固体火箭技术
固體火箭技術
고체화전기술
JOURNAL OF SOLID ROCKET TECHNOLOGY
2014年
2期
192-197
,共6页
粘弹性%累积损伤%本构方程%改性双基推进剂
粘彈性%纍積損傷%本構方程%改性雙基推進劑
점탄성%루적손상%본구방정%개성쌍기추진제
viscoelastic%cumulative damage%constitutive equation%modified double base propellant
针对改性双基推进剂，提出了一种含累积损伤的非线性粘弹性本构模型。该模型基于Schapery含损伤的非线性粘弹性本构模型，由伪应变和非线性系数组成，其中非线性系数是关于累积损伤变量的函数。同时，提出了通过松弛试验和单轴等速拉伸试验获取材料本构参数的方法。通过理论值与试验结果对比，表明该本构模型能较好预测改性双基推进剂等速拉伸及复杂加载条件下的力学响应特性。
針對改性雙基推進劑，提齣瞭一種含纍積損傷的非線性粘彈性本構模型。該模型基于Schapery含損傷的非線性粘彈性本構模型，由偽應變和非線性繫數組成，其中非線性繫數是關于纍積損傷變量的函數。同時，提齣瞭通過鬆弛試驗和單軸等速拉伸試驗穫取材料本構參數的方法。通過理論值與試驗結果對比，錶明該本構模型能較好預測改性雙基推進劑等速拉伸及複雜加載條件下的力學響應特性。
침대개성쌍기추진제，제출료일충함루적손상적비선성점탄성본구모형。해모형기우Schapery함손상적비선성점탄성본구모형，유위응변화비선성계수조성，기중비선성계수시관우루적손상변량적함수。동시，제출료통과송이시험화단축등속랍신시험획취재료본구삼수적방법。통과이론치여시험결과대비，표명해본구모형능교호예측개성쌍기추진제등속랍신급복잡가재조건하적역학향응특성。
A nonlinear viscoelastic constitutive equation with cumulative damage was proposed to model modified double base propellants.This model is based on Schapery's nonlinear viscoelastic constitutive equation with damage,and is composed of pseudo-strain and a nonlinear coefficient that is a function of a damage parameter.A method for determining the parameters was introduced, with the parameters obtained through relaxation and uniaxial constant strain rate tension tests.Predictions using the constitutive equa-tion are in good agreement with experimental measurements from constant strain rate tension tests and complex train history tension tests.
