Midterm

Question 1

Manufacturing

Answer 1

Converting raw materials into products

Question 2

Concurrent Engineering

Answer 2

Simultaneous engineering, integrates design and manufacturing optimizing all elements involved

Question 3

Design for manufacture, Assembly, disassembly, and service

Answer 3

Manufactured economically with ease; assembled with speed, ease, and minimal cost; Disassembly with relative ease, little time; Individual parts are easy to reach and service

Question 4

Green Design

Answer 4

Design for recycle (DFR), Design for environment (DFE)

Question 5

Sustainable manufacturing

Answer 5

reduce waste of materials, proper handling and disposal of waste, improve waste treatment and RRR.

Question 6

Product life cycle

Answer 6

Product development, market intro, growth, maturation, decline

Question 7

lean production

Answer 7

Efficiency of machinery and equipment while improving quality,number of personnel involved in operation

Question 8

Goal of Lean Production

Answer 8

Reducing all types of waste from its operation and dealing with prob;ems asap

Question 9

Agile Manufacturing

Answer 9

Flexibility in manufacturing to allow for adaptation for production variety, demand, and customer needs

Question 10

How agile manufacturing is achieved

Answer 10

Through reconfigurable machines, modular components, advanced computer hardware and software.

Question 11

Outsourcing

Answer 11

Taking internal company activities and paying outside firm to perform them

Question 12

Hardness is proportional to ; and is not ____ material property

Answer 12

yield strength; intrinsic

Question 13

Ductile materials undergo___ before fracture

Answer 13

large plastic deformation

Question 14

Brittle materials show ___ plastic deformation

Answer 14

little or no

Question 15

Ductile mat yeilds when

Answer 15

max shear stress exceeds yield shear stress

Question 16

Brittle mat ruptures when

Answer 16

max tensile normal stress exceeds UTStress

Question 17

Tension test determines

Answer 17

strength, ductility, toughness, elastic modulous, and strain hardening capability

Question 18

Compression test gives info useful for

Answer 18

estimating forces and power requirements in these processes

Question 19

Bauschinger Effect

Answer 19

By applying tensile or compressive load beyond the elastic limit for compression or for tension, respectively, is reduced considerably and the more the load exceeds the elastic limit, the greater is the reduction

Question 20

Residual stress

Answer 20

Stresses that remain in part after it has been formed and all external forces are removed

Question 21

Fatigue caused by

Answer 21

stresses much smaller than the tensile strength

Question 22

Fatigue failure starts from a

Answer 22

microscopic initial defect, such as micro cracks, irregular grain boundaries, and impurity inclusions

Question 23

Crystal defect types

Answer 23

point, linear, planar, volume/bulk

Question 24

Edge dislocation

Answer 24

linear defect at the edge of extra plane of atoms

Question 25

screw dislocation

Answer 25

a helical defect in a three dimensional lattice of atoms. Atomic planes for spiral ramp

Question 26

Dislocations help to explain

Answer 26

why the actual strength of mat is much lower that that predicted by atomic theory

Question 27

Strain hardening

Answer 27

increase of overall strength due to dislocation entanglement and impediments by barriers (GB, impurities, inclusions, etc)

Question 28

slip band consists of

Answer 28

a number of slip planes

Question 29

Grains

Answer 29

smallest unit in a metal that can be observed by a light microscope

Question 30

Large grains

Answer 30

low strength, low hardness, high ductility; rougher surface finish