Influence of Layup and Curing on the Surface Accuracy in the Manufacturing of Carbon Fiber Reinforced Polymer (CFRP) Com
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Influence of Layup and Curing on the Surface Accuracy in the Manufacturing of Carbon Fiber Reinforced Polymer (CFRP) Composite Space Mirrors Zhiyong Yang1,2 · Jianbao Zhang2 · Yongjie Xie3 · Boming Zhang1 · Baogang Sun2 · Hongjun Guo2
Received: 12 February 2017 / Accepted: 15 February 2017 © Springer Science+Business Media Dordrecht 2017
Abstract Carbon fiber reinforced polymer, CFRP, composite materials have been used to fabricate space mirror. Usually the composite space mirror can completely replicate the high-precision surface of mould by replication process, but the actual surface accuracy of replicated space mirror is always reduced, still needed further study. We emphatically studied the error caused by layup and curing on the surface accuracy of space mirror through comparative experiments and analyses, the layup and curing influence factors include curing temperature, cooling rate of curing, method of prepreg lay-up, and area weight of fiber. Focusing on the four factors, we analyzed the error influence rule and put forward corresponding control measures to improve the surface figure of space mirror. For comparative analysis, six CFRP composite mirrors were fabricated and surface profile of mirrors were measured. Four guiding control measures were described here. Curing process of composite space mirror is our next focus. Keywords CFRP composite · Space mirrors · Curing temperature · Area weight of fiber · Cooling rate of curing · Method of prepreg lay-up
1 Introduction Compared with Zerodur, ULE, SiC and other traditional optical materials used for space mirror, carbon fiber reinforced polymer composite (CFRP) has better comprehensive
Zhiyong Yang
[email protected] 1
School of Material Science and Engineering, Beihang University, Beijing 100191, China
2
Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China
3
Xi’an Institute of Optics & Precision Mechanics, Chinese Academy of Sciences, Xi’an 710068, China
Appl Compos Mater
properties. Excellent specific stiffness, good thermal stability and diversiform design ability are obvious characteristics of carbon fiber composite, which make it a new direction for space optical mirror in recent decades, especially for large size and high resolution space mirrors. CFRP composite mirrors are already applied to space-based telescopes, and space detector operating at relatively wide wavelength (from far-infrared to far-visible), examples include space-based PLANK telescope [1] and RICH1 detector [2, 3]. The CFRP composite space mirrors are fabricated using a replication process. Different form manufacturing method of the traditional optical materials, replication process is a unique fabrication technique of CFRP composite mirror, especially for the manufacture of large size space mirror. The space mirror surface formed over a mandrel with the desired (opposite) curve. This process is described in previous papers by CMA [4–6]. Replication process has the following characteristics: short manufacturing cycle, low manufactur
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