A novel and convenient temperature dependent fracture strength model for the laminated ultra-high temperature ceramic composites

JOURNAL OF ALLOYS AND COMPOUNDS

卷:771

Article

Wang, Ruzhuan¹  Li, Dingyu²  Wang, Xiaorong²  Li, Weiguo³ 

[1] Chongqing Univ Sci & Technol, Sch Met & Mat Engn, Chongqing Key Lab Nano Micro Composite Mat & Devi, Chongqing 401331, Peoples R China

[2] Chongqing Univ Sci & Technol, Sch Math & Sci, Chongqing 401331, Peoples R China

[3] Chongqing Univ, Coll Aerosp Engn, Chongqing 400030, Peoples R China

关键词: Ceramics;    Composite materials;    Mechanical properties;    Microstructure;   

DOI  :  10.1016/j.jallcom.2018.08.253

来源: Elsevier

【 摘 要 】

At present, no suitable and convenient model has been developed to predict variation tendencies of fracture strength of laminated ceramic composites with temperature. In this paper, a novel and quite simple temperature dependent fracture strength model for the laminated ultra-high temperature ceramic composites was developed based on energy theoriese-the Griffith energy criterion and a concept of energy storage capacity. The complicated problems of characterization of combined effects of temperature, change in critical flaw size and laminated structure parameters on fracture strength are solved by using primary and simple method. The model prediction agreed well with the experimental value. The novel model can be used to determine both fracture strength and change in critical flaw size of laminated composite at elevated temperature. It should be noted that the model has no any fitting parameter, which is an easy-to-use method for the engineering. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

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