在合金2024中对正方形损伤的建模和表征
Nenad Djordjevic1, Ravindran Sundararajah2, Rade Vignjevic1
1Centre for Assessment of Structures and Materials under Extreme Conditions (CASMEC), Department of Mechanical and Aerospace Engineering, Brunel University London, London UB8 3PH, UK.
Materials (Basel, Switzerland)
|September 14, 2024
概括
орто热金属的新构成模型使用标准航空航天测试方法准确预测材料的行为,包括塑性和损伤. 这种经过验证的模型增强了航空航天应用中的元件的模拟主导设计.
科学领域:
- 材料科学 材料科学 材料科学
- 计算力学 计算力学 计算力学
- 航空航天工程 航空航天工程
背景情况:
- 开发准确的构成型模型对正方形金属是航空航天部件设计的关键.
- 现有的模型可能无法完全捕捉各种负载条件下的复杂行为,如可塑性和损伤.
- 标准的表征方法对于工业应用中的参数确定是必不可少的.
研究的目的:
- 开发一个热力学上一致的构成模型,用于正极金属.
- 使用航空航天行业标准表征技术来确定模型参数.
- 为了验证模型对航空航天级合金的预测能力.
主要方法:
- 添加式应变张器分解包括弹性,塑料 (希尔的潜力) 和损伤 (正向潜力) 组件.
- 使用有效应力和能量等价原理的连续损伤机制.
- 使用标准和非均横截面样本进行材料表征,并与数字图像相关性进行局部位移测量.
- 在Abaqus中作为用户材料子程序的实现,根据实验数据进行验证和验证.
主要成果:
- 开发的构成模型准确地代表了性金属的弹性,塑性和损伤行为.
- 通过单元测试的验证证实了模型的单个组件的准确性.
- 对实验准静态表征测试的验证表明,该模型能够预测合金2024-T3.3的观察行为.
结论:
- 经过验证的构成模型为模拟正极金属的机械反应提供了一个强大的工具.
- 该模型可实现对航空航天部件的高效模拟主导的设计改进,例如硬化面板和薄壁结构.
- 这项工作有助于提高航空航天工业中合金组件的可靠性和性能.
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