√1.28*1016 σ = 1.8*113193656.5 σ = 203748576.4 N/m2
Value of Max Stress at 13.34 m/s σ = 203.75 Mpa

For Velocity, v = 17.74 m/s, Density ρ = 1200 kg/m3 Volume, V = 0.002731 m3, Mass, M = ρ*V = 1200*0.002731 = 3.277 Kg Modulus of Elasticity, E = 60*109 N/m2, Resultant Stress Factor, Kr = 1.8
So, from equation 5, σ = Kr* √ (M* v2*E/ V) --------------------------------------- (Equation 5) σ = 1.8* √ (3.277 *

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