Materials Science And Engineering Properties
1st Edition
ISBN: 9781111988609
Author: Charles Gilmore
Publisher: Cengage Learning
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Chapter 3, Problem 32CQ
To determine
To fill:
The correct term in the given blank.
Introduction:
Composite material is made up of at least two different materials having different physical and
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Which one is NOT correct about composite materials?
(A
Unidirectionally aligned fiberglass-reinforced PMC composites have isotropic mechanical properties.
B) one of the roles of the matrix material in composite materials is to transfer the applied load to the reinforcement
One of the motivations to manufacture composite materials is reducing the weight
The composite bar shown is rigidly attached to the two supports. The left portion of the bar is copper, of uniform cross-sectional area 80 c?^2
and length 30 cm. The right portion is aluminum, of uniform cross-sectional area 20 c?2
and length 20 cm. At a temperature of 26℃ the entire assembly is stress free. The temperature of the structure drops
and during this process the right support yields 0.025 mm in the direction of the contracting metal. Determine the
minimum temperature to which the assembly may be subjected in order that the stress in the aluminum does not
exceed 160 MPa. For copper E = 200 GPa, ? = 17x10^-6/℃, and for Aluminum E = 80 GPa, ? = 23x10^-6/℃.
A ceramic matrix composite contains internal flaws as large as 0.001 cm in length. The plane strain fracture toughness of the composite is 45 MPaÖm, and the tensile strength is 550 Mpa. Will the stress cause the composite to fail before the tensile strength is 550 MPa. Will the stress cause the composite to fail before the tensile strength is reached? Assume that f=1.
Chapter 3 Solutions
Materials Science And Engineering Properties
Ch. 3 - Prob. 1CQCh. 3 - Prob. 2CQCh. 3 - Prob. 3CQCh. 3 - Prob. 4CQCh. 3 - Prob. 5CQCh. 3 - Prob. 6CQCh. 3 - Prob. 7CQCh. 3 - Prob. 8CQCh. 3 - Prob. 9CQCh. 3 - Prob. 10CQ
Ch. 3 - Prob. 11CQCh. 3 - Prob. 12CQCh. 3 - Prob. 13CQCh. 3 - Prob. 14CQCh. 3 - Prob. 15CQCh. 3 - Prob. 16CQCh. 3 - Prob. 17CQCh. 3 - Prob. 18CQCh. 3 - Prob. 19CQCh. 3 - Prob. 20CQCh. 3 - Prob. 21CQCh. 3 - Prob. 22CQCh. 3 - Prob. 23CQCh. 3 - Prob. 24CQCh. 3 - Prob. 25CQCh. 3 - Prob. 26CQCh. 3 - Prob. 27CQCh. 3 - Prob. 28CQCh. 3 - Prob. 29CQCh. 3 - Prob. 30CQCh. 3 - Prob. 31CQCh. 3 - Prob. 32CQCh. 3 - Prob. 33CQCh. 3 - Prob. 1ETSQCh. 3 - Prob. 2ETSQCh. 3 - Prob. 3ETSQCh. 3 - Prob. 4ETSQCh. 3 - Prob. 5ETSQCh. 3 - Prob. 6ETSQCh. 3 - Prob. 7ETSQCh. 3 - Prob. 1DRQCh. 3 - Prob. 2DRQCh. 3 - Prob. 3DRQCh. 3 - Prob. 3.1PCh. 3 - Prob. 3.2PCh. 3 - Prob. 3.3PCh. 3 - Prob. 3.4PCh. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10PCh. 3 - Prob. 3.11PCh. 3 - Prob. 3.12PCh. 3 - Prob. 3.13PCh. 3 - Prob. 3.14P
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- Composite _________ is produced by laying fibers in random directions in a plane.arrow_forwardThe frame of a space shuttle type vehicle must have a high yield strength and high stillness, and the most important design factor is weight. Of all the materials presented in this chapter, what material might be the most suitable for the frame of a space shuttle? Assume that there will be both tensile and compressive stresses. For a space shuttle, cost is not a limiting factor. (a) You can eliminate entire classes of materials from consideration with a brief statement about their unsuitability. (b) What material has the highest specific yield strength? Give the yield strength, specific gravity, specific yield strength, elastic modulus, and specific elastic modulus for this material. (c) What material has the highest specific elastic modulus? Give the yield strength, specific gravity, specific yield strength, elastic modulus, and specific elastic modulus for this material. (d) Compare the materials with the highest specific yield strength and highest specific elastic modulus for suitability in the space shuttle frame. (C) Discuss the suitability of the top-rated material for this design from the viewpoint of the ability to produce a frame.arrow_forwardCN=44arrow_forward
- Do soonarrow_forwardA ceramic matrix composite contains internal flaws as largeas0.001 cm in length. The plane strain fracture toughness of the composite is 45 MPaVm and the tensile strength is 550 MPa. Will the stress cause the composite to fail before the tensile strength is reached? Assume that f- 1.arrow_forwardREACTION OF A RIGID PLATE II A) Determine the internal and external reaction forces of a composite structure. To check the solution you will need to specify reaction components Ax, Az, Ma, Bx, Bz (body II), Cx, Cz (body III), Dx, Dz, Ex, Ez (body IV), Fx, Fz (body V), G (force transmitted by the member gj), H (force transmitted by the member hj), Kx, Kz. coefficient's are a= 1,1 b= 0,6 c=1.1arrow_forward
- When loads were applied to the strips of Ag, cardboard and a plastic sheet, it was only the Ag which did not deform. The Ag strip does not have ___________ property. a. hardness b. plasticity c. flexibility d. elasticityarrow_forwardA laminated [0/90/0/90]s graphite/epoxy beam is 1 mm thick, is 20 mm wide, and has 0.125 mm thick plies. The lamina properties are E1 = 180 GPa, E2 = 10 GPa, ν12 = 0.28, G12 = 7 GPa Xt = 1700 MPa, Xc = 1400 MPa, Yt = 40 MPa, Yc = 230 MPa (a) Determine the flexural modulus of the beam (b) How could the flexural modulus be improved without changing the ply materials, the number of plies, or the ply orientations? (c) Using the Maximum Stress Criterion for each ply, determine the magnitude of the maximum allowable bending moment that the beam can withstand. Which ply fails first?arrow_forwardFind the centroid of the following composite object................arrow_forward
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