Design T4

studied byStudied by 30 people
5.0(3)
get a hint
hint

Strain

1 / 106

Tags and Description

107 Terms

1

Strain

The response of a material due to stress, defined as the change in length divided by the original length

New cards
2

Stress

A force on a material divided by the cross sectional area of the material

New cards
3

Stiffness

The resistance of and elastic body to deflection by an applied force

New cards
4

Super alloy

Alloy the exhibits exceptional mechanical properties, resistance to thermal creep deformation, good surface stability, and resistance to errosion

New cards
5

Synthetic fibers

Fibers made from man made materials, spun into threats; the joining of monomers into polymers through polymerization

New cards
6

Tempering

Heat treating process that increases the toughness of iron based metals by heating the metal and allowing it to cool in air. This can increase ductility and decrease brittleness

New cards
7

Knots

Imperfections in timber, caused by the growth of branches in the tree that reduces its strength

New cards
8

Lacemaking

A method for creating a decorative fabric that is woven into symmetrical patterns and figures

New cards
9

Laminated boards

Sheets of material made from layers of veneers (plywood)

New cards
10

Laminated object manufacture (LOM)

A rapid prototyping system that creates a 3D product by converting it into slices, cutting the slices, and joining the slices

New cards
11

Lamination

Covering the surface of a material with a thin sheet of another material typically for protection, preservation, or aesthetic reasons

New cards
12

Load Capacity (Robots)

The weight a robot can manipulate

New cards
13

Machine to machine (M2M)

Wired or wireless communication between similar devices

New cards
14

Magneto-rheostatic

The smart property relates to a fluid that can undergo a dramatic change in viscosity when exposed to a magnetic field

New cards
15

Man-made timber

Also known as engineered wood or composite wood, these are wood products that are made by binding or fixing strands, particles of fibers, veneers of boards of wood together with adhesives or other fixing methods to create a composite materials. Typical examples include MDF, plywood and chipboard

New cards
16

Twisting

A distortion in which the 2 ends of a materiel do not lie in the same plane

New cards
17

Mass

Relates to the amount of matter in a given volume

New cards
18

Mass customization

A sophisticated CIM system that manufactures products to individual customer orders. The benefits of economy of scale are gained whether the order is for a single item or for thousands

New cards
19

Mass production

The production of large amounts of standardized products on production lines, permitting a very high rate of production per worker

New cards
20

Material selection charts

A chart used to identify appropriate materials based on the desired properties

New cards
21

Mechanical properties

Properties of a material that involve the relationship between stress and strain or a reaction to an applied force

New cards
22

Mechanized production

A volume production involving machines controlled by humans

New cards
23

Multi task robots

A type of robot that can preform more than one task in a manufacturing environment

New cards
24

Automated production

A volume production process involving machines controlled by computers.

New cards
25

Bio-compatibility

The product ensures the continued health of a biological environment.

New cards
26

Brittle

Breaks into numerous sharp shards

New cards
27

Design for disassembly

Designing a product so that when it becomes obsolete it can easily and economically be taken apart, the components reused or repaired, and the materials recycled.

New cards
28

Design for Materials

Designing in relation to materials during processing

New cards
29

Design for process

Designing to enable the product to be manufactured using a specific manufacturing process, for example, injection molding.

New cards
30

Dry rot

When timber is subject to decay and attacked by fungus

New cards
31

Ductility

The ability of a material to be drawn or extruded into a wire or other extended shape

New cards
32

Elasticity

The extent to which a material will return to its original shape after being deformed

New cards
33

Electrical insulator

Reduces transmission of electric charge

New cards
34

Electrical resistivity

The measure of a material's ability to conduct electricity. A material with low resistivity will conduct electricity well.

New cards
35

Electro-Rheostatic

This smart property relates to a fluid that can undergo a dramatic change in its viscosity when exposed to an electric field.

New cards
36

Equilibrium Moisture Content (EMC)

EMC is at which the moisture content of wood achieves an equilibrium with the environment which can be affected by humidity and temperature.

New cards
37

Felting

A method for converting yarn into fabric by matting the fibers together

New cards
38

First Generation Robots

A simple mechanical arm that has ability to make precise motions at high speed. They need constant supervision by a human operator.

New cards
39

Free moisture

The moisture within timber that is contained within the cell cavities and inter cellular spaces.

