建模用于确定压容器服务材料兼容性的测试方法
Christopher P Looney1, Zachary M Hagan2, Matthew J Connolly3
1Colorado School of Mines, United states.
概括
有限元模型模拟了ISO 11114-4对气瓶的测试. 一个新的损坏参数将测试方法和使用条件关联起来,预测DOT 3AA气的裂开始.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算力学 计算力学 计算力学
背景情况:
- 气瓶需要严格的安全测试.
- 现有的测试方法 (ISO 11114-4) 需要与现实条件相对应.
- 预测建模对于评估材料完整性至关重要.
研究的目的:
- 为ISO 11114-4测试方法开发有限元模型.
- 校准构成和损伤模型,用于预测材料变形.
- 为了将各种测试方法与气瓶的使用条件相关联.
主要方法:
- 创建六个有限元固体模型 (样本,ISO测试,气).
- 使用实验数据对单调和循环构成模型进行校准.
- 开发和应用一种新的损害参数.
主要成果:
- 建议的损坏参数成功地与ISO方法B & C和使用条件相关联.
- 损伤参数预测了不同几何形状和负载的关键损伤开始.
- 参数研究估计了内部裂的DOT 3AA气的裂延伸周期.
结论:
- 用校准的构成和损坏模型进行有限元建模提供了一个强大的方法.
- 新的损坏参数提供了一种统一的方法来评估气瓶的完整性.
- 这项工作为未来对气环境的研究奠定了基础.
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