CAJ | 학술논문

从界面防护的角度出发，研究了温度载荷下固体发动机中弹性-粘弹性轴对称界面端的奇异应力场。依据对应原理，由弹性-弹性界面端的特征方程获得了弹性-粘弹性界面端的应力奇异性指数。根据应变匹配模型，推导了温度载荷下轴对称界面端中的常应力项。针对现有的应力释放罩/推进剂界面端，分析了材料参数和结合角对其应力奇异性指数的影响规律，在不改变装药量的前提下，提出了弱奇异性或无奇异性界面端的设计。结果表明，自由边呈平角时界面端至多存在-0．1的弱奇异性，界面端应力集中水平显著降低。
종계면방호적각도출발，연구료온도재하하고체발동궤중탄성-점탄성축대칭계면단적기이응력장。의거대응원리，유탄성-탄성계면단적특정방정획득료탄성-점탄성계면단적응력기이성지수。근거응변필배모형，추도료온도재하하축대칭계면단중적상응력항。침대현유적응력석방조/추진제계면단，분석료재료삼수화결합각대기응력기이성지수적영향규률，재불개변장약량적전제하，제출료약기이성혹무기이성계면단적설계。결과표명，자유변정평각시계면단지다존재-0．1적약기이성，계면단응력집중수평현저강저。
Singular stress fields around axisymmetric elastic-viscoelastic joint under temperature loading in solid motor were studied for the purpose of interface protection.The singular exponent of elastic-viscoelastic axisymmetric joint was obtained from the eigenvalue equation of elastic-elastic joint based on the elastic-viscoelastic correspondence principle.The regular stress term of axi-symmetric joint under temperature loading was deduced on the basis of the strain match model.Aimed at the original design of stress release cover/propellant joint,the effects of bonded material parameters and bonded angular on stress singular exponent were ana-lyzed,and the weak singularity or without singularity design of joint was put forward on the condition that the charge will not be changed.Results show that there is one about -0.1 week singularity at most when the free edges of joint form a straight angle,the stress concentration level will be declined obviously.