Mechanical Behavior of Polypropylene and Epoxy-based Woven Glass Fiber Reinforced Composites Under High-Velocity Impact Loading

High velocity impact;Ballistic limit;Spherical head projectile;Composites;Analytical modeling;Digital image correlation;Failure modes;Optical microscopy;Sharp nose projectile;Mechanical Engineering;Mechanical Engineering, College of Engineering & Computer Science

Paruchuru, SaikanthJayaraman, Tanjore