Given the following state of stress at a point in a continuum, 0 0 Ar₂ 0 0 - Br3 MPa, Ar₂ -Bra 0 [0] = where A and B are constants. Determine (a) the body force vector such that the stress tensor corresponds to an equilibrium state, (b) the three principal invariants of at the point x = Bê₂ + Aê3, (e) the principal stress components and the associated planes at the point x = Bê₂ + Aê3, and (d) the maximum shear stress and associated plane at the point x = Bê₂ + Aê3.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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**4.27** Given the following state of stress at a point in a continuum,

\[ 
[\sigma] = \begin{bmatrix} 
0 & 0 & Ax_2 \\ 
0 & 0 & -Bx_3 \\ 
Ax_2 & -Bx_3 & 0 
\end{bmatrix} 
\text{ MPa},
\]

where \( A \) and \( B \) are constants. Determine:

(a) the body force vector such that the stress tensor corresponds to an equilibrium state,

(b) the three principal invariants of \(\sigma\) at the point \( x = B\hat{e}_2 + A\hat{e}_3 \),

(c) the principal stress components and the associated planes at the point \( x = B\hat{e}_2 + A\hat{e}_3 \), and

(d) the maximum shear stress and associated plane at the point \( x = B\hat{e}_2 + A\hat{e}_3 \).
Transcribed Image Text:**4.27** Given the following state of stress at a point in a continuum, \[ [\sigma] = \begin{bmatrix} 0 & 0 & Ax_2 \\ 0 & 0 & -Bx_3 \\ Ax_2 & -Bx_3 & 0 \end{bmatrix} \text{ MPa}, \] where \( A \) and \( B \) are constants. Determine: (a) the body force vector such that the stress tensor corresponds to an equilibrium state, (b) the three principal invariants of \(\sigma\) at the point \( x = B\hat{e}_2 + A\hat{e}_3 \), (c) the principal stress components and the associated planes at the point \( x = B\hat{e}_2 + A\hat{e}_3 \), and (d) the maximum shear stress and associated plane at the point \( x = B\hat{e}_2 + A\hat{e}_3 \).
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