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#REDIRECT[[Pressure#Stress]]
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The '''stress''' is given by
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:<math>{\mathbf F} = \sigma_{ij} {\mathbf A}</math>
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where <math>{\mathbf F}</math> is the force,
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<math>{\mathbf A}</math> is the area, and <math>\sigma_{ij}</math> is the stress tensor, given by
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:<math>\sigma_{ij} \equiv \left[{\begin{matrix}
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  \sigma _x & \tau _{xy} & \tau _{xz} \\
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  \tau _{yx} & \sigma _y & \tau _{yz} \\
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  \tau _{zx} & \tau _{zy} & \sigma _z \\
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  \end{matrix}}\right]</math>
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where where <math>\ \sigma_{x}</math>, <math>\ \sigma_{y}</math>, and <math>\ \sigma_{z}</math> are normal stresses, and  <math>\ \tau_{xy}</math>, <math>\ \tau_{xz}</math>, <math>\ \tau_{yx}</math>, <math>\ \tau_{yz}</math>, <math>\ \tau_{zx}</math>, and <math>\ \tau_{zy}</math> are shear stresess.
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==References==
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<references/>
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'''Related reading'''
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*[http://dx.doi.org/10.1063/1.3245303 Aidan P. Thompson, Steven J. Plimpton, and William Mattson "General formulation of pressure and stress tensor for arbitrary many-body interaction potentials under periodic boundary conditions", Journal of Chemical Physics '''131''' 154107 (2009)]
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*[http://dx.doi.org/10.1063/1.3316134  G. C. Rossi and M. Testa "The stress tensor in thermodynamics and statistical mechanics", Journal of Chemical Physics '''132''' 074902 (2010)]
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*[http://dx.doi.org/10.1063/1.3582905 Nikhil Chandra Admal and E. B. Tadmor "Stress and heat flux for arbitrary multibody potentials: A unified framework", Journal of Chemical Physics '''134''' 184106 (2011)]
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[[category: classical mechanics]]

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