10CrNiMo结构钢低周疲劳过程中的应变滞后特性

张亚军

张亚军. 10CrNiMo结构钢低周疲劳过程中的应变滞后特性[J]. 材料开发与应用, 2017, 32(6): 8-12. DOI: 10.19515/j.cnki.1003-1545.2017.06.003
引用本文: 张亚军. 10CrNiMo结构钢低周疲劳过程中的应变滞后特性[J]. 材料开发与应用, 2017, 32(6): 8-12. DOI: 10.19515/j.cnki.1003-1545.2017.06.003
ZHANG Yajun. Strain Hysteresis Characteristic in the Course of Low Cycle Fatigue for 10CrNiMo Structural Steel[J]. Development and Application of Materials, 2017, 32(6): 8-12. DOI: 10.19515/j.cnki.1003-1545.2017.06.003
Citation: ZHANG Yajun. Strain Hysteresis Characteristic in the Course of Low Cycle Fatigue for 10CrNiMo Structural Steel[J]. Development and Application of Materials, 2017, 32(6): 8-12. DOI: 10.19515/j.cnki.1003-1545.2017.06.003

10CrNiMo结构钢低周疲劳过程中的应变滞后特性

详细信息
    作者简介:

    张亚军,男,1972年生,高级工程师,主要从事金属材料的疲劳、断裂与损伤性能及其测试技术研究;E-mail:zhangyj309@163.com

  • 中图分类号: V216.3

Strain Hysteresis Characteristic in the Course of Low Cycle Fatigue for 10CrNiMo Structural Steel

  • 摘要: 在6级轴向逐级增加的系列恒应变幅(0.3%~1.0%)控制下,室温空气中,采用光滑圆形横截面试样,研究了10CrNiMo结构钢在低周疲劳作用下的应力-总应变及应力-塑性应变的滞后回线特性。结果表明:在小应变幅(0.3%0.4%)控制下,虽然弹性应变占绝对优势,但塑性应变并不为零,且逐级增长;而在大应变幅(0.6%~1.0%)控制下,塑性应变增长较快,并逐渐占主导地位。无论应变幅大小,只须几个循环,材料便进入稳定状态,而初始循环与失稳循环却表现出不稳定的特征。
    Abstract: Characteristics of hysteresis loops of stress-strain (total) and stress-strain (plastic) under low cycle fatigue action for 10 Cr Ni Mo structural steel were studied by taking smooth rounded cross-section specimens, in air and at room temperature, under the control of six series of different axial strain amplitudes ranging from 0. 3% to 1. 0%. The results manifested that although elastic strain is entirely dominant, plastic strain is not zero and increases gradually, under the control of the small strain amplitudes from 0. 3% to 0. 4%; plastic strain increases fast and plays a leading role gradually, under the control of the big strain amplitudes from 0. 6% to 1. 0%; the test material will get into a stable state acted only by several cycles despite of the strain amplitudes, and the first cycle and the last one indicate unsteady features.
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出版历程
  • 收稿日期:  2017-07-19
  • 网络出版日期:  2024-03-18
  • 刊出日期:  2017-12-24

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