火炸药学报

为研究斜侵彻靶板过程对装药损伤的影响,基于内聚力模型开展含装药的炮弹侵彻多层靶板的数值模拟。采用内聚力模型计算装药损伤的出现与演化,分析了两方向过载与损伤发生的关系,并且对侵彻结束后的裂纹区进行了宏观裂纹的量化,并将量化后的结果与试验进行了有效对比,验证了模型及量化方法的准确性,并研究了装药损伤与靶板倾角的关系。计算结果表明,斜侵彻情况下,横向过载的出现及不断变化导致裂纹区的出现及演化并非垂直于轴向。随着靶板后倾角度由5°增大到20°,装药的轴向过载峰值约提高0.62×104g(8.5%),横向过载峰值约提高1.35×104g(221.3%),装药的剩余速度从251m/s降至207m/s,量化后装药的宏观裂纹与横向的夹角增大约10°。

To study the effect of charge damage during oblique penetration, the numerical simulation of projectile penetrating multilayered targets was performed based on cohesive zone model. The initiation and evolution of charge damage was calculated by cohesive zone model, and the relationship between overload and damage was analyzed. The area of macrocrack after penetration was quantified, and the quantitative results were effectively compared with the experimental result to verify the accuracy of the model and the quantitative method. After that, the relation between the charge damage and the target incline angle was studied. The results show that the occurrence and its continuous change of transversal load lead to a cracked zone which is not perpendicular to the axial direction during oblique penetration. The increase of incline angle leads to a higher transversal load, which increases the angle between the macrocrack and the transversal direction.

引言
1 有限元模型
2 结果与讨论
3 结论

图1 弹-靶模型示意图<br/>Fig.1 Schematic diagram of the projectile-target model

图1 弹-靶模型示意图
Fig.1 Schematic diagram of the projectile-target model

表1 材料参数[6-8]<br/>Table 1 Parameters of materials

表1 材料参数[6-8]
Table 1 Parameters of materials

图2 装药轴向方向和横向方向的过载曲线<br/>Fig.2 Overload of the charge in the axial and transversal directions

图2 装药轴向方向和横向方向的过载曲线
Fig.2 Overload of the charge in the axial and transversal directions

图3 装药裂纹区的演化过程<br/>Fig.3 Crack evolution of the charge

图3 装药裂纹区的演化过程
Fig.3 Crack evolution of the charge

图4 量化后的宏观裂纹<br/>Fig.4 Quantified macrocrack

图4 量化后的宏观裂纹
Fig.4 Quantified macrocrack

图5 量化区域的横截面<br/>Fig.5 Cross-section of the quantified region

图5 量化区域的横截面
Fig.5 Cross-section of the quantified region

图6 试验结果的横截面<br/>Fig.6 Cross-section in the test

图6 试验结果的横截面
Fig.6 Cross-section in the test

图7 不同倾角下装药轴向方向和横向方向的过载曲线<br/>Fig.7 Overload of the charge in the axial and transversal

图7 不同倾角下装药轴向方向和横向方向的过载曲线
Fig.7 Overload of the charge in the axial and transversal

图8 不同倾角下装药的速度曲线<br/>Fig.8 The velocity of the charge associated with different incline angles of targets

图8 不同倾角下装药的速度曲线
Fig.8 The velocity of the charge associated with different incline angles of targets

图9 不同倾角下装药的裂纹区分布<br/>Fig.9 Crack distribution of the charge associated with different incline angles of targets

图9 不同倾角下装药的裂纹区分布
Fig.9 Crack distribution of the charge associated with different incline angles of targets

表2 不同倾角下剩余速度、过载和损伤占比<br/>Table 2 Residual velocity, overload and damage percentage associated with different incline angle of targets

表2 不同倾角下剩余速度、过载和损伤占比
Table 2 Residual velocity, overload and damage percentage associated with different incline angle of targets

图10 不同倾角下装药裂纹区出现的位置<br/>Fig.10 Crack initiation sites in the charge associated with different incline angles of targets

图10 不同倾角下装药裂纹区出现的位置
Fig.10 Crack initiation sites in the charge associated with different incline angles of targets

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备注

引言

1 有限元模型

2 结果与讨论

3 结论

期刊信息

备注

引言

1 有限元模型

2 结果与讨论

3 结 论

期刊信息

3 结论