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考虑材料高温蠕变的螺纹副轴向承载分布规律

何联格 张斌 郑建军 周蓝 苏建强 石文军

何联格, 张斌, 郑建军, 周蓝, 苏建强, 石文军. 考虑材料高温蠕变的螺纹副轴向承载分布规律[J]. 西南交通大学学报, 2022, 57(5): 1024-1031. doi: 10.3969/j.issn.0258-2724.20200417
引用本文: 何联格, 张斌, 郑建军, 周蓝, 苏建强, 石文军. 考虑材料高温蠕变的螺纹副轴向承载分布规律[J]. 西南交通大学学报, 2022, 57(5): 1024-1031. doi: 10.3969/j.issn.0258-2724.20200417
HE Liange, ZHANG Bin, ZHENG Jianjun, ZHOU Lan, SU Jianqiang, SHI Wenjun. Axial Load Distribution Law of High Temperature Thread Pair Considering Material Creep[J]. Journal of Southwest Jiaotong University, 2022, 57(5): 1024-1031. doi: 10.3969/j.issn.0258-2724.20200417
Citation: HE Liange, ZHANG Bin, ZHENG Jianjun, ZHOU Lan, SU Jianqiang, SHI Wenjun. Axial Load Distribution Law of High Temperature Thread Pair Considering Material Creep[J]. Journal of Southwest Jiaotong University, 2022, 57(5): 1024-1031. doi: 10.3969/j.issn.0258-2724.20200417

考虑材料高温蠕变的螺纹副轴向承载分布规律

doi: 10.3969/j.issn.0258-2724.20200417
基金项目: 中国博士后科学基金(2019M663443);重庆市自然科学基金(cstc2021jcyj-msxmX0440);重庆市教育委员会科学技术研究计划(KJQN201901113)
详细信息
    作者简介:

    何联格(1984—),男,讲师,博士,研究方向为动力系统结构可靠性,E-mail:heliange@cqut.edu.cn

  • 中图分类号: TH131.3

Axial Load Distribution Law of High Temperature Thread Pair Considering Material Creep

  • 摘要:

    为了研究高温蠕变对螺纹副承载的影响,分别在常温、250、300、350 ℃下对铝合金试样进行单轴拉伸蠕变试验,通过试验数据拟合得到不同温度下铝合金的时间硬化蠕变模型参数;基于ABAQUS建立螺纹副承载分布有限元模型,描述螺栓连接组合结构在高温环境下的工作情况,研究螺纹副材料在线弹性、塑性、蠕变情况下的承载分布. 结果表明:螺栓连接组合结构在高温环境下工作时,被连接件铝合金材料发生蠕变,导致螺纹副1号螺纹牙受轴向载荷大幅减少;考虑材料线弹性后,1号螺纹牙承载比例为22.88%~23.15%;考虑材料塑性后,1号螺纹牙承载比例为20.80%~20.95%;考虑材料蠕变后,1号螺纹牙承载比例为20.65%~21.02%;考虑材料塑性和蠕变后,1号螺纹牙承载比例有所降低,所有螺纹牙所受轴向载荷趋于平均.

     

  • 图 1  螺栓连接组合结构

    Figure 1.  Bolt connection structure

    图 2  高温蠕变试件

    Figure 2.  Test specimen of high temperature creep

    图 3  铝合金材料蠕变曲线

    Figure 3.  Creep curves of aluminum alloy material

    图 4  螺栓连接组合结构有限元模型

    Figure 4.  Finite element model of bolted connection structure

    图 5  材料应力-应变曲线

    Figure 5.  Stress-strain curves of materials

    图 6  螺栓连接组合结构Mises应力云图

    Figure 6.  Mises stress nephogram of bolted connection structure

    图 7  250 ℃下螺栓连接组合结构应变云图

    Figure 7.  Strain nephogram of bolted connection structure at 250 ℃

    图 8  不同温度下螺纹副承载分布

    Figure 8.  Thread pair load distribution at different temperatures

    表  1  Time-hardening蠕变模型材料参数

    Table  1.   Material parameters of time-hardening creep model

    温度/℃Amn
    2501.935 × 10−9−5.380 × 10−140.962
    3001.714 × 10−8−2.617 × 10−150.034
    3503.884 × 10−6−0.6282.593 × 10−8
    下载: 导出CSV

    表  2  铝合金材料属性

    Table  2.   Material properties of aluminum alloy

    温度/℃弹性模量/GPa泊松比线膨胀系数/(× 10−5−1
    常温730.312.05
    250650.292.25
    300620.292.55
    350590.292.85
    下载: 导出CSV

    表  3  方差和极差分析结果

    Table  3.   Results of variance and range analysis

    温度/℃阶段方差极差
    常温弹性0.001 8470.120 5
    塑性0.001 0920.090 1
    弹性0.001 6820.114 5
    250塑性0.001 0110.085 9
    蠕变0.000 7400.070 3
    弹性0.001 6250.112 2
    300塑性0.000 9810.084 1
    蠕变0.001 0170.085 1
    弹性0.001 5570.109 7
    350塑性0.000 9520.082 5
    蠕变0.001 0530.085 7
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-07-07
  • 修回日期:  2020-11-23
  • 网络出版日期:  2022-09-21
  • 刊出日期:  2020-11-25

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