タイトル | Predicting Print-thru for the Sub-scale Beryllium Mirror Demonstrator (SBMD) |
著者(英) | Craig, Larry; J. Kevin Russell |
著者所属(英) | NASA Marshall Space Flight Center |
発行日 | 2002-01-01 |
言語 | eng |
内容記述 | This document presents a finite element method for predicting print-thru or quilting for a lightweight mirror in a low temperature environment. The mirror is represented with quadrilateral and triangular plate finite elements. The SBMD (Sub-scale Beryllium Mirror Demonstrator) is circular with a diameter of 50 cm and one flat side. The mirror structure is a thin-wall triangular cell core with a single facesheet. There is a 4 mm radius fillet between the facesheet and cell walls. It is made entirely of Beryllium. It is assumed that polishing the mirror surface creates a thin surface layer with different material properties. Finite element results are compared with measured values at cryogenic temperatures. |
NASA分類 | Optics |
権利 | No Copyright |