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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(英文),2017,46(10):2794~2800.[Sun Qing,Yang Yan Qing,Luo Xian,Zhang Rong Jun,Huang Bin and 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.]
Study on the Interfacial Fracture Toughness of Fiber Reinforced Titanium Matrix Composites by Push out Test
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Received:November 23, 2015  Revised:August 31, 2016
DOI:
Key words: Titanium matrix composites (TMCs)  Interfacial Fracture toughness  Push-out test  shear-lag approach
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
Sun Qing,Yang Yan Qing,Luo Xian,Zhang Rong Jun,Huang Bin and Xue Chun Ling  
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Abstract:
      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.
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