Vol. 14, No. 1, 2019

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Anisotropic multimaterial lattices as thermal adapters

Marina M. Toropova

Vol. 14 (2019), No. 1, 155–178

Design concepts for anisotropic adaptive lattices compounded of triangular multimaterial cells are considered. The lattices connect two parts of a structure (referred here as the substrates) made of materials with different coefficients of thermal expansion (CTEs) and subject to large variation of temperature. They are designed to eliminate mismatched thermal expansion and provide constant independent of temperature distance between the substrates. Because all connections with the substrates and within the lattice are made with pins, the whole structure is free of bending and thermal expansion mismatch stresses. The designed lattices are scale independent. Relationships between cell geometry (triangle angles and height) and the CTEs of selected lattice materials are obtained. Two-cell and three-cell one-row and five-cell two-row planar lattices are designed. Furthermore, axisymmetric adaptive lattice assembly is considered. Such a lattice can have cylindrical or conical shape and may be compounded of several rows. Cell members in all designed lattices are made of conventional materials. Lattice materials providing the largest structural efficiency are recommended.

thermal mismatch adapters, composite cylindrical and conical lattices, multimaterial triangular cells, satellite connectors
Received: 27 November 2018
Revised: 3 January 2019
Accepted: 17 January 2019
Published: 7 April 2019
Marina M. Toropova
MT Medi Corp
Toronto, ON