关于混凝土构成模型适用于钻孔模拟的研究
Jianxing Li1, Yize Liu1, Peiyu Li1
1State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.
Materials (Basel, Switzerland)
|November 27, 2024
概括
这项研究比较了四种用于穿孔模拟的混凝土构成模型. RHT和TCK模型最好地显示损伤,而KCC和HJC模型最好地预测剩余速度.
科学领域:
- 计算力学是计算力学.
- 材料科学是一种材料科学.
- 土木工程 土木工程是指土木工程.
背景情况:
- 精确模拟混凝土目标穿孔对于结构设计和安全至关重要.
- 现有的混凝土构成模型在预测复杂的故障机制方面表现不同.
- 了解不同模型的优点和弱点对于可靠的数值分析至关重要.
研究的目的:
- 评估和比较四种不同的混凝土构成模型 (HJC,RHT,KCC,TCK) 在模拟钢筋混凝土目标穿孔方面的有效性.
- 分析强度模型,损伤演变和延展率对模拟准确性的影响.
- 为选择合适的构成模型和参数提供指导,用于混凝土穿孔模拟.
主要方法:
- 使用LS-DYNA 11.0.0进行数值模拟.
- 分析了四个组成模型:霍尔姆奎斯特-约翰逊-库克 (HJC),兰迪H.R. (RHT),卡萨哈拉-奇巴-奇巴 (KCC) 和混凝土模型 (TCK).
- 基于混凝土损坏模式,侵蚀裂形成和弹子残留速度的评估.
主要成果:
- RHT和TCK模型有效地捕获了混凝土损坏和故障模式.
- KCC和HJC模型在预测投射弹的剩余速度方面表现出卓越的准确性.
- 发现侵蚀参数显著影响模拟结果.
结论:
- 建议使用RHT和TCK模型来模拟混凝土损坏和故障模式.
- KCC和HJC模型适用于预测弹子的剩余速度.
- 精心选择和校准侵蚀参数对于准确的混凝土穿孔模拟至关重要.
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