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研究了含有裂纹和星孔的复合固体推进剂正交板的断裂问题。基于有限元软件ABAQUS,将固体推进剂当作粘弹性材料,沿着试件的上下表面施加均布位移载荷,利用 J-积分法对含硬颗粒的橡胶基复合固体推进剂进行了非线性大变形仿真计算,详细分析了裂尖附近的局部力学行为和裂纹成长行为。将应变能密度理论与应力分析的结果相耦合,预测了裂纹起始与裂尖到星孔距离之间的关系。
The fracture problem of composite solid propellant orthogonal plates with cracks and star holes was studied. Based on the finite element software ABAQUS, the solid propellant was regarded as the viscoelastic material, a uniform displacement load was applied along the upper and lower surfaces of the specimen, and the non-linearity of the rubber-based composite solid propellant with hard particles Deformation simulation calculation, a detailed analysis of the crack tip near the local mechanical behavior and crack growth behavior. The theory of strain energy density is coupled with the result of stress analysis to predict the relationship between the initiation of crack and the distance from the crack tip to the star hole.