Please answer all true/false questions 10. Materials which undergo plastic deformation prior to 11. A true...
Q21. Which one of the following statements about the ductility of metals is TRUE? A High ductility occurs in brittle materials B Ductility is the amount of deformation at the 0.2% proof stress C Ductility can be measured as % reduction in area from broken tensile samples D Ductility is deformation in the elastic region E Ductility is the change between upper and lower yield point in steels Q22. Which one of the following statements is TRUE about Charpy impact...
For the following 10 questions, indicate if the statement is true or false by circling T or F. Provide any explanation and assumptions if needed. (1) T or F: No shear stress can occur on the planes carrying max and min normal stress. 2) T or F: If a material element is in plane stress, two normal stress components are always equal to each other if this is the plane of maximum shear stress. (3) T or F: No normal...
7) Which of the following is true? O The linear coefficient of thermal expansion is unique for each material (material property) O The displacement due to temperature is linearly related to the original length O Stress concentration factors relate the maximum stress to the average stress O Sharp corners should be avoided because they create stress concentrations. O All the above are true 8) Which of the following statements are true? O A simply supported beam which supports a load...
1. Select all true statements about plastic machining/ fabrication. A. metal inserts are chemically bonded in plastic parts B. large flat surfaces are generally preferred due to plastic's elastic modulus C. curing time is determined from the thinnest wall section D. raised letters on a plastic part incur less mold expense than depressed letters E. parting lines should be placed along plastic part corners and edges 2. Select benefits of fabricating with plastics, ceramics, and composites. A. one process can...