Mechanical Engineering

2.2 Write the differential equation for the mechanical system shown in Fig. 2.44. State whether you think the system will eventually decay so it has no motion at all, given that there are nonzero initial conditions for both masses, and give a reason for your answer. Figure 2.44 Mechanical system for Problem 2.2 →X1 m1 11 T K₂ No friction No friction

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Create the U-Bracket part described in the chapter and then make an A-size drawing with dimensions. Include Front, Top, Right and ISO views using 3rd angle layout.

Create the U-Bracket part described in the chapter and then make an A-size drawing with dimensions. Include Front, Top, Right and ISO views using 3rd angle layout. EXPERT ANSWER

In manufacturing of composites: i) What are some of the advantages of the closed mold processes of PMCs relative to open mold processes? ii) What is the difference between the wet lay-up approach and the prepreg approach in hand lay-up? iii) What is autoclave?

Mechanical Engineering, Engineering / By wegoki

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What are some of the reasons why plastic shaping processes are important?

Mechanical Engineering, Engineering / By wegoki

EXPERT ANSWER The reasons include (1) many of the processes are net shape processes. (2) in general, less energy is employed than in metalworking processes. (3) lower temperatures are required to process plastics than metals or ceramics . (4) there is great flexibility in geometry and (5) painting and other finishing processes are generally not …

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13.3 Viscosity is an important property of a polymer melt in plastics shaping processes. Upon what parameters does viscosity depend? 13.5 What does viscoelasticity mean, when applied to a polymer melt? 13.18 An injection-molding machine is divided into two principal components; identify them. 13.31 What are some of the general considerations that product designers must keep in mind when designing components out of plastics? 16.1 Name some of the reasons for the commercial importance of powder metallurgy technology 16.2 What are some of the disadvantages of PM methods? 16.3 In the screening of powders for sizing, what is meant by the term mesh count? 16.10 What is the technical difference between mixing and blending in powder metallurgy?

Mechanical Engineering, Engineering / By wegoki

EXPERT ANSWER 13.3 Viscosity is defined as the ratio of imposed shear stress to the shear rate. Molten polymers are non-Newtonian fluids and hence their viscosity is depended on shear rate. As the shear rate increases, viscosity decreases due to the molecular alignments of long polymer chains. Higher the shear rate, less the viscosity and …

13.3 Viscosity is an important property of a polymer melt in plastics shaping processes. Upon what parameters does viscosity depend? 13.5 What does viscoelasticity mean, when applied to a polymer melt? 13.18 An injection-molding machine is divided into two principal components; identify them. 13.31 What are some of the general considerations that product designers must keep in mind when designing components out of plastics? 16.1 Name some of the reasons for the commercial importance of powder metallurgy technology 16.2 What are some of the disadvantages of PM methods? 16.3 In the screening of powders for sizing, what is meant by the term mesh count? 16.10 What is the technical difference between mixing and blending in powder metallurgy? Read More »

Annealed low-carbon steel has a flow curve with strength coefficient = 75,000 lb/in2 and strain-hardening exponent = 0.25. A tensile test specimen with gage length = 2.0 in is stretched to a length = 3.3 in. Determine the flow stress and average flow stress that the metal experienced during this deformation.

Mechanical Engineering, Engineering / By wegoki

Annealed low-carbon steel has a flow curve with strength coefficient = 75,000 lb/in2 and strain-hardening exponent = 0.25. A tensile test specimen with gage length = 2.0 in is stretched to a length = 3.3 in. Determine the flow stress and average flow stress that the metal experienced during this deformation. Flow stress = Enter …

Question 3 10 pts What is the difference between the physical shape of bulk deformation and sheet metalworking manufacturing processes? In bulk deformation, the work parts have a _ area-to-volume ratio, whereas in sheet metalworking, the – area-to-volume ratio is o low, high O high , low O high, high o low, low

Mechanical Engineering, Engineering / By wegoki

EXPERT ANSWER The key difference between bulk deformation and sheet metal forming is that in bulk deformation, the work parts have a low area to volume ratio whereas, in sheet metal forming, the area to volume ratio is high. OPTION A IS CORRECT