Vascular structures for volumetric cooling and mechanical strength

When solid material is removed in order to create flow channels in a load carrying structure, the strength of the structure decreases. On the other hand, a structure with channels is lighter and easier to transport as part of a vehicle. Here, we show that this trade off can be used for benefit, to design a vascular mechanical structure. When the total amount of solid is fixed and the sizes, shapes, and positions of the channels can vary, it is possible to morph the flow architecture such that it endows the mechanical structure with maximum strength. The result is a multifunctional structure that offers not only mechanical strength but also new capabilities necessary for volumetric functionalities such as self-healing and self-cooling. We illustrate the generation of such designs for strength and fluid flow for several classes of vasculatures: parallel channels, trees with one, two, and three bifurcation levels. The flow regime in every channel is laminar and fully developed. In each case, we found that it...

[1]  Adrian Bejan,et al.  Design with constructal theory , 2008 .

[2]  Adrian Bejan,et al.  Vascularized materials with heating from one side and coolant forced from the other side , 2007 .

[3]  Adrian Bejan,et al.  Networks of channels for self-healing composite materials , 2006 .

[4]  D. Wu,et al.  Self-healing polymeric materials: A review of recent developments , 2008 .

[5]  L. C. Brinson,et al.  Finite element simulation of a self-healing shape memory alloy composite , 2006 .

[6]  Anthony Duncan Jefferson,et al.  Micro‐mechanical damage and rough crack closure in cementitious composite materials , 2007 .

[7]  Valérie Sauvant-Moynot,et al.  Self-healing coatings : An alternative route for anticorrosion protection , 2008 .

[8]  Adrian Bejan,et al.  Vascular materials cooled with grids and radial channels , 2009 .

[9]  Carolyn M. Dry,et al.  Procedures developed for self-repair of polymer matrix composite materials , 1996 .

[10]  Adrian Bejan,et al.  Vascularization with trees matched canopy to canopy: Diagonal channels with multiple sizes , 2008 .

[11]  Adrian Bejan,et al.  Vascularized materials: Tree-shaped flow architectures matched canopy to canopy , 2006 .

[12]  A. Bejan.  Convection Heat Transfer , 1984 .

[13]  A. Bejan.  Advanced Engineering Thermodynamics , 1988 .

[14]  Akbar Alibeigloo,et al.  Exact solution for thermo-elastic response of functionally graded rectangular plates , 2010 .

[15]  Adrian Bejan,et al.  Vascularization with grids of channels: multiple scales, loops and body shapes , 2007 .

[16]  T. Bennett,et al.  A model for cementitious composite materials based on micro-mechanical solutions and damage-contact theory , 2010 .

[17]  Adrian Bejan,et al.  Vascularized networks with two optimized channel sizes , 2006 .

[18]  Adrian Bejan,et al.  The emergence of vascular design in three dimensions , 2008 .

[19]  Adrian Bejan,et al.  Dendritic vascularization for countering intense heating from the side , 2008 .

[20]  Andrew J. Gunnion,et al.  Battle damage repair of a helicopter composite frame-skin junction. Part 1: Depot repair , 2009 .