第2期 马向平等：金属陶瓷在高温下的变形规律 .225. [⑧]罗守靖，程远胜，杜之明，等.陶瓷基复合材料伪半固态触变 [11]李海燕，聂景旭，粘塑性损伤统一本构模型中材料常数的一 成形.中国有色金属学报，2004,8(4)：1286 种确定方法.航空动力学报，2003,18(3)：388 [9]Schiavon M A.Radovanovic E.Yoshida I V P.Microstructural [12]Huber N,Tsakmakis C.A neural network tool for identifying characterization of monolithic ceramic matrix composites from the material parameters of a finite deformation viscoplasticity polysiloxane and SiC powder.Powder Technol.2002.123:232 model with static recovery.Comput Methods Appl Mechd Eng, [10]潘洪平.半固态合金触变成形的实验研究[博士后研究报 2001,192:353 告]北京：北京有色金属研究总院，2002,20 Deformation rule of cermets at high temperature MA Xiangping,WANG Shuyi,CHEN Wei,LUO Qingguo Department of Mechanical Enginering,Academy of Armored Forces Enginering.Beijing 100072.China ABSTRACI The signification of using heat insulation technology in a military armored vehicle was discussed. The difficulties and key problems of heat insulation technology in an engine were also analyzed.Based on the semisolid processing theory,material property research method and analogy testing method,hot simulation ex- periments were carried out to study the distortion rule and quality of cermets,such as TiC Ni,at high tempera- ture.The broken mechanism of cermets at high temperature was explored.The experimental and research re- sults indicate that nonelasticity strain associate with time in nature according to constitutive equations of the classical elastic plastic and creep theory.Non-elasticity strain should be expressed by uniform method for it is controlled by the single mechanism.Namely,it should be disposed by elastic viscoplasticity constitutive equa- tions which associate with plastic strain and creep strain.The mathematical model which can reflect the distor- tion character of cermets at high temperature was established by multiple regression analysis based on hot simula tion experiment data,and statistical test of the mathematical model revealed that the mathematical model is rea- sonable. KEY WORDS cermets:heat simulation experiment;constitutive equations;multiple regression;engine［8］ 罗守靖‚程远胜‚杜之明‚等．陶瓷基复合材料伪半固态触变 成形．中国有色金属学报‚2004‚8（4）：1286 ［9］ Schiavon M A‚Radovanovic E‚Yoshida I V P．Microstructural characterization of monolithic ceramic matrix composites from polysiloxane and SiC powder．Powder Technol‚2002‚123：232 ［10］ 潘洪平．半固态合金触变成形的实验研究 ［博士后研究报 告］．北京：北京有色金属研究总院‚2002：20 ［11］ 李海燕‚聂景旭．粘塑性损伤统一本构模型中材料常数的一 种确定方法．航空动力学报‚2003‚18（3）：388 ［12］ Huber N‚Tsakmakis C．A neural network tool for identifying the material parameters of a finite deformation viscoplasticity model with static recovery．Comput Methods Appl Mechd Eng‚ 2001‚192：353 Deformation rule of cermets at high temperature MA Xiangping‚WA NG Shuyi‚CHEN Wei‚LUO Qingguo Department of Mechanical Enginering‚Academy of Armored Forces Enginering‚Beijing100072‚China ABSTRACT The signification of using heat insulation technology in a military armored vehicle was discussed． The difficulties and key problems of heat insulation technology in an engine were also analyzed．Based on the semisolid processing theory‚material property research method and analogy testing method‚hot simulation ex￾periments were carried out to study the distortion rule and quality of cermets‚such as TiC－Ni‚at high tempera￾ture．The broken mechanism of cermets at high temperature was explored．The experimental and research re￾sults indicate that non-elasticity strain associate with time in nature according to constitutive equations of the classical elastic-plastic and creep theory．Non-elasticity strain should be expressed by uniform method for it is controlled by the single mechanism．Namely‚it should be disposed by elastic-viscoplasticity constitutive equa￾tions which associate with plastic strain and creep strain．The mathematical model which can reflect the distor￾tion character of cermets at high temperature was established by multiple regression analysis based on hot simula￾tion experiment data‚and statistical test of the mathematical model revealed that the mathematical model is rea￾sonable． KEY WORDS cermets；heat simulation experiment；constitutive equations；multiple regression；engine 第2期 马向平等： 金属陶瓷在高温下的变形规律 ·225·