ESA initiatives to improve mechanical design and verification methods for ceramic structures

Graham Coe; Stéphanie Behar-Lafenetre; Laurence Cornillon; Michaël Rancurel; David Denaux; Dirk Ballhause; Stefano Lucarelli

doi:10.1117/12.2030133

30 September 2013 ESA initiatives to improve mechanical design and verification methods for ceramic structures

Graham Coe, Stéphanie Behar-Lafenetre, Laurence Cornillon, Michaël Rancurel, David Denaux, Dirk Ballhause, Stefano Lucarelli

Author Affiliations +

Proceedings Volume 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems; 88370C (2013) https://doi.org/10.1117/12.2030133
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

Current and future space missions demanding ever more stringent stability and precision requirements are driving the need for (ultra) stable and lightweight structures. Materials best suited to meeting these needs in a passive structural design, centre around ceramic materials or specifically tailored CFRP composite. Ceramic materials have essential properties (very low CTE, high stiffness), but also unfavorable properties (low fracture toughness). Ceramic structures feature in a number of current and planned ESA missions. These missions benefit from the superior stiffness and thermo-elastic stability properties of ceramics, but suffer the penalties inherent to the brittle nature of these materials. Current practice in designing and sizing ceramic structures is to treat ceramic materials in a deterministic manner similar to conventional materials but with larger safety factors and conservatively derived material strength properties. This approach is convenient, but can be penalising in mass and in practice does not arrive at an equivalent structural reliability compared to metallic components. There is also no standardised approach for the design and verification of ceramic structures in Europe. To improve this situation, ESA placed two parallel study contracts with Astrium and Thales Alenia Space with the objective to define design and verification methodology for ceramic structures, with the further goal to establish a common ‘handbook’ for design and verification approach. This paper presents an overview of ceramic structures used in current and future ESA missions and summarises the activities to date in the frame of improving and standardising design and verification methods for ceramic structures.

Citation Download Citation

Graham Coe, Stéphanie Behar-Lafenetre, Laurence Cornillon, Michaël Rancurel, David Denaux, Dirk Ballhause, and Stefano Lucarelli "ESA initiatives to improve mechanical design and verification methods for ceramic structures", Proc. SPIE 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems, 88370C (30 September 2013); https://doi.org/10.1117/12.2030133

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