Glass stress-strain diagram

These stress-strain diagrams may be applied, for example, to the investigation of a rod of which has its total volume is glass fiber and half plastic. If the glass fibers are laid parallel to the axis of the rod, at any cross-section, half the total cross-sectional area is glass and half plastic. If the rod is stretched 0.5%, reference to the stress-strain diagrams... 

Figure 5.51 Typical stress-strain diagrams for aluminum oxide and glass. Reprinted, by permission, from W. CaUister, Materials Science and Engineering An Introduction, 5th ed., p. 410. Copyright 2000 by John Wiley Sons, Inc.

Figure 5.115 Stress-strain diagrams for lithiumaluminosilicate glass ceramic reinforced with 50% SiC fibers in various orientations. From Ceramic Microstructures, by W. E. Lee and W. M. Rainforth, p. 103. Copyright 1994 by William E. Lee and W. Mark Rainforth, with kind permission of Kluwer Academic Publishers.

Figure 6-42. The stress-strain diagrams for a glass fiber A and two resins B and C. Resin B is a hard, high-strength material, resin C of intermediate strength and hardness.

Typical stress-strain diagrams for brittle and ductile materials are shown in Fig, 2.7. For brittle materials such as cast iron, glass, some epoxy resins, etc., the stress strain diagram is linear from initial loading (point 0) nearly to rupture (point B) when average strains are measured. As will be discussed subsequently, stress and strain are point quantities if the correct mathematical definition of each is used. As a result, if the strain were actu-... 

Ductile materials often have a stress-strain diagram similar to that of mild steel shown in Fig. 2.8 and can be approximated by a linear elastic-perfectly plastic material with a stress-strain diagram such as that given in Fig. 2.9(b). Failure for ductile materials is assumed to occur when stresses or strains exceed those at the yield point. Materials such as cast iron, glass, concrete and epoxy are very brittle and can often be approximated as perfectly linear elastic-perfectly brittle materials similar to that given in Fig, 2.9(a). Failure for brittle materials is assumed to occur when stresses or strains reach a value for which rupture (separation) will occur. 

Stress-strain diagram comparing the performance of a bulk metal glass with other high strength materials. Data for these plots were taken from Table 9.1. 

Figure 12.21 Schematic description of the effect of hybrid reinforcement (glass, polypropylene, hybrid) on the stress-strain diagram (from Xu and Hannant [104]).

FIGURE 10.7 Typical stress-strain diagrams for brittle glass (A), resilient rubber (B), and ductile plastic (C). 

Any material, when stressed, stretches or is otherwise deformed. If the plastic and fiber are firmly bonded together, the deformation is the same. Since the fiber is more unyielding, a higher stress is developed in the glass than the plastic. If the stress-strain relationships of fiber and plastic are known, the stresses developed in each for a given strain can be computed and their combined action determined. Fig. 2.27 stress-strain (S-S) diagrams provide the basis for this analysis it provides related data such as strengths and modulus. 

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