Determination of forming procedure by numerical analysis and investigation of mechanical properties of steel/CFRP hybrid composites with complicated shapes

Lee Min-sik; Kang Chung-gil

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Determination of forming procedure by numerical analysis and investigation of mechanical properties of steel/CFRP hybrid composites with complicated shapes

机译：数值分析确定形状复杂的钢/ CFRP混杂复合材料的力学性能并确定成形工艺

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In this study, a hybrid composite material was fabricated by stacking carbon fiber-reinforced plastic onto CR420 plates to increase the specific strength and stiffness relative to those of thick boron steel plates and dual-phase steels. Simulations were first used to compare and evaluate the abilities of two forming processes to manufacture appropriate center-pillar reinforcements. After determining the best process, a die was prepared using computer aided engineering (CAE), and a center-pillar reinforcement was formed with a carbon fiber-reinforced plastic (CFRP)/CR420 hybrid composite. The differences in the mechanical properties of the specimens were investigated according to their position using simulations. The specimen thicknesses in the experiment and simulation were compared. Positions where the contact pressure was low could be found in the simulation. Further, the reasons for the deterioration of the mechanical properties were elucidated by observing the micro-structure. Large quantities of voids with a size greater than 50 mu m were found in those specimens that had a contact pressure lower than 0.5 MPa. The results obtained confirm that large quantities of voids cause the mechanical properties of CFRP composites to deteriorate. (C) 2016 Published by Elsevier Ltd.

机译：在这项研究中，通过将碳纤维增强塑料堆叠到CR420板上来制造杂化复合材料，以相对于厚硼钢板和双相钢增加比强度和刚度。首先使用模拟来比较和评估两种成型工艺制造合适的中心支柱钢筋的能力。确定最佳工艺后，使用计算机辅助工程（CAE）准备模具，并使用碳纤维增强塑料（CFRP）/ CR420混合复合材料形成中心支柱增强件。使用模拟根据样品的位置研究了样品力学性能的差异。比较了实验和模拟中的样品厚度。在模拟中可以找到接触压力低的位置。此外，通过观察微观结构来阐明机械性能劣化的原因。在接触压力低于0.5 MPa的那些样品中发现了大量尺寸大于50微米的空隙。所获得的结果证实，大量的空隙会导致CFRP复合材料的机械性能下降。（C）2016由Elsevier Ltd.出版

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来源
《Composite Structures》 |2017年第3期|118-129|共12页
作者
Lee Min-sik; Kang Chung-gil;
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作者单位

Pusan Natl Univ, Sch Mech Engn, Pusan 609735, South Korea;

Pusan Natl Univ, Sch Mech Engn, Pusan 609735, South Korea;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
CFRP; Void; Mechanical properties; Process simulation; Contact pressure;

机译：CFRP;空隙;力学性能;工艺模拟;接触压力;

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机译：钢-CFRP混合复合材料的制造和力学性能
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4. Computer-aided Investigation of Mechanical Properties for Integrated Casting and Rolling Processes Using Hybrid Numerical-analytical model of Mushy Steel deformation [C] . Miroslaw Glowacki, Marcin Hojny International Conference on Advanced Engineering Computing and Applications in Sciences . 2012

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机译：对具有新颖的三维纳米结构的碳纳米管和基于纳米管的纳米复合材料的有效力学性能和性能的分析，数值和实验研究。
6. Mechanical Properties of Hybrid Ultra-High Performance Engineered Cementitous Composites Incorporating Steel and Polyethylene Fibers [O] . Yingwu Zhou, Bin Xi, Kequan Yu, 2018

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7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。

Determination of forming procedure by numerical analysis and investigation of mechanical properties of steel/CFRP hybrid composites with complicated shapes

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