DP590高强钢/碳纤维复合层板制备及拉伸性能研究

复合材料科学与工程 ›› 2021, Vol. 0 ›› Issue (1): 78-84.

DP590高强钢/碳纤维复合层板制备及拉伸性能研究

胡海朝¹, 徐士新², 武晋^1*, 邓素怀², 王占辉¹, 毕彦¹

1.天津中德应用技术大学机械工程学院,天津300350;
2.首钢集团有限公司技术研究院,北京100043

收稿日期:2020-03-09 出版日期:2021-01-28 发布日期:2021-01-25
通讯作者: 武晋(1982-),男,副教授,硕士研究生,主要从事材料成型及控制工程方面的研究,wujin_0810@163.com。
作者简介:胡海朝(1986-),男,讲师,硕士研究生,主要从事复合材料成型工艺及制件可靠性方面的研究。
基金资助:
天津科技计划项目(19JCTPJC43700)

STUDY ON THE PREPARATION AND TENSILE PROPERTIES OF DP590 HIGH STRENGTH STEEL/CARBON FIBER COMPOSITE LAMINATES

HU Hai-chao¹, XU Shi-xin², WU Jin^1*, DENG Su-huai², WANG Zhan-hui¹, BI Yan¹

1. Tianjin Sino-German University of Applied Sciences, School of Materials Scienceand Engineering, Tianjin 300350, China;
2. Research Institute of Technology, Shougang Group Co., Ltd., Beijing 100043, China

Received:2020-03-09 Online:2021-01-28 Published:2021-01-25

摘要/Abstract

摘要： 采用模压成型工艺,以DP590钢板与碳纤维预浸料成功制备高强钢/碳纤维层板,针对其微观结构和拉伸性能进行了测试,研究了钢板表面粗糙度对层板拉伸强度的影响,并结合DP590高强钢拉伸性能特点与MVF理论提出了层合板拉伸强度预测公式。研究结果表明:所制备的层合板0°碳纤维层、90°碳纤维层、树脂基体、金属基体结合致密。金属基体与碳纤维层之间由树脂填充,起到了良好的粘结作用,微观结构基本无成型不良缺陷,所制备层合板的密度相比DP590高强钢降低达24%,具备明显的减重效果。说明模压成型工艺适用于高强钢/碳纤维复合层板的制备,该类材料具备较大的轻量化潜力。采用喷丸处理提高钢板表面粗糙度可以一定程度提升层合板强度,最大增幅达68 MPa,但钢板粗糙度与层合板平均拉伸强度呈明显的非线性关系。以MVF理论为基础,分别以高强钢抗拉强度、屈服强度、复合层板断裂时高强钢应力值对复合层板强度进行预测,结果发现最高预测误差分别为38.5%、12.8%、8.1%,说明采用塑性较高的金属制备金属/纤维复合层板类结构时,应用MVF理论进行预测应充分考虑金属塑性较高对预测误差的影响。采用复合层板断裂时对应的高强钢应力值代入MVF理论公式可获得更好的拉伸强度预测精度。

关键词: 模压成型, 高强钢, 复合层板, 拉伸强度, 预测

Abstract: The DP590 high strength steel/carbon fiber composite laminates was successfully prepared by press molding process, and its microstructure and tensile properties were tested. The influence of the surface roughness of steel plate on the tensile strength of laminates was studied. The formula for predicting the tensile strength of laminates was proposed based on the tensile properties of DP590 and MVF theory. The results show that the composite laminates are compact with 0° carbon fiber layer, 90° carbon fiber layer, resin matrix and metal matrix. The metal matrix and the carbon fiber layer are filled by resin, which plays a good role in bonding. The microstructure has very little molding defects. Compared with DP590 high-strength steel, the density of the prepared laminate is reduced by 24%, which has obvious weight reduction effect. It shows that the compression molding process is suitable for the preparation of high-strength steel/carbon fiber composite laminates, and this type of material has a large potential for light weighting. Shot peening to improve the surface roughness of steel plate can improve the strength of laminated plate to a certain extent, with a maximum increase of 68 MPa, but the relationship between the roughness of steel plate and the average tensile strength of laminated plate is obviously nonlinear. Based on the MVF theory, the strength of composite laminates are predicted by tensile strength, yield strength and stress value of high strength steel when laminates break. The results show that the highest prediction errors are 38.5%, 12.8% and 8.1%, respectively. It shows that the application of MVF theory in the prediction of metal fiber laminate structure with high plasticity should fully consider the high plasticity of metal for the influence of prediction error. By using the corresponding high-strength steel stress value when the composite laminate is broken and substituting it into the MVF theoretical formula, better prediction accuracy of tensile strength can be obtained.

Key words: compression molding, high strength steel, composite laminates, tensile strength, prediction

中图分类号:

TB332

胡海朝, 徐士新, 武晋, 邓素怀, 王占辉, 毕彦. DP590高强钢/碳纤维复合层板制备及拉伸性能研究[J]. 复合材料科学与工程, 2021, 0(1): 78-84.

HU Hai-chao, XU Shi-xin, WU Jin, DENG Su-huai, WANG Zhan-hui, BI Yan. STUDY ON THE PREPARATION AND TENSILE PROPERTIES OF DP590 HIGH STRENGTH STEEL/CARBON FIBER COMPOSITE LAMINATES[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(1): 78-84.

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