双相型不锈钢S22053循环本构关系研究

骆晶; 施刚; 毛灵涛; 郑云

doi:10.6052/j.issn.1000-4750.2020.09.0659

双相型不锈钢S22053循环本构关系研究

doi: 10.6052/j.issn.1000-4750.2020.09.0659

骆晶^1,,
施刚^2, ,,
毛灵涛^1,,
郑云^3,

1.
中国矿业大学(北京)力学与建筑工程学院，北京 100083
2.
清华大学土木工程安全与耐久教育部重点实验室，北京 100084
3.
中冶建筑研究总院有限公司，北京 100088

基金项目: 国家重点研发计划资助项目(2018YFC0705500，2018YFC0705501)

详细信息

作者简介:
骆　晶(1977−)，女，天津人，博士生，主要从事钢结构的研究(Email: lizzyluo@tsinghua.edu.cn)

毛灵涛(1974−)，男，新疆石河子人，教授，博士，博导，主要从事实验力学研究(E-mail: mlt@cumtb.edu.cn)

郑　云(1976−)，男，江西丰城人，教授级高工，博士，主要从事钢结构和组合结构研究(E-mail: 18811051632@139.com)

通讯作者:
施　刚(1977−)，男，安徽铜陵人，教授，博士，博导，主要从事钢结构的研究(Email: shigang@tsinghua.edu.cn)

中图分类号: TU391
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出版历程
- 收稿日期: 2020-09-14
- 修回日期: 2021-01-07
- 网络出版日期: 2021-01-26
- 刊出日期: 2021-09-13

CONSTITUTIVE RELATION OF DUPLEX STAINLESS STEEL S22053 UNDER CYCLIC LOADING

LUO Jing^1
,,
SHI Gang^{2
, ,},
MAO Ling-tao^1
,,
ZHENG Yun^3
,

1.
School of Mechanics & Civil Engineering, China University of Mining &Technology, Beijing 100083, China
2.
Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China
3.
Central Research Institute of Building and Construction CO., LTD. MCC, Beijing 100088, China

摘要

摘要: 为研究国产双相型不锈钢S22053在循环荷载下材料的力学性能和本构关系，该文采用S22053热轧钢板加工成母材试件，进行单调和循环加载试验，得到14种加载制度下的应力-应变曲线。基于单调加载试验曲线，分析了单调荷载下的材料性能；利用等应变幅加载试验曲线拟合了Chaboche混合强化参数，并用有限元软件ABAQUS对试验进行模拟计算，对比、验证了拟合效果。结果表明：双相型不锈钢S22053延性较好，没有明显的屈服平台和屈服点，比例极限较低；循环骨架曲线可以采用Ramberg-Osgood模型进行拟合；采用不同分量模型标定的3组混合强化参数均能较好的模拟材料的循环受力特征，其中三背应力分量模型(N2L1)拟合效果最好。研究结果可用于分析计算双相型不锈钢结构在地震作用下的受力性能。
- 钢结构 /
- 双相型不锈钢 /
- S22053 /
- 循环加载 /
- 本构关系 /
- Chaboche模型
Abstract: To study the mechanical properties and constitutive relation of DSS (duplex stainless steel) S22053 under cyclic loading, specimens machined from S22053 hot-rolled steel plate were tested under monotonic and cyclic loading patterns. Based on the monotonic curves, the material mechanical properties under monotonic load were analyzed. The material parameters of the Chaboche model were obtained using the results of the specimens with constant strain amplitude, and the test curves were simulated by the finite element software ABAQUS. The results reveal that DSS S22053 has good ductility and low proportional limit. No obvious yield platform or yield point was observed. The cyclic backbone curve can be well fitted with the Ramberg-Osgood model. The three types of combined parameters calibrated by different component models can simulate the hysteresis curve of materials well, and the three-back stress component model (N2L1) has the best fitting effect. The results can be used to analyze and calculate the mechanical performance of DSS structures under seismic load.
- steel structure /
- duplex stainless steel (DSS) /
- S22053 /
- cyclic loading /
- constitutive relationship /
- Chaboche model

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图 1 循环加载试件尺寸　/mm

Figure 1. Dimensions of coupons under cyclic loading

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图 2 试验加载装置

Figure 2. Test equipment

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图 3 试件破坏形式

Figure 3. Failure models of coupons

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图 4 S22053单调加载曲线

Figure 4. Monotonic curves of S22053

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图 5 S22053循环滞回曲线

Figure 5. Cyclic curves of S22053

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图 6 S22053循环峰值应力

Figure 6. Cyclic peak stress of S22053

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图 7 S22053循环骨架曲线

Figure 7. Cyclic backbone curves of S22053

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图 8 Chaboche混合强化模型

Figure 8. Chaboche combined hardening model

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图 9 单调荷载作用下有限元模拟曲线与试验曲线对比

Figure 9. Comparison between fitting curves and test curves under monotonic load

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图 10 循环荷载作用下有限元模拟曲线与试验曲线对比

Figure 10. Comparison between fitting curves and test curves under cyclic load

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图 11 N2L1模型拟合曲线与试验曲线对比

Figure 11. Comparison between fitting curves and test curves of N2L1 model

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表 1 双相型不锈钢S22053化学成分表 /(质量分数%)

