Q235B钢动态本构及在LS-DYNA中的应用

支旭东; 张荣; 林莉; 范峰

doi:10.11883/bzycj-2016-0286

Q235B钢动态本构及在LS-DYNA中的应用

doi: 10.11883/bzycj-2016-0286

支旭东^{1, 2},
张荣^2, ,,
林莉³,
范峰^{1, 2}

1.
哈尔滨工业大学结构工程灾变与控制教育部重点实验室, 黑龙江哈尔滨 150090
2.
哈尔滨工业大学土木工程学院, 黑龙江哈尔滨 150090
3.
哈尔滨理工大学建筑工程学院土木工程系, 黑龙江哈尔滨 150080

基金项目:

国家自然基金面上项目 51478144

国家杰出青年科学基金项目 51525802

详细信息

作者简介:
支旭东(1977-), 男, 博士, 博导

通讯作者:
张荣, zhangrong6636747@163.com

中图分类号: O347.3
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- 被引次数: 0
出版历程
- 收稿日期: 2016-09-20
- 修回日期: 2017-02-14
- 刊出日期: 2018-05-25

Dynamic constitutive model of Q235B steel and its application in LS-DYNA

ZHI Xudong^{1, 2},
ZHANG Rong^{2
, ,},
LIN Li³,
FAN Feng^{1, 2}

1.
Key Lab of Structures Dynamic Behavior and Control, Ministry of Education, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China
2.
School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China
3.
College of Civil Engineering and Architecture, Harbin University of Science and Technology, Harbin 150080, Heilongjiang, China

摘要

摘要: 采用万能材料试验机和分离式霍普金森拉杆（SHTB）装置，对我国钢结构建筑中最常用的Q235B钢进行准静态拉伸实验、高温拉伸实验和动态拉伸实验。基于实验数据对LS-DYNA常用的3种动态材料模型Cowper-Symonds本构模型、Johnson-Cook本构模型、Zerilli-Armstrong本构模型进行了拟合，通过Taylor杆实验对3种本构模型进行验证和对比分析。结果表明：Q235B钢具有较为明显的高温软化和应变率强化效应；Cowper-Symonds本构模型可以较好地适用于工程领域低速碰撞的模拟；Johnson-Cook本构模型可适用于较大应变率范围内的模拟；不推荐Zerilli-Armstrong本构模型在工程低速碰撞领域中使用。
- 动态本构模型 /
- Q235B钢 /
- 应变率效应 /
- Taylor杆
Abstract: In this work we conducted a quasi-static tensile test, a high temperature tensile test and a dynamic tensile test on Q235B steel, the most widely used in steel structures in China, using a multi-functional material testing machine and a split Hopkinson tension bar (SHTB) and, based on the test data obtained, fitted three frequently used material models, i.e. the Cowper-Symonds model, the Johnson-Cook model and the Zerilli-Armstrong model, in LS-DYNA. We then verified their validity by conducting Taylor impact tests. The results showed that Q235B steel was temperature and strain-rate sensitive, that the Cowper-Symonds model was applicable in low velocity impact simulations, that the Johnson-Cook model was suitable for simulations with a wider range of strain-rates, and that the Zerilli-Armstrong model was not recommendable for low velocity impact simulation.
- dynamic constitutive model /
- Q235B steel /
- strain-rate effect /
- Taylor bar

HTML全文

图 1 试件形状和尺寸(单位：mm)

Figure 1. Geometry and dimensions of specimens(unit: mm)

下载: 全尺寸图片幻灯片

图 2 不同工况下拉伸原试件及破坏后试件

Figure 2. Original and fractured conditions of specimens

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图 3 不同应变率下Q235B钢的真实应力应变曲线

Figure 3. True stress-true strain curves of Q235B steel at different strain-rates

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图 4 不同温度下Q235B钢的拉伸实验真实应力应变曲线

Figure 4. True stress-true strain curves of Q235B steel at different temperatures

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图 5 3种本构方程拟合结果

Figure 5. Fitted results of three constitutive functions

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图 6 Taylor杆实验与数值模拟形态对比

Figure 6. Appearances as compared between simulationand Taylor test results

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图 7 子弹应变率随速度变化曲线

Figure 7. Strain-rate curves of projectile at different impact velocity

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图 8 试件尺寸说明

Figure 8. Dimensions of specimens

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表 1 Taylor杆数值模拟与实验对比

Table 1. Parameters as compared between simulation and Taylor test results

撞击速度v₀/(m·s^-1)	Taylor杆实验			数值模拟				误差/%
撞击速度v₀/(m·s^-1)	L_F/mm	D_F/mm	变形模式	本构模型	L_F/mm	D_F/mm	变形模式	L_F	D_F
				C-S	48.2	15.9	镦粗	-0.8	5.3
122.0	47.8	16.8	镦粗	J-C	48.3	15.0	镦粗	-1.0	10.7
				Z-A	48.8	14.9	镦粗	-2.0	11.3
				C-S	47.4	15.8	镦粗	-1.2	4.8
153.5	46.8	16.6	镦粗	J-C	47.5	15.7	镦粗	-1.5	5.4
				Z-A	47.9	15.2	镦粗	-2.3	8.4
				C-S	45.1	17.4	镦粗	-4.6	13.0
225.0	43.1	20.0	镦粗	J-C	44.8	18.4	开裂	-3.9	8.0
				Z-A	45.3	17.2	镦粗	-5.1	14.0
				C-S	43.4	19.6	开裂	-2.1	12.1
242.5	42.7	22.3	开裂	J-C	43.5	20.9	开裂	-1.9	6.3
				Z-A	43.3	19.9	开裂	-1.4	10.8
				C-S	40.3	23.1	开裂	-7.9	11.4
279.0	38.9	26.1	开裂	J-C	40.0	24.1	开裂	-2.8	7.6
				Z-A	40.4	23.6	开裂	-3.8	9.6
				C-S	39.9	23.7	开裂	-3.6	11.5
290.0	38.5	26.8	开裂	J-C	39.2	24.5	开裂	-1.8	8.6
				Z-A	39.3	23.8	开裂	-2.1	11.1

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