What is Coulomb's theory?

Q.  According to Coulomb's theory, material subjected to complex stresses fails, if ________ shear stress induced in the material exceeds _______ shear stress at the yield point.
- Published on 21 Sep 15

a. minimum, maximum
b. maximum, minimum
c. maximum, maximum
d. minimum, minimum

ANSWER: maximum, maximum

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    Discussion

  • Sravanthi   -Posted on 25 Nov 15
    - Different theories of failures are developed depending upon physical behavior of materials.

    - Coulomb's theory is also called as maximum shear stress theory.

    - According to Coulomb's theory, material subjected to complex stresses fails, if maximum shear stress induced in the material exceeds maximum shear stress at the yield point.

    - At no failure condition, maximum shear stress is given as qmax = qyp, here qyp is the yield point stress or stress at elastic limit.

    - Coulomb's theory is suitable for ductile materials. Maximum shear stress theory is represented as shown below.


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