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Fast Three-Dimensional Modeling of Atomic-Oxygen Undercutting of Protected Polymers

机译：受保护聚合物的原子氧底切的快速三维建模

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摘要

A method is presented to model atomic-oxygen erosion of protected polymers in low Earth orbit. Undercutting of protected polymers by atomic oxygen can occur as a result of the presence of scratch, crack, or pin window defects in the protective coatings. As a means of providing a better understanding of undercutting processes, a fast method of modeling atomic-oxygen undercutting of protected polymers has been developed. Current simulation methods often rely on computationally expensive ray-tracing procedures to track the surface-to-surface movement of individual "atoms." To reduce the burden of time-consuming calculations, the method introduced replaces computationally demanding individual particle simulations by substituting a model that utilizes both a geometric configuration-factor technique, which collectively governs the diffuse transport of atoms between surfaces, and an efficient algorithm, which rapidly computes the cumulative effects stemming from the series of atomic-oxygen collisions at the surfaces of an undercut cavity. This new method facilitates the systematic study of three-dimensional undercutting by allowing rapid simulations to be made over a wide range of erosion parameters.
机译：提出了一种方法来模拟低地球轨道上受保护聚合物的原子-氧侵蚀。保护涂层中存在刮擦，裂纹或针孔缺陷，会导致原子氧对受保护聚合物的欠切。为了更好地了解底切工艺，已开发出一种对受保护聚合物进行原子-氧底切建模的快速方法。当前的模拟方法通常依赖于计算上昂贵的射线追踪程序来追踪单个“原子”的表面到表面运动。为了减轻费时的计算负担，本文引入的方法通过使用利用共同控制原子在表面之间的扩散传输的几何构型因子技术和有效算法的模型来替代需要计算的单个粒子模拟，该模型快速计算底切腔表面的一系列原子-氧碰撞产生的累积效应。通过允许在广泛的腐蚀参数范围内进行快速模拟，这种新方法有助于对三维底切进行系统研究。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2004年第3期|p.340-344|共5页
  • 作者

    Aaron Snyder; Bruce A. Banks;

  • 作者单位

    NASA John H. Glenn Research Center at Lewis Field, Cleveland, Ohio 44135;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空;
  • 关键词

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