Mechanical Behaviour of Engineering Materials - Metals, Ceramics, Polymers and Composites 2010 Part 10 pptx

... bending of several polymers at a temper- ature of 20℃ and a loading frequency of 10 Hz (polyamide: 15 Hz, after [41]) 50 200 10 100 10 0 10 1 10 2 10 3 10 4 10 5 10 6 10 7 N f σ A MPa unreinforced 10 ... R m < 1 100 MPa ≈ 620 MPa for R m ≥ 1 100 MPa 200 300 400 500 600 700 10 0 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 N f σ A MPa 20...

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... expansion of the two materials, the matrix is stressed compressively near the particles, impeding crack propa- 262 8 Mechanical behaviour of polymers T degree of polymerisation 10 7 10 6 10 5 10 4 10 3 10 2 10 1 T m T g viscous ... the melting of 266 8 Mechanical behaviour of polymers 0 1 2 3 4 5 "/% ¾/MPa 50 0 10 20 30 40 25 0 5 10 15 20 12 0 2...

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... creep Nabarro- Herring creep (a) Aluminium Coble creep T/T m T/°C 10 –5 10 –4 10 –3 10 –6 10 –7 10 –8 10 –2 10 –1 0.0 0.2 0.4 0.6 0.8 1.0 200 0100 00 3000 ¾/G 10 3 10 2 10 1 10 0 10 –1 10 –2 10 –3 ¾/MPa theoretic ... service stress 398 11 Creep T/T m T/°C 10 –5 10 –4 10 –3 10 –6 10 –7 10 –8 10 –2 10 –1 0.0 0.2 0.4 0.6 0.8 1.0 4002000–200 600 ¾/G...

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... have a cross-linking density, relative to dia- mond, of 10 −4 to 10 −3 , whereas the cross-linking density of duromers is much higher, with values of 10 −2 to 10 −1 . Elastomers and duromers ... 41 0 50 100 150 200 0 20 40 60 80 100 % NiCu E GPa Fig. 2.7. Dependence of Young’s modulus on the amount of alloyed nickel in cop- p er [33] In table 2.1, a survey of the You...

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... 4.2. The shape and size of the 146 5 Fracture mechanics 0.01 0.1 1 10 100 100 0 0.1 1 10 100 100 0 100 00 polymer foams ice polymers metals porous ceramics ingineering ceramics composites crack ... MP p m ¾ limit / MPa 10 §0 10 ¡1 10 +1 10 +2 10 ¡4 10 ¡3 10 ¡2 a c = / mm K Ic 2 ¼¾ limit 2 Fig. 5.11. Toughness-strength diagram after Ashby [7]. The failure...

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... nm σ 22 / MPa 100 −50 0 50 100 100 −50 0 50 100 100 −50 0 50 100 τ 12 / MPa x 1 / nm x 2 / nm τ 12 / MPa 100 −50 0 50 100 100 −50 0 50 100 100 −50 0 50 100 σ m ... 171 100 −50 0 50 100 100 −50 0 50 100 100 −50 0 50 100 σ 11 / MPa x 1 / nm x 2 / nm σ 11 / MPa 100 −50 0 50 100 100 −50 0 50 100 100...

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... 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...

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... small interfacial 270 8 Mechanical b ehaviour of polymers 0.00 0.05 0 .10 0.15 0.20 0.25 10 −6 10 −5 10 −4 10 −3 10 −2 10 −1 10 0 · ε/s −1 σ/T MPa/K 21.5 °C 40 °C 60 °C 80 °C 100 °C 120 °C 140 °C Fig. ... chain molecules is larger and enables 9 Mechanical behaviour of fibre reinforced composites In composites, different materials are combined to exploit favour...

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... 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-ph...

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