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study help
engineering
elasticity theory applications
Questions and Answers of
Elasticity Theory Applications
For the fourth-order isotropic tensor given in Exercise 1.9, show that if β = γ , then the tensor will have the following symmetry Cijkl = Cklij.Data from exercise 1.9The most general form of a
Show that the fundamental invariants can be expressed in terms of the principal values as given by relations (1.6.5).Equation 1.6.5 I@ = + 12 + 13 = + 3 + 13 IIIa =
Determine the invariants, and principal values and directions of the following matrices. Use the determined principal directions to establish a principal coordinate system, and following the
A second-order symmetric tensor field is given by:Using MATLAB (or similar software), investigate the nature of the variation of the principal values and directions over the interval 1 ≤ x1 ≤ 2.
Calculate the quantities ∇.u, ∇×u, V2u, ∇u, tr (∇u) for the following Cartesian vector fields:a. b. c. = 2x1e+x1x2e2 + 2x1x3e3
The dual vector ai of an antisymmetric second-order tensor aij is defined by ai = –1/2εijkajk. Show that this expression can be inverted to get ajk = –εijkai.
Using index notation, explicitly verify the vector identities:a. b.c. (1.8.5) 1,2,3
Extend the results found in Example 1.5, and determine the forms of ∇f, ∇. u, V2f, and ∇ ×u for a three-dimensional cylindrical coordinate system (see Fig. 1.5).Fig 1.5Example 1.5Fig
For the spherical coordinate system (R, Ø, θ) in Fig. 1.6, show that:Fig 1.6 X @3 0 Ex R e2 en ee X2
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