( x , y , z ) or ![](img/equ1.gif)
![](img/fig3.gif) |
----right hand tria |
Displacement (u , v , w ) or ![](img/equ3.gif)
Stress = Linear
, stress vector (force / area)
T Stress vector = Force / Area with outward drawn normal ![](img/equ5.gif)
Similarly for other plane
Infinite plane exist at a point P
Infinite vectors
Plane/ Area is defined by outward drawn normal.
Infinite planes
3 mutually outward drawn planes at point P
![](img/fig10.gif) |
(x1, x2 , x3,)
Planes
at P
|
Stress
vector
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State of stress at
a point |
![](img/equ10.gif)
State of stress at a point = ![](img/equ13.gif)
![](img/fig12.gif)
Body is continuous and remain continuous under
the action of external forces -
![](img/fig13.gif)
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(H1) Elastic Continuum Neighbor remain neighbor
under external force No cracks /gaps or voids
(H2) There exists a unique unstressed state of the solid body
to which the body returns whenever all the external forces
are removed.
(H3) Principle of super position holds good
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