By Konstantin A. Lurie
This e-book supplies a mathematical therapy of a singular suggestion in fabric technological know-how that characterizes the houses of dynamic fabrics - that's, fabric ingredients whose homes are variable in area and time. in contrast to traditional composites which are usually present in nature, dynamic fabrics are in general the goods of contemporary know-how built to take care of the best keep an eye on over dynamic strategies. those fabrics have diversified purposes similar to: tunable left-handed dielectrics, optical pumping with high-energy pulse compression, and electromagnetic stealth know-how, to call a couple of. Of designated importance is the participation of dynamic fabrics in virtually each optimum fabric layout in dynamics. The ebook discusses a few basic beneficial properties of dynamic fabrics as thermodynamically open platforms; it supplies their sufficient tensor description within the context of Maxwell's concept of relocating dielectrics and makes a distinct emphasis at the theoretical research of spatio-temporal fabric composites (such as laminates and checkerboard structures). a few strange purposes are indexed besides the dialogue of a few ordinary optimization difficulties in space-time through dynamic fabrics.
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Additional info for An Introduction to the Mathematical Theory of Dynamic Materials
This one is defined as a set of four vectors E, B, H, D, termed, respectively, the electric field, the magnetic induction, the magnetic field, and the electric displacement.
7. In this figure, the matrix and the oval-shaped (shaded) inclusions are occupied by two diﬀerent materials. Along the oval interfaces, there will always 20 2 An Activated Elastic Bar: Eﬀective Properties be parts where ineqs. 5) are violated. On the other hand, a rectangular microstructure shown in Fig. 5) is satisfied on both horizontal and vertical interfaces. For a laminate of the type shown in Fig. 4, ineqs. 5) become satisfied by a due choice of V ; bearing this in mind, we shall now calculate the eﬀective parameters of an activated elastic bar.
1 Longitudinal vibrations of activated elastic bar Fig. 2. An immovable interface: V = 0. Fig. 3. A moving interface: | V |< a1 . 21 22 2 An Activated Elastic Bar: Eﬀective Properties Fig. 4. A moving interface: a1 < V < a2 . Fig. 5. A moving interface: −a2 < V < −a1 . 1 Longitudinal vibrations of activated elastic bar Fig. 6. A moving interface: | V |> a2 . Fig. 7. A matrix microstructure in space-time violating ineqs. 5). 5). 6) this co-moving frame is travelling with velocity V in the positive z-direction.