A508-Ⅲ钢小尺寸样品拉伸行为的有限元辅助测试方法研究

李逸涵; 李帅; 黎军顽; 忻胜民; 宁广胜; 钟巍华; 杨文

doi:10.13832/j.jnpe.2024.01.0115

A508-Ⅲ钢小尺寸样品拉伸行为的有限元辅助测试方法研究

doi: 10.13832/j.jnpe.2024.01.0115

1.
上海大学材料科学与工程学院，上海，200444
2.
中国原子能科学研究院反应堆工程技术研究所，北京，102413

基金项目: 大型先进压水堆核电站重大专项资助项目(2018ZX06002008)

详细信息

作者简介:
李逸涵（1997—），男，硕士研究生，现主要从事反应堆压力容器材料的力学性能分析方面的研究，E-mail: liyihan_shu@163.com

通讯作者:
黎军顽，E-mail: lijunwan@shu.edu.cn

中图分类号: TL341
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- 文章访问数: 120
- HTML全文浏览量: 35
- PDF下载量: 21
- 被引次数: 0
出版历程
- 收稿日期: 2023-03-07
- 修回日期: 2023-08-20
- 刊出日期: 2024-02-15

Study on Tensile Behavior of Small Size Specimen of A508-III Steel Based on Finite Element Aided Testing Method

1.
School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
2.
Division of Reactor Engineering Technology Research, China Institute of Atomic Energy, Beijing, 102413, China

摘要

摘要: 为了克服拉伸样品尺寸减小所带来的尺寸效应的影响，本文对A508-Ⅲ钢小尺寸样品的拉伸行为进行了研究。通过改变A508-Ⅲ钢的热处理温度制备了不同晶粒尺寸和样品厚度的小尺寸样品，进行了小尺寸样品的室温拉伸测试，分析了晶粒尺寸和样品厚度对小尺寸样品拉伸力学性能的影响，并揭示了其潜在的拉伸尺寸效应机理。结果表明，由于小尺寸样品厚度和晶粒尺寸的变化，导致其拉伸力学性能表现出明显的尺寸效应；通过引入综合表征样品特征尺寸和晶粒尺寸效应的影响参数，构建了考虑尺寸效应的Swift力学本构模型；采用有限元辅助测试方法确定了小尺寸样品的延性损伤演变参数，数值与实验结果误差小于3%；基于建立的力学本构模型，利用有限元方法预测了小尺寸样品的拉伸力学性能，构建了其屈服强度与抗拉强度的归一化模型，以期为小尺寸样品的工程应用提供借鉴。
- A508-Ⅲ钢 /
- 小尺寸样品 /
- 尺寸效应 /
- 归一化模型
Abstract: In order to overcome the influence of size effect brought about by the reduction in the size of tensile specimen, the tensile properties have been investigated for small size specimens of A508-III steel in this paper. The small size specimens of A508-III steel with varying grain sizes and specimen thicknesses were prepared by altering the heat treatment temperature, and their tensile tests were conducted at room temperature. The effects of grain size and thickness on the tensile mechanical properties of small size specimens were analyzed and the underlying mechanism of the potential tensile size effect was revealed. The results indicate that, due to the changes in the thickness and grain size of small size specimens, the tensile mechanical property exhibits an obvious size effect. A Swift mechanical constitutive model considering size effects was developed by introducing influence parameters that comprehensively characterize the specimen feature size and grain size effects. The ductile damage evolution parameters of the specimens were determined using the finite element aided testing (FAT) method, and the error between numerical and experimental results was less than 3%. Based on the established mechanical constitutive model, the tensile mechanical properties of the small size specimens were predicted using the finite element method, and the normalized models of their yield strength and tensile strength were constructed, so as to provide reference for the engineering application of small size specimens.
- A508-Ⅲ steel /
- Small size specimens /
- Size effect /
- Normalization model

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图 1 不同热处理温度下A508-Ⅲ钢的晶粒尺寸

Figure 1. Grain Size of A508-Ⅲ Steel under Different Heat Treatment Temperatures

下载: 全尺寸图片幻灯片

图 2 不同规格的拉伸试样

Figure 2. Tensile Specimens with Different Specifications

下载: 全尺寸图片幻灯片

图 3 不同热处理温度和厚度SS-J小尺寸样品的工程应力-应变曲线

Figure 3. Engineering Stress-strain Curves of SS-J Specimens with Different Thicknesses under Different Heat Treatment Temperatures

