An Analytical Model for Ballistic Impact on Textile Based Body Armour
Polymer fibres with high tenacity and modulus such as Kevlar were widely used in personal protection applications. Normally these fibres were manufactured into different fabric structures before being lay-up layer by layer to form personal protection panels. Any guidance generated by analytical study is highly valuable for the later empirical and numerical studies. An analytical model of ballistic impact of multi-layer woven fabrics has been developed based on analytical models of ballistic impact of single yarns available in the literature and Newtons third law of motion. It incorporates the effect of various intrinsic parameters such as yarn linear density and weaving density. It also incorporates the effect of various extrinsic parameters such as projectile diameter and mass. The model also incorporates the phenomenon of strain gradient and its effects on the tensile strain at the edge of the projectile and the angle between the impact line and the yarn. In addition,possible shear failures were also incorporated by using shear strength together with maximum tensile strain as failure criterion. It has been found out that the results from the analytical modelling were very close to the experimental results. Further studies of the analytical modelling results reviewed strain distribution history of the principle yarns in each layer. It has been concluded that during the ballistic impact of multi-layer woven fabrics shear failure occurs before tensile failure for the front layers which causes the cease of the high strength polymer fibres to reach its full energy absorption potential.
Body armour Analytical model Ballistic Strain distribution Textiles
Fuyou Zhu Xiaogang Chen Garry Wells
Textiles and Paper,School of Materials,University of Manchester,Manchester,M13 9PL,UK Physical Science Department,Dstl,Porton Down,Salisbury,Wiltshire,SP4 0JQ,UK
国际会议
杭州
英文
321-325
2010-10-20（万方平台首次上网日期，不代表论文的发表时间）