复合改性双基推进剂黏弹性-黏塑性-黏损伤本构模型研究  

Research on the Viscoelasticity-viscoplasticity-viscodamage Constitutive Model of Composite Modified Double Base Propellant

作　　者：王鸿丽[1] 许进升[1] 刘宗魁 童心[1] 周长省[1] WANG Hong-li;XU Jin-sheng;LIU Zong-kui;TONG Xin;ZHOU Chang-sheng(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,China;713th Research Institute,China Shipbuilding Industry Corporation,Zhengzhou 450015,Henan,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]中国船舶重工集团有限公司第713研究所,河南郑州450015

出　　处：《兵工学报》2018年第7期1308-1315,共8页Acta Armamentarii

基　　金：国家自然科学基金项目(51606098)

摘　　要：为描述复合改性双基(CMDB)推进剂复杂的力学性能,推导出黏弹性-黏塑性-黏损伤本构模型。进行一系列蠕变-回复试验,获得了本构模型参数。通过不同应力水平和不同加载时间下的蠕变-回复试验和恒加载率-回复试验,验证了本构模型的有效性。结果表明:黏弹性-黏塑性-黏损伤本构模型能够预测CMDB推进剂的蠕变-回复响应和恒加载率-回复响应;与黏弹性-黏塑性本构模型相比,黏弹性-黏塑性-黏损伤模型对CMDB推进剂力学性能的预测能力明显提高;损伤变量随着应变增大,在经过缓慢增大和快速增大后逐渐趋于稳定,应变变化越慢,损伤变量越大,黏弹性-黏塑性-黏损伤模型和黏弹性-黏塑性模型的预测结果差别就越大。A viscoelasticity-viscoplasticity-viscodamage constitutive model is derived to characterize the complicated mechanical properties of composite modified double base（ CMDB） propellant. The model parameters are obtained by a series of creep-recovery tests. Creep-recovery tests under different stress levels and loading times as well as some constant loading rate-recovery tests are done to verify the model.The test results show that the viscoelasticity-viscoplasticity-viscodamage constitutive model is capable of predicting the creep-recovery response and constant loading rate-recovery response of CMDB propellant.Compared with viscoelasticity-viscoplasticity constitutive model,the viscoelasticity-viscoplasticity-viscodamage model has a significant improvement in predicting the mechanical properties of CMDB propellant.The damage variable becomes steady gradually after it slowly increases first and then rapidly increases with strain. When the strain changes more slowly,the damage variable is larger,and the difference between the predicted results of the viscoelasticity-viscoplasticity-viscodamage model and the viscoelasticityviscoplasticity model is greater.

关 键 词：复合改性双基推进剂 黏弹性 黏塑性 黏损伤 蠕变 回复 本构模型 

分 类 号：V512.3[航空宇航科学与技术—航空宇航推进理论与工程]