Table 16.4 Characteristics of Several Fiber-Reinforcement MaterialsTensile Strength[GPa (10° psi)]SpecificStrength(GPa)Modulusof Elasticity[GPa (10° psi)]SpecificModulus(GPa)MaterialSpecific GravityWhiskersGraphite2.2209.1700318(3)(100)Silicon nitride3.25–71.56–2.2350–380109–118(0.75–1.0)(50–55)Aluminum oxide4.010–202.5–5.0700–1500175–375(1–3)(100–220)Silicon carbide3.2206.25480150(3)(70)FibersAluminum oxide3.951.380.3537996(0.2)(55)Aramid (Kevlar 49)1.443.6–4.12.5–2.8513191(0.525–0.600)(19)Carbon“1.78–2.151.5–4.80.70–2.70228–724106–407(0.22-0.70)(32–100)E-glass2.583.451.3472.528.1(0.5)(10.5)Boron2.573.61.40400156(0.52)(60)Silicon carbide3.03.91.30400133(0.57)(60)UHMWPE (Spectra 900)0.972.62.68117121(0.38)(17)Metallic WiresHigh-strength steel7.92.390.3021026.6(0.35)(30)Molybdenum10.22.20.2232431.8(0.32)(47)Tungsten19.32.890.1540721.1(0.42)(59)"As explained in Section 13.9, because these fibers are composed of both graphitic and turbostratic forms of carbon,the term carbon instead of graphite is used to denote these fibers. 16.6 For a glass fiber-epoxy matrix combination, the● critical ratio of fiber length to fiber diameter is40. Using the data in Table 16.4, determine thefiber-matrix bond strength.

Given data, Fiber length to diameter ratio ie. K= L/d= 40

Answered: 16.6 For a glass fiber-epoxy matrix…

16.6 For a glass fiber-epoxy matrix combination, the critical ratio of fiber length to fiber diameter is 40. Using the data in Table 16.4, determine the fiber-matrix bond strength.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Concept explainers

Processing of Polymer Matrix Composites

The polymer matrix composite is described as a composite material that contains some polymer in the form of either fibers or powder. Polymer matrix composites are also known in short as PMC's.

Question

Table 16.4 Characteristics of Several Fiber-Reinforcement Materials
Tensile Strength
[GPa (10° psi)]
Specific
Strength
(GPa)
Modulus
of Elasticity
[GPa (10° psi)]
Specific
Modulus
(GPa)
Material
Specific Gravity
Whiskers
Graphite
2.2
20
9.1
700
318
(3)
(100)
Silicon nitride
3.2
5–7
1.56–2.2
350–380
109–118
(0.75–1.0)
(50–55)
Aluminum oxide
4.0
10–20
2.5–5.0
700–1500
175–375
(1–3)
(100–220)
Silicon carbide
3.2
20
6.25
480
150
(3)
(70)
Fibers
Aluminum oxide
3.95
1.38
0.35
379
96
(0.2)
(55)
Aramid (Kevlar 49)
1.44
3.6–4.1
2.5–2.85
131
91
(0.525–0.600)
(19)
Carbon“
1.78–2.15
1.5–4.8
0.70–2.70
228–724
106–407
(0.22-0.70)
(32–100)
E-glass
2.58
3.45
1.34
72.5
28.1
(0.5)
(10.5)
Boron
2.57
3.6
1.40
400
156
(0.52)
(60)
Silicon carbide
3.0
3.9
1.30
400
133
(0.57)
(60)
UHMWPE (Spectra 900)
0.97
2.6
2.68
117
121
(0.38)
(17)
Metallic Wires
High-strength steel
7.9
2.39
0.30
210
26.6
(0.35)
(30)
Molybdenum
10.2
2.2
0.22
324
31.8
(0.32)
(47)
Tungsten
19.3
2.89
0.15
407
21.1
(0.42)
(59)
"As explained in Section 13.9, because these fibers are composed of both graphitic and turbostratic forms of carbon,
the term carbon instead of graphite is used to denote these fibers.

16.6 For a glass fiber-epoxy matrix combination, the
● critical ratio of fiber length to fiber diameter is
40. Using the data in Table 16.4, determine the
fiber-matrix bond strength.

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