New cards
40

Glass

A hard, brittle and typically transparent amorphous solid made by rapidly cooling a fusion of sand, soda, and lime.

New cards
41

Grain Size (metals)

Metals are crystalline structures comprised of individual grains. The grain size can vary and be determined by heat treatment, particularly how quickly a metal is cooled. Quick cooling results in small grains, slow cooling results in large against. Grain size in metals can affect the density, tensile strength and flexibility.

New cards
42

Design for Manufacture

Designers design specifically for optimum use of existing manufacturing capability

New cards
43

Craft production

A small-scale production process centered on manual skills.

New cards
44

Design for assembly

Designing taking account of assembly at various level, for example, component to component, components into sub-assemblies and sub-assemblies into complete products.

New cards
45

Creosote

A material that penetrates the timber fibers protecting the integrity of the wood from attack from borer, wood lice, and fugal attack.

New cards
46

Density

The mass per unit volume of a material. Its importance is in portability in terms of a product's weight and size. Design contexts include, pre-packaged food (instant noodles) is sold by weight and volume, packaging foams.

New cards
47

cupping

A warp across the width of the face of wood, in which the edges are higher or lower than the centre

New cards
48

Continuous flow

A production method used to manufacture, produce or process materials without interruption.

New cards
49

Creep

The slow, permanent deformation of a solid material under the influence of a mechanical stress.

New cards
50

Computer numerical control (CNC)

Refers specifically to the computer control of machines for the purpose of manufacturing complex parts in metals and other materials. Machines are controlled by a program commonly called a "G code". Each code is assigned to a particular operation or process. The codes control X, Y, Z movements and feed speeds.

New cards
51

Compressive strength

The ability of a material to withstand being pushed or squashed

New cards
52

Composite

a material comprised of two or more constituent materials that have different properties

New cards
53

Chemically inert

Lack of re-activity with other materials

New cards
54

Bowing

A warp along the length of the face of the wood

New cards
55

Batch production

Limited volume production (a set number of items to be produced)

New cards
56

Tensile strength

Ability of a materials to withstand pulling force

New cards
57

Assembly line production

A volume production process where products and components are moved continuously along a conveyor. As the product goes from one work station to another, components are added until the final product is assembled.

New cards
58

Thermal expansion

The measure of the degree of increase in dimensions when an object is heated. This can be measured by an increase in length, area, or volume. Can be found in fractional increase per kelvin

New cards
59

Work envelope

A fixed 3D space where work activities take place, considering clearance and reach.

New cards
60

Work hardening

Also known as strain hardening or cold working, this is the process of toughening a metal through plastic deformation.

New cards
61

Subtracting/Wasting techniques

Manufacturing technique that cuts away material to create a component

New cards
62

Yarn

A long continuous length of interlocked synthetic or natural fibres

New cards
63

Young's Modulus

A measure of the stiffness of an elastic material and defined by stress/strain

New cards
64

Thermo-electricity

Smart material that when heated can produce an electric current. Comprised of 2 dissimilar conductors

New cards
65

Wood treatment

Treatment of wood can involve using solutions, which make the wood poisonous to insects, fungus, and marine borers as well as protecting it from the weather.

New cards
66

Volume

The quantity of a 3 dimensional object enclosed by a boundary. The space that an object takes up

New cards
67

Warping

A distortion in wood caused by uneven drying, resulting in material bending or twisting

New cards
68

Third gen. robots

Autonomous robots that can operate without supervision from people. Own central control unit. Swarms of small units fit in this catagory

New cards
69

Transparency

Ability to allow light to pass through it with minimal distortion

New cards
70

Toughness

Ability to resist the prorogation of cracks

New cards
71

Thermosetting plastic

A plastic that when it takes its shape will permanently stay in that shape

New cards
72

Wood recycling

Wood recycling is the process of turning waste timber into usable products. Recycling timber is a practice that was popularized in the early 1990s as issues such as deforestation and climate change prompted both timber suppliers and consumers to turn to a more sustainable timber source.

New cards
73

Thermoplastic

A plastic that when heated can be reshaped and reformed

New cards
74

Thermal condutivity

Measurement of how fast heat will transfer through material with a given temperature

New cards
75

Weight

Relies on mass and gravitational forces to provide measurable value. Weight is technically measure as a force, which is the Newton, i.e. a mass of 1 Kg is equivalent to 9.8 Newton [on earth].

