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准静态和动态拉伸行为和PEEK高温病理的构成模型
Lizhi Tian1, Jiaxin Deng2, Xin Zhang3
1Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, China.
Materials (Basel, Switzerland)
|November 27, 2025
概括
本研究描述了在不同温度和应变速率下聚乙烯-乙烯- (PEEK) 的机械性能. 一个经过修改的谢尔伍德-弗罗斯特模型准确地预测了PEEK.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物力学 聚合物力学
- 构成型建模 构成型建模
背景情况:
- 聚乙-乙 (PEEK) 是一种高性能热塑性塑料,具有多种应用.
- 了解PEEK在各种条件下的机械行为对于其有效利用至关重要.
- 现有的模型可能无法完全捕捉PEEK在广泛的温度和延展率的复杂反应.
研究的目的:
- 描述PEEK的静态和动态单轴拉伸反应.
- 调查温度和拉伸率对PEEK机械性能的影响,包括屈服强度和弹性模量.
- 开发和验证一个修改后的构成模型,用于预测PEEK的前收益率行为.
主要方法:
- 试验性调查PEEK的拉伸反应在拉伸率从10-3s-1到200s-1和温度从23°C到110°C.
- 对收益强度和弹性模量对温度和拉伸率的依赖性的分析.
- 使用实验数据开发一个修改后的现象学Sherwood-Frost构成模型.
主要成果:
- 皮克的拉伸反应显著依赖于拉伸率和温度.
- 开发的修改后的谢伍德-弗罗斯特模型准确地描述了PEEK的产量前机械行为.
- 该模型有效地捕捉了PEEK在测试范围内的温度和延展率的反应.
结论:
- 修改后的谢尔伍德-弗罗斯特模型在不同条件下准确预测PEEK的前回收行为.
- 这种模型减少了对PEEK表征的广泛实验数据的需求.
- 该研究为设计和评估PEEK和复合结构提供了理论框架.
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