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| Fig. 6.8a-b: Cauchy tetrahedron used to define traction variation with orientation of plane. a) Surface areas of sides parallel to coordinate planes are labeled; direction angles for outward unit normal, n, are labeled; and component of normal vector are (nx, ny, nz). b) Traction vectors acting on sides parallel to coordinate planes are (-t1, -t2, -t3) and components of the traction vector t(n) are (tx, ty, tz). | ||||
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