New cards
76

Additive Techniques

Manufacturing techniques that add material in order to create it

New cards
77

Alloy

A mixture that contains at least two metals. This can be a mixture of metals or a mixture of metals and non-metals.

New cards
78

Kiln seasoning

Thermally insulated chamber, an oven, which produces temperatures sufficient to complete some process, such as hardening, drying, or chemical changes

New cards
79

Knitting

A method for converting yarn into fabric by creating consecutive rows of interlocking loops of yarn

New cards
80

Piezoelectricity

A property of a smart material. A piezoelectric material gives off a small electrical discharge when deformed.

New cards
81

Weaving

The act of forming a sheet like material by interlacing long threads passing in one direction with other at a right angle to them.

New cards
82

Aesthetic charateristics

Aspects of a product that relate to tastes, texture, smell and appearance

New cards
83

Air-drying

Air-drying places that stacks sawed timber in the open or in large shed hence there is little control over the drying process. Will warp the wood.

New cards
84

Physical properties

Any property that is measurable that describes a state of materials, for example, mass, weight, volume and density. These properties tend to be the characteristic of materials that can be identified through non-destructive testing (although some deformation is required to test hardness).

New cards
85

Plasticity

The ability of a material to be changed in shape permanently

New cards
86

Reforestation

The process of restoring tree cover to areas where woodlands or forest once existed. If this area never returns to its original state of vegetative cover the destructive process is called deforestation.

New cards
87

Seasoning

Seasoning is the commercial drying of timber which reduces the moisture content of wood.

New cards
88

Second generation robots

Robots that are equipped with sensors that can provide information about their surroundings. They can synchronize with each other and do not require constant supervision by a human; however, they are controlled by an external control unit.

New cards
89

Shape memory alloys

Shape memory alloys are metals that when deformed, can spring back into its original shape once released.

New cards
90

Shaping technigues

Manufacturing methods for modifying the shape of a material.

New cards
91

Single task robots

Robots that can perform one task only.

New cards
92

Smart materials

Materials that have been designed to have one or more properties that can be modified when subject to an external stimuli in a way that the output can be controlled.

New cards
93

Softwood

The wood from a coniferous (evergreen) tree.

New cards
94

Pultrision

A continuous manufacturing process used to create composite materials that have a constant cross-section. Reinforcing fibres are saturated with a liquid polymer resin and then pulled through a heated die to form a part.

New cards
95

Natural Fibres

Materials produced by plants or animals that can be spun into a thread, rope or filament

New cards
96

Non-toxic

Absence of toxic breakdown products/lack of reactivity.

New cards
97

One-off production

An individual (often craft-produced) article or a prototype for larger scale production.

New cards
98

Oxidation resistance

A property of a metal that means that it does not readily react with oxygen and degrade.

New cards
99

Paper-based rapid prototyping

Often the first step in a rapid prototyping process, paper prototyping is widely used in UCD for designing and testing interfaces.

New cards
100

Photochromicity

A property of a smart material. A photochromic material changes colour in response to an increase in light. When the light source is removed, it returns to its original colour.

New cards

Explore top notes

note Note
studied byStudied by 3 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 12 people
Updated ... ago
5.0 Stars(2)
note Note
studied byStudied by 6 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 10 people
Updated ... ago
4.0 Stars(106)
note Note
studied byStudied by 13 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 9 people
Updated ... ago
5.0 Stars(1)
note Note
studied byStudied by 30 people
Updated ... ago
5.0 Stars(1)

Explore top flashcards

flashcards Flashcard32 terms
studied byStudied by 21 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard276 terms
studied byStudied by 6 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard46 terms
studied byStudied by 15 people
Updated ... ago
5.0 Stars(2)
flashcards Flashcard49 terms
studied byStudied by 20 people
Updated ... ago
5.0 Stars(2)
flashcards Flashcard37 terms
studied byStudied by 4 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard71 terms
studied byStudied by 6 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard115 terms
studied byStudied by 19 people
Updated ... ago
5.0 Stars(1)
flashcards Flashcard85 terms
studied byStudied by 11 people
Updated ... ago
4.0 Stars(1)