Thermo-elastic stress and deformation analysis of optical filters satellites payload

Fatouma Maamar

doi:10.59400/mea4365

Thermo-elastic stress and deformation analysis of optical filters satellites payload

Fatouma Maamar
Algerian Space Agency, Satellites Development Center, Oran 31130, Algeria

Article ID: 4365

DOI: https://doi.org/10.59400/mea4365

Keywords: optical filter design, assembly tray, glue pads, MOS (margin of safety), filter deformation

Abstract

Modern optical filter systems used in space applications are required to operate under severe thermal and mechanical environments for extended mission durations without degradation of their optical or structural performance. However, the deposition of multilayer onto optical substrates with different thermo-mechanical properties can generate residual and thermally induced stresses. These stresses may lead to substrate deformation, degradation of optical performance, and damage to the bonding interfaces between the optical filter and its supporting structure. In this study, a comprehensive thermo-elastic analysis of an optical filter assembly, including the coated substrate, adhesive glue pads, and filter tray, is carried out using the finite element method. A detailed three-dimensional numerical model was developed in ANSYS to investigate the thermo-mechanical response of the assembly under representative thermal loading conditions corresponding to the operational environment of a spaceborne optical payload. The analysis focuses on the evaluation of Von Mises stresses, thermal deformations, and the structural integrity of the adhesive bonding regions, which are considered critical areas for the reliability of the assembly. The primary objective of this work is to assess and validate the structural design of the optical filter tray implemented in the ALSAT-1B satellite payload and to quantify the effects of thermal loading on the mechanical behavior of the bonded optical components. The numerical results are further used to evaluate the structural margins and identify potential failure risks associated with thermal contraction and material mismatch effects. The results indicate that the configuration with a higher number of glue pad contact points between the optical filter and filter tray provides the most favorable mechanical behavior, significantly reducing the risk of on-orbit failure.

Published

2026-03-04

How to Cite

Maamar, F. (2026). Thermo-elastic stress and deformation analysis of optical filters satellites payload. Mechanical Engineering Advances, 4(1). https://doi.org/10.59400/mea4365

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Vol. 4 No. 1 (2026)

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Article

This work is licensed under a Creative Commons Attribution 4.0 International License.

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