哈尔滨工程大学学报2011，Vol.32Issue(1)：21-25,5.DOI:10.3969/j.issn.1006-7043.2011.01.005
陶瓷相变增韧分析的新型屈服准则
A new yield criterion for analysis of ceramic phase transformation toughening
摘要
Abstract
To solve the problem of many holes and other defects which cause the difference between compressive strength and tensile strength in ceramic matrix composites, a parabolic-type yield criterion was obtained using a new parameter. Furthermore, based on an analogy with the associated flow rule in plastic material, a ceramic phasechange material constitutive equation was established. Under the plane strain condition, the theoretical toughening expressions of mode Ⅰ stationary cracks and steady-state growing cracks were derived by employing the weight function method. The crack toughening effect was also discussed while considering the influence of Poisson's ratio. The simulation results show that these phase transformation toughening effects created by the new yield calculating criterion are in agreement with experimental results and comparable to other yield criterions; they are in accord with the actual characteristics of ceramic materials. The results obtained provide theoretical support and reference for further research of ceramic phase transformation toughening.关键词
氧化锆陶瓷/屈服准则/本构模型/相变增韧Key words
zirconia ceramic/ yield criterion/ constitutive model/ phase transformation toughening分类
数理科学引用本文复制引用
王振清,杨增杰,唐立强..陶瓷相变增韧分析的新型屈服准则[J].哈尔滨工程大学学报,2011,32(1):21-25,5.基金项目
高等学校博士学科点专项基金资助项目(20060217010). （20060217010）
