Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 11 pptx
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 11 pptx
... Creep deformation
In section 8.2.1, the time-dependent behaviour of polymers was described
using spring -and- dashpot models.
a) Sketch a spring -and- dashpot model suitable to describe creep deformation!
b) ... 49
21 CrMoV 5-1 1 410 349 212 92
austenitic steels
X 5 CrNi 1 8-1 0 127 74 30
X 10 CrNiNb 1 8-9 300 205 131 55 18
X 5 CrNiMo 1 7-1 2-2 145 52 23
nickel-base superalloy...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 7 pptx
... Time-dep endent deformation of polymers 265
(a) Kelvin model (b) Four-parameter model
Fig. 8.7. Mechanical models of viscoelastic and viscoplastic materials, built as
systems containing spring and ... in thermal expansion of the two materials,
the matrix is stressed compressively near the particles, impeding crack propa-
262 8 Mechanical behaviour of polymers
T
degree...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 10 pptx
... glass
40 % C
Fig. 10.25. Comparison of the S-N curves of unreinforced as well as glass- and
carb on-reinforced polysul fone (simplified plot after [29])
S-N curves of fibre composites
According to section ... self-diffusion
is thus large, and the exponential term in equation (11. 2) can reach the size
of that in a low-melting material only at higher temperatures. As shown in
table...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 2 doc
... material:
C
11
=
S
11
+ S
12
(S
11
− S
12
)(S
11
+ 2S
12
)
, (2.38a)
C
12
= −
S
12
(S
11
− S
12
)(S
11
+ 2S
12
)
, (2.38b)
C
44
=
1
S
44
(2.38c)
and
S
11
=
C
11
+ C
12
(C
11
− C
12
)(C
11
+ 2C
12
)
, ... deformation. Time-dep e nde nt plastic deformation will be de-
noted as viscoplasticity or creep. This will be discussed in chapter 11 for the
case of metals and...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 4 docx
... crack-growth resistance or crack-extension resis-
tance K
IR
.
12
The crack-growth resistance initially increases in materials form-
ing a process zone, a behaviour frequently denoted R curve behaviour. ... not to depart too far out of the
region of smallest cross section. On the one hand, this is due to the smaller
stress level in the thicker parts of the specimen. On the other ha...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 5 doc
... plane
{0001} 112 0
1 3 3 Cd, Zn, Mg, Ti, Zr
{ 0110 } 2110
3 1 3 Ti, Zr
{ 0111 } 2110
6 1 6 Ti, Mg, Zr
{ 0112 } 2110
6 1 6 Zn
{112 2} 110 0
6 1 6 Ti
Burgers vector out of basal plane
{ 0110 } 2113
3 ... lattices.
Face-centred cubic crystal
The face-centred cubic crystal is close-packed (see section 1.2.2). Planes of
type {111 } and directions of the type 110 are cl...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 6 ppt
... elastically, and the stiffness increases. In the context of
fibre- and plate-shaped particles this will be discussed further in chapter 9.
The amount of load transfer depends strongly on the shape of the particles
and ... strength and the decrease in ductility for different states of
deformation of pure aluminium and an aluminium alloy.
One advantage of work hardening is th...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 8 pot
... Araneus diadematus and
8.4 Plastic behaviour 275
Table 8.1. Cross-linking density and Young’s modulus of different types of polymers
(cf. section 1.4.2)
type of material cross-linking density E/GPa
thermoplastics ... chain molecules is larger and enables
9
Mechanical behaviour of fibre reinforced
composites
In composites, different materials are combined to exploit fav...
Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 9 pot
... application of
ceramic matrix composites are cutting tools made of SiC-whisker reinforced
aluminium oxide for cutting of hard-to-machine materials, especially nickel-
base superalloys and hardened ... enamel.
314 9 Mechanical behaviour of fibre reinforced composites
¾
¾
¾
¾
Fig. 9 .11. Deformation of a fibre composite under compressive stress. The fibres
can b end in an in-p...
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