下载: 全尺寸图片幻灯片

图 4 不同热处理温度和厚度SS-J小尺寸样品的拉伸断口形貌　　　　　　

Figure 4. Tensile Fracture Surface Morphology of SS-J Specimens with Different Heat Treatment Temperatures and Thicknesses

下载: 全尺寸图片幻灯片

图 5 SS-J小尺寸样品拉伸过程的有限元模型

Figure 5. Finite Element Model of the Tensile Process for SS-J Specimens

下载: 全尺寸图片幻灯片

图 6 实验与FAT方法获得的SS-J小尺寸样品的拉伸载荷-位移曲线

Figure 6. Force-Displacement Curves of SS-J Specimens Obtained by Experiment and FAT Method

下载: 全尺寸图片幻灯片

图 7 SS-J小尺寸样品的延性损伤演变参数

Figure 7. Ductile Damage Evolution Parameter of SS-J Specimens　　　　　　

下载: 全尺寸图片幻灯片

图 8 FAT方法与真实实验获得的小尺寸样品的拉伸断口

Figure 8. Tensile Fracture Surfaces of the Small Size Specimen from FAT Method and Real Experiment

下载: 全尺寸图片幻灯片

图 9 SS-J小尺寸样品的归一化模型

Figure 9. Normalization Models of SS-J Specimens

下载: 全尺寸图片幻灯片

表 1 A508-Ⅲ钢的化学成分

Table 1. Chemical Composition of A508-III Steel

元素	C	Si	Mn	Cr	Mo	Ni	V	Al	N	P	S	Fe
质量分数/%	0.175	0.205	1.59	0.137	0.482	0.731	0.002	0.011	0.012	0.005	0.003	余量

下载: 导出CSV

表 2 实验获得的不同热处理温度和厚度SS-J小尺寸样品的拉伸力学性能　　　　　　

Table 2. Tensile Mechanical Properties of SS-J Specimens with Different Heat Treatment Temperatures and Thicknesses obtained from Experiments

温度/ ℃	厚度/ mm	弹性模量/GPa	屈服强度/MPa	抗拉强度/MPa	均匀延伸率/%	总延伸率/%
900	0.30	123	618	696	6.2	11.0
	0.50	125	626	714	6.9	14.8
	0.75	122	639	729	6.6	17.5
950	0.30	144	584	692	6.7	11.1
	0.50	142	600	707	7.2	15.0
	0.75	149	612	717	7.0	17.6
1000	0.30	141	562	672	6.3	11.2
	0.50	141	596	698	7.4	13.3
	0.75	148	608	712	7.3	17.9

下载: 导出CSV

表 3 不同热处理温度和厚度SS-J小尺寸样品的尺寸效应参数λ值

Table 3. λ Value of SS-J Specimens with Different Heat Treatment Temperatures and Thicknesses

小尺寸样品	900℃			950℃			1000℃
小尺寸样品	0.30 mm	0.50 mm	0.75 mm	0.30 mm	0.50 mm	0.75 mm	0.30 mm	0.50 mm	0.75 mm
λ /mm^-2	481.97	334.81	261.22	426.22	296.08	231.01	262.97	182.68	142.53

下载: 导出CSV

表 4 不同热处理温度下考虑小尺寸样品尺寸效应的Swift力学本构模型参数

Table 4. Swift Model Parameters Considering Size Effect of SS-J Specimens under Different Heat Treatment Temperatures

热处理温度/℃	a	b	c	n	ε₀
900	330.40	18.80	117839.20	0.1073	0.0045
950	332.80	20.10	105342.60	0.1146	0.0045
1000	328.80	25.00	64044.00	0.1145	0.0045

下载: 导出CSV

表 5 有限元方法获得的不同热处理温度和厚度SS-J小尺寸样品的拉伸力学性能

Table 5. Tensile Mechanical Properties of SS-J Specimens with Different Heat Treatment Temperatures and Thicknesses from Finite Element Method

温度/ ℃	厚度/ mm	弹性模量/GPa	屈服强度/MPa	抗拉强度/MPa	均匀延伸率/%	总延伸率/%
900	0.20	115	612	687	6.5	12.5
	0.40	108	608	701	7.7	14.4
	0.60	101	625	730	7.6	18.5
950	0.20	160	539	675	6.9	13.2
	0.40	137	581	680	7.9	15.4
	0.60	142	611	716	7.8	18.6
1000	0.20	102	520	621	7.1	13.1
	0.40	130	563	674	8.2	15.5
	0.60	136	593	695	7.2	19.0

下载: 导出CSV

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