孙庆,杨延清,罗贤,张荣军,黄斌,薛春岭.采用顶出方法研究纤维增强钛基复合材料的界面断裂韧性[J].稀有金属材料与工程,2017,46(10):2794~2800.[Sun Qing,Yang Yan Qing,Luo Xian,Zhang Rong Jun,Huang Bin,Xue Chun Ling.Study on the Interfacial Fracture Toughness of Fiber Reinforced Titanium Matrix Composites by Push out Test[J].Rare Metal Materials and Engineering,2017,46(10):2794~2800.]
采用顶出方法研究纤维增强钛基复合材料的界面断裂韧性
投稿时间:2015-11-23  修订日期:2016-08-31
中文关键词:  钛基复合材料  界面断裂韧性  顶出试验  剪滞方法
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      为了估计单向SiC纤维增强钛基复合材料的界面断裂韧性GIIc,本文提出了一个关于单根纤维顶出试验的新模型,在本模型中,界面脱粘开始于试样的底端面。本文以断裂力学为基础推导出了GIIc 的理论公式,并且讨论了几个关键因素对GIIc的影响,如裂纹扩展所需的外加应力,裂纹长度以及界面的摩擦剪切应力。并且运用此模型预测了复合材料 Sigma1240/Ti-6-4, SCS/Ti-6-4, SCS/Timetal 834 and SCS/Timetal 21s 的界面断裂韧性,并与以前的有限元结果进行了比较。结果显示,对于脱粘起始于试样的底端面的顶出试验,本模型能较可靠地预测钛基复合材料的界面断裂韧性。
Study on the Interfacial Fracture Toughness of Fiber Reinforced Titanium Matrix Composites by Push out Test
英文关键词:Titanium matrix composites (TMCs)  Interfacial Fracture toughness  Push-out test  shear-lag approach
英文摘要:
      The model for single fiber push-out test is developed to evaluate the fracture toughness GIIc of the fiber/matrix interface in titanium alloys reinforced by SiC monofilaments. Theoretical solution to GIIc is obtained from fracture mechanics, and the effects of several key factors such as the applied stress needed for crack advance, crack length, and interfacial frictional shear stress are discussed. The predictions by the model are compared with the previous finite element analysis results for the interfacial toughness of the composites including Sigma1240/Ti-6-4, SCS/Ti-6-4, SCS/Timetal 834 and SCS/Timetal 21s. The results show that the model can reliably predict the interfacial toughness of the titanium matrix composites, in which interfacial debonding usually occurs at the bottom of the samples.
作者单位E-mail
孙庆 西北工业大学 凝固技术国家重点实验室 clz050804@126.com 
杨延清 西北工业大学 凝固技术国家重点实验室 sunq2009@126.com 
罗贤 西北工业大学 凝固技术国家重点实验室  
张荣军 西北工业大学 凝固技术国家重点实验室  
黄斌 西北工业大学 凝固技术国家重点实验室  
薛春岭 西北工业大学 凝固技术国家重点实验室  
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