Table 1. Chemical composition of DSS S22053 /(wt.%)

化学成分	C	Si	Mn	Cr	Ni	Mo
S22053	0.018	0.52	1.07	22.7	5.5	3.2
GB/T 20878−2007^[25]	0.030	1.00	2.00	22~23	4.5~6.5	3.0~3.5

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表 2 加载制度

Table 2. Loading spectrum

制度编号	加载制度说明
a-1	单调拉伸
a-2	单调压缩
a-3	拉压对称加载，从±0.2%以0.2%等应变增量逐级加载至±3.0%，先拉后压，每级循环1次
a-4	拉压对称加载，从±0.2%以0.2%等应变增量逐级加载至±3.0%，先拉后压，每级循环3次
a-5	以应变1%等幅拉压对称加载，先拉后压，循环10圈
a-6	以应变2%等幅拉压对称加载，先拉后压，循环10圈
a-7	以应变3%等幅拉压对称加载，先拉后压，循环6圈
a-8	拉压对称加载，从±3%以−0.2%等应变降幅逐级减小，先拉后压，每级循环1次
a-9	压应变固定为−0.4%，拉应变以0.2%等应变增量逐级加载至3%，先拉后压，每级循环1次
a-10	以拉应变1.0%为中心点，等应变增量0.2%逐级加载至拉应变达到3%
a-11	固定应变幅度为1.6%，从±0.8%开始，以0.2%为应变变化量逐级加载至拉应变达到3%
a-12	拉应变固定为0.4%，压应变以−0.2%等应变降幅逐级加载至−3%，先拉后压，每级循环1次
a-13	随机加载
a-14	随机加载

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表 3 试件单调力学性能

Table 3. monotonic mechanical properties of coupons

试件编号	E₀/MPa	σ_0.01/MPa	σ_0.2/MPa	ε_0.2/(%)	σ_u/MPa	ε_u/(%)	屈强比
a-1a	207 235	383	611	0.495	791	22.07	0.772
a-1b	237 694	363	649	0.473	834	23.42	0.778
a-2	233 450	312	579	0.448	−	−	−

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表 4 S22053主要循环强化参数

Table 4. Main cyclic hardening parameters of S22053

试件编号	循环强化系数K′/MPa	循环强化指数n′
a-3	1122.3	0.094
a-4	899.8	0.046
a-9	1149.7	0.102
a-10	1234.5	0.116
a-12	1176.2	0.106
平均值	1116.5	0.093

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表 5 S22053循环本构模型参数

Table 5. Cyclic constitutive model parameters of S22053

模型参数	N2L1	N4L0	N3L1
E₀/MPa	215 497	215 497	215 497
$ {\left.\sigma \right\|}_{0} {\rm{/MPa}}$	361	361	361
Q_∞/MPa	16.230	16.230	16.230
b	35.108	35.108	35.108
C₁/MPa	26 002	26 002	26 002
γ₁	144.5	153.6	142.4
C₂/MPa	184 221	184 221	184 221
γ₂	1066.4	987.1	973.5
C₃/MPa	2235	2235	2235
γ₃	0	510.2	548.8
C₄/MPa	−	1119	1119
γ₄	−	841.7	0

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表 6 Chaboche模型模拟效果对比

Table 6. Comparison of fitting effect of Chaboche models

试件编号	参数A/(%)			最优
试件编号	N2L1	N4L0	N3L1	最优
a-3	−1.191	1.750	1.538	N2L1
a-4	−0.089	2.665	2.675	N2L1
a-5	17.464	20.870	19.337	N2L1
a-6	−4.808	−1.753	−2.065	N4L0
a-7	−4.623	−1.909	−1.607	N3L1
a-8	−1.789	1.153	0.936	N3L1
a-9	1.452	4.366	3.428	N2L1
a-10	1.856	4.867	4.100	N2L1
a-11	10.338	12.463	11.339	N2L1
a-12	−1.029	1.369	0.654	N3L1
a-13	−5.149	−2.268	−2.713	N4L0
a-14	0.789	2.858	3.062	N2L1
$ \overline {\left\| A \right\|} $	4.215	4.858	4.454	N2L1

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