# Elasticity with Mathematica ®: An Introduction to Continuum by Andrei Constantinescu

By Andrei Constantinescu

This publication is meant for researchers, engineers and scholars in reliable mechanics, fabrics technology and physics who're attracted to utilizing the ability of recent computing to unravel a wide selection of difficulties of either useful and basic importance in elasticity. huge use of Mathematica within the booklet makes to be had to the reader a variety of recipes that may be simply adjusted to check specific tastes or specifications, to imagine options, and to hold out symbolic and numerical research and optimization.

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Extra info for Elasticity with Mathematica ®: An Introduction to Continuum Mechanics and Linear Elasticity

Example text

Alpha / 2 ]ˆ2 /. alpha / 2 ] /. 22) λ3 = 1 α π − e 1 + sin 2 4 α π + e 1 + sin u 2 = cos 2 4 u3 = e3. 9. An illustration of the polar decomposition of the deformation gradient F . Material vectors preserve their colour though the stretch by U and rotation by R. Images from left to right represent the decomposed evolution from initial to actual configuration. Other proofs In the particular case of simple shear, the analysis of eigenvectors and eigenvalues can be completed using a special technique based Hamilton–Cayley theorem in linear algebra, as described in the monograph by Marsden and Hughes (1994).

10. An illustration of the compatibility conditions for deformation. Consideration proceeds via the following stages: (a) initial geometry of the beam; (b) the beam being separated into pieces; (c) the imposition of local strain; (d) the object cannot be reassembled due to the incompatibility of strains – additional forces have to be applied. Then definitions of strain, stretch, and rotation tensors can be linearized. 29) where ε= 1 grad u + grad Tu 2 and ω= 1 grad u − grad Tu 2 denote the small strain tensor ε and small rotation tensor ω , respectively.

An example of the body force is the force of gravity. • Surface traction t is described by a vector field distributed over the surface boundary ∂ of body . Denoting the surface traction by the vector t (xx, t) represents the fact that the force t (xx, t)ds acts on an infinitesimal element of surface area ds at point x at time t. A particular type of body force arises when inertial effects during motion are considered. Let mass density be denoted by ρ, which is thought to be a given function over the entire body , such that for every part of the body ⊂ the mass of is given by ρ dv.