Structural Analysis of Polymeric Composite Materials by Mark E. Tuttle | 9780824747176 | 0824747178 | Holooly

Structural Analysis

Structural Analysis of Polymeric Composite Materials

46 SOLVED PROBLEMS

Question: 10.S.P.3

[(02/90)2]s graphite–epoxy laminate is cured at 175°C and then cooled to room temperature (20°C). After cooling, the flat laminate is trimmed to in-plane dimensions of 300 × 150 mm and mounted in an assembly that provides type S2 simple supports along the two edges x = 0 and x = a, and type S1 ...

Verified Answer:

A

[(0_{2}/90)_{2}]_{s}

graphite–epo...

Question: 6.S.P.3

Assume that the panel considered in Sample Problem 1 is actually an eight-ply [0/30/90/-30]s graphite–epoxy laminate. Assume that the laminate was initially flat and stress-free (i.e., ignore possible preexisting stresses/strains due to temperature and/or moisture changes). Determine the strains ...

Verified Answer:

From Sample Problem 1, the midplane strains and cu...

Question: 6.S.P.8

Determine the effective extensional and flexural moduli, thermal expansion coefficients, and moisture expansion coefficients for a [30/0/90]s graphite-epoxy laminate. Use material properties listed for graphite-epoxy in Table 3 of Chap. 3, and assume that each ply has a thickness of 0.125 mm. ...

Verified Answer:

As described in this section, effective moduli are...

Question: 11.S.P.3

A [25°]12 graphite-epoxy laminate is trimmed to in-plane dimensions of 300×150 mm and is mounted in an assembly that provides type S4 simple supports along all four edges. The laminate is then subjected to a uniform transverse load q(x,y) = 30 kPa. No in-plane loads are applied ...

Verified Answer:

Note that the plate has an aspect ratio R = 150/30...

Question: 11.S.P.1

A [(±45/0)2]s graphite-epoxy laminate is cured at 175°C and then cooled to room temperature (20°C). After cooling, the flat laminate is trimmed to in-plane dimensions of 300×150 mm and is mounted in an assembly that provides type S4 simple supports along all four edges. The x axis is defined ...

Verified Answer:

Based on the properties listed in Table 3 of Chap....

Question: 11.S.P.2

The [(±45/0)2]s graphite-epoxy laminate described in Sample Problem 1 is again subjected to type S4 simple supports along all four edges and a uniform transverse load q(x,y) = 30 kPa. However, the plate is now also subjected to uniform in-plane stress resultants Nxx = Nyy. Use a Ritz analysis to ...

Verified Answer:

As was the case for Sample Problem 1, solutions fo...

Question: 6.5

A [30/0/90]T graphite-epoxy laminate is subjected to the following stress and moment resultants: Nxx = 50 kN/m Nyy = -10 kN/m Nxy = 0 N/m Mxx = 1N – m/m Myy = -1N – m/m Mxy = 0N – m/m Determine the following quantities caused by these stress and moment resultants: (a) Midplane strains and ...

Verified Answer:

Note that this is the same laminate considered in ...

Question: 10.S.P.7

Two [02/90)2]s graphite–epoxy laminates are cured at 175°C and then cooled to room temperature (20°C). After cooling, one laminate is trimmed to in-plane dimensions of 300×150 mm, whereas the second is trimmed to in-plane dimensions of 3000×150 mm. Both laminates are then mounted in assemblies that ...

Verified Answer:

A

[(0_{2}/90)_{2}]_{s}

graphite–epo...

Question: 10.S.P.5

A [(02/90)2]s graphite–epoxy laminate is cured at 175°C and then cooled to room temperature (20°C). After cooling, the flat laminate is trimmed to in-plane dimensions of 300 × 150mm and mounted in an assembly that provides type S4 simple supports along all four edges. The x axis is defined parallel ...

Verified Answer:

A

[(0_{2}/90)_{2}]_{s}

graphite–epo...

Question: 10.S.P.4

A [(02/90)2]s graphite–epoxy laminate is cured at 175°C and then cooled to room temperature (20°C). After cooling, the flat laminate is trimmed to in-plane dimensions of 300×150 mm and mounted in an assembly that provides type S4 simple supports along all four edges. The x axis is defined parallel ...

Verified Answer:

A

[(0_{2}/90)_{2}]_{s}

graphite–epo...

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