Lattice-structures and constructs with designed thermal expansion coefficients

Spadaccini, Christopher; Hopkins, Jonathan

Lattice-structures and constructs with designed thermal expansion coefficients

Patent · 28 October 2014

OSTI ID:1162122

Spadaccini, Christopher; Hopkins, Jonathan

A thermal expansion-managed lattice structure having a plurality of unit cells each having flexure bearing-mounted tabs supported on a base and actuated by thermal expansion of an actuator having a thermal expansion coefficient greater than the base and arranged so that the tab is inwardly displaced into a base cavity. The flexure bearing-mounted tabs are connected to other flexure-bearing-mounted tabs of adjacent unit cells so that the adjacent unit cells are spaced from each other to accommodate thermal expansion of individual unit cells while maintaining a desired bulk thermal expansion coefficient of the lattice structure as a whole.

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC52-07NA27344

Assignee:: Lawrence Livermore National Security, LLC (Livermore, CA)

Patent Number(s):: 8,871,338

Application Number:: 13/607,640

OSTI ID:: 1162122

Country of Publication:: United States

Language:: English

References (10)

Synthesis of precision serial flexure systems using freedom and constraint topologies (FACT) Hopkins, Jonathan B.; Culpepper, Martin L. Precision Engineering, Vol. 35, Issue 4, p. 638-649 https://doi.org/10.1016/j.precisioneng.2011.04.006	journal	October 2011
Concepts for structurally robust materials that combine low thermal expansion with high stiffness Steeves, Craig A.; dos Santos e Lucato, Sergio L.; He, Ming Journal of the Mechanics and Physics of Solids, Vol. 55, Issue 9, p. 1803-1822 https://doi.org/10.1016/j.jmps.2007.02.009	journal	September 2007
Shrinkage and Thermal Expansion of a Two Phase Material Cribb, J. L. Nature, Vol. 220, Issue 5167 https://doi.org/10.1038/220576a0	journal	November 1968
Cellular solids with tunable positive or negative thermal expansion of unbounded magnitude Lakes, Roderic Applied Physics Letters, Vol. 90, Issue 22 https://doi.org/10.1063/1.2743951	journal	May 2007
Composites with extremal thermal expansion coefficients Sigmund, O.; Torquato, S. Applied Physics Letters, Vol. 69, Issue 21 https://doi.org/10.1063/1.117961	journal	November 1996
Design of smart composite materials using topology optimization Sigmund, O.; Torquato, S. Smart Materials and Structures, Vol. 8, Issue 3 https://doi.org/10.1088/0964-1726/8/3/308	journal	January 1999
Cellular solid structures with unbounded thermal expansion Lakes, R. Journal of Materials Science Letters, Vol. 15, Issue 6 https://doi.org/10.1007/BF00275406	journal	January 1996
Synthesis of multi-degree of freedom, parallel flexure system concepts via freedom and constraint topology (FACT). Part II: Practice Hopkins, Jonathan B.; Culpepper, Martin L. Precision Engineering, Vol. 34, Issue 2, p. 271-278 https://doi.org/10.1016/j.precisioneng.2009.06.007	journal	April 2010
Tailorable thermal expansion hybrid structures Jefferson, George; Parthasarathy, Triplicane A.; Kerans, Ronald J. International Journal of Solids and Structures, Vol. 46, Issue 11-12, p. 2372-2387 https://doi.org/10.1016/j.ijsolstr.2009.01.023	journal	June 2009
Synthesis of multi-degree of freedom, parallel flexure system concepts via Freedom and Constraint Topology (FACT) – Part I: Principles Hopkins, Jonathan B.; Culpepper, Martin L. Precision Engineering, Vol. 34, Issue 2, p. 259-270 https://doi.org/10.1016/j.precisioneng.2009.06.008	journal	April 2010

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