Multiobjective optimization for design of multifunctional sandwich panel heat pipes with micro-architected truss cores

Abstract A micro-architected multifunctional structure, a sandwich panel heat pipe with a micro-scale truss core and arterial wick, is modeled and optimized. To characterize multiple functionalities, objective equations are formulated for density, compressive modulus, compressive strength, and maximum heat flux. Multiobjective optimization is used to determine the Pareto-optimal design surfaces, which consist of hundreds of individually optimized designs. The Pareto-optimal surfaces for different working fluids (water, ethanol, and perfluoro(methylcyclohexane)) as well as different micro-scale truss core materials (metal, ceramic, and polymer) are determined and compared. Examination of the Pareto fronts allows comparison of the trade-offs between density, compressive stiffness, compressive strength, and maximum heat flux in the design of multifunctional sandwich panel heat pipes with micro-scale truss cores. Heat fluxes up to 3.0 MW/m2 are predicted for silicon carbide truss core heat pipes with water as the working fluid.

[1]  Norman A. Fleck,et al.  Fabrication and structural performance of periodic cellular metal sandwich structures , 2003 .

[2]  Vikram Deshpande,et al.  Hierarchical Corrugated Core Sandwich Panel Concepts , 2007 .

[3]  Steven Nutt,et al.  Micro-scale truss structures with three-fold and six-fold symmetry formed from self-propagating polymer waveguides , 2008 .

[4]  H. Wadley.  Cellular Metals Manufacturing , 2002 .

[5]  M. Ashby,et al.  Cellular solids: Structure & properties , 1988 .

[6]  R. C. Weast.  CRC Handbook of Chemistry and Physics , 1973 .

[7]  Douglas T. Queheillalt,et al.  The effects of topology upon fluid-flow and heat-transfer within cellular copper structures , 2004 .

[8]  H. Wadley.  Multifunctional periodic cellular metals , 2006, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[9]  Alan D. Christiansen,et al.  Multiobjective optimization of trusses using genetic algorithms , 2000 .

[10]  L. Valdevit,et al.  Active cooling by metallic sandwich structures with periodic cores , 2005 .

[11]  Joseph R. Davis.  Properties and selection : nonferrous alloys and special-purpose materials , 1990 .

[12]  James F. Shackelford,et al.  The CRC Materials Science And Engineering Handbook , 1991 .

[13]  Stefanie Chiras,et al.  The structural performance of near-optimized truss core panels , 2002 .

[14]  Lorenzo Valdevit,et al.  Structural performance of near-optimal sandwich panels with corrugated cores , 2006 .

[15]  P. Phelan.  An introduction to heat pipes , 1996 .

[16]  L. Valdevit,et al.  A Materials Selection Protocol for Lightweight Actively Cooled Panels , 2008 .

[17]  Michael F. Ashby,et al.  Multifunctionality of cellular metal systems , 1998 .

[18]  Steven Nutt,et al.  Micro‐scale Truss Structures formed from Self‐Propagating Photopolymer Waveguides , 2007 .

[19]  John W. Hutchinson,et al.  Optimal truss plates , 2001 .

[20]  Howard P. Hodson,et al.  Convective heat dissipation with lattice-frame materials , 2004 .

[21]  John W. Hutchinson,et al.  Performance of sandwich plates with truss cores , 2004 .

[22]  Steven Nutt,et al.  Compression behavior of micro-scale truss structures formed from self-propagating polymer waveguides , 2007 .

[23]  P. Siarry,et al.  Multiobjective Optimization: Principles and Case Studies , 2004 .

[24]  John W. Hutchinson,et al.  Structurally optimized sandwich panels with prismatic cores , 2004 .