کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
828876 | 1470333 | 2014 | 10 صفحه PDF | دانلود رایگان |
• Influence of pre-existing defect in an armor system on its ballistic performance.
• Development of finite element models for the ballistic performance of armor systems.
• Prediction of the ballistic limit and back face deformation of curved armor systems.
In order to discern how pre-existing defects such as single or multiple debondings/delaminations in a curved armor system may affect its ballistic protection performance, two-dimensional axial finite element models were generated using the commercial software ANSYS/Autodyn. The armor systems considered in this investigation are composed of boron carbide front component and Kevlar/epoxy backing component. They are assumed to be perfectly bonded at the interface without defects. The parametric study shows that for the cases considered, the maximum back face deformation of a curved armor system with or without defects is more sensitive to its curvature, material properties of the ceramic front component, and pre-existing defect size and location than the ballistic limit velocity. Additionally, both the ballistic limit velocity and maximum back face deformation are significantly affected by the backing component thickness, front/backing component thickness ratio and the number of delaminations.
Journal: Materials & Design - Volume 64, December 2014, Pages 25–34