Give an approximate value for the tensile strength of a Boron/Aluminum composite with Vf = 0.4. Aluminum 2024 has E = 71 GPa, Poisson = 0.334, yield strength Sy = 76 MPa, strain-to-failure Ey = 22%. Boron fibers have E = 400 GPa, strength = 3.4 GPa, Poisson = 0.25. a. Compute F1t, assuming the Aluminum matrix remains elastic up to failure. If the value found is larger than Sy, the matrix yields, thus invalidating the assumption. b. Recompute using O1 = VfOf + (1 - Vf)Om c. Check that the strain-to-failure is not exceeded.

Elements Of Electromagnetics
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Give an approximate value for the tensile strength of a Boron/Aluminum composite with Vf = 0.4. Aluminum 2024 has E = 71 GPa, Poisson = 0.334, yield strength Sy = 76 MPa, strain-to-failure Ey = 22%. Boron fibers have E = 400 GPa, strength = 3.4 GPa, Poisson = 0.25.

a. Compute F1t, assuming the Aluminum matrix remains elastic up to failure. If the value found is larger than Sy, the matrix yields, thus invalidating the assumption.

b. Recompute using O1 = VfOf + (1 - Vf)Om

c. Check that the strain-to-failure is not exceeded.

Problem 4.14 Give an approximate value for the tensile strength of a Boron/Aluminum
composite with Vj = 0.4. Aluminum 2024 has E = 71 GPa, Potsson = 0.334, yield strength
Sy = 76 MPa, strain-to-failure = 22%. Boron fibers have E = 400 GPa, strength
= 3.4 GPa, Poisson = 0.25.
(c) Compuie Fit assuming the Aluminum matriz remains eiastic up to failure. If the value
found is larger than Sy, the matriz yields, thus invalidating the assumption.
(B) Recompute using 71=Vgo!+ (1–V})7m.
(c) Check that the strain-to-failure is not exceeded.
Transcribed Image Text:Problem 4.14 Give an approximate value for the tensile strength of a Boron/Aluminum composite with Vj = 0.4. Aluminum 2024 has E = 71 GPa, Potsson = 0.334, yield strength Sy = 76 MPa, strain-to-failure = 22%. Boron fibers have E = 400 GPa, strength = 3.4 GPa, Poisson = 0.25. (c) Compuie Fit assuming the Aluminum matriz remains eiastic up to failure. If the value found is larger than Sy, the matriz yields, thus invalidating the assumption. (B) Recompute using 71=Vgo!+ (1–V})7m. (c) Check that the strain-to-failure is not exceeded.
Em
Fu - [V₁ + (1-V₁)] F₁
(4.68)
Transcribed Image Text:Em Fu - [V₁ + (1-V₁)] F₁ (4.68)
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