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Calculate the load and resistance factors using the data of Problem 1 and a reliability of 99%.
Calculate the load and resistance factors for a reliability of 99% when the strength has a mean value of 65.4 MPa and COV 22%.
What is the required wall thickness (t = tf +tm) and fiber type that yields the minimum thickness ?
Compare the flexural modulus and strength at 249?C (dry) of clear cast bismaleimide 792/TM-123 with an extrapolation of the room temperature.
Calculate the reduced stiffness matrix in laminate coordinates of the fill and warp tows in Problem 2 .
Calculate the corresponding stress level in fill and warp, at the same location, in material coordinate system.
Use the computer program available on the Web site to calculate the tensile and shear strength values Fxt, Fxy of sample type .
Determine the Euler buckling load of a column clamped at the base and free at the loaded end.
Determine an approximate estimate for the load P that causes local buckling to a column with the dimensions and material of Example.
A simply supported rectangular beam (solid) of length L = 100 mm, width b = 10 mm is made of a [±45/02]S glass-polyester laminate with each lamina 0.125 mm.
Compute the deflection as a function of P and the maximum load that can be applied to the beam for first ply failure.
Design a box section to be used as a cantilever beam of length L = 2 m subject to a tip load P = 1000 N.
Compute the bending stiffness of a cantilever I-beam of length L = 30 cm, subjected to a tip-shear force Vz = 445 N.
Derive an expression for the failure moment per unit area in terms of the ratio r = h/b, for a constant material strength Fx.
What is the required wall thickness and material type for minimum cost?
Compute the laminate FPF strength Fxt. Note that the 904 lamina is the first to crack, thus defining FPF.
Design a cylindrical pressure vessel with diameter d = 4 m, internal pressure p = 3.0 MP a, with a COV Cp = 0.10 to achieve a reliability Re = 0.95 .
Draw the top view repetitive unit cell (RUC) for 5/1/2 weave counting along the x-direction.
Redefine the weave parameters, first by 90o rotating the weaving pattern, and second by considering the opposite face of the weaving pattern.
Draw the top view repetitive unit cell (RUC) for 4/2/1 weave counting along the x-direction.
Recalculate the tow elastic properties E1, E2, G12, G23, ?12, ?23 of weave type 1 in Table.
Calculate the compliance matrix [S] in laminate coordinates at x = aw/4, y = af/2, for the fill and warp tows of sample type 5 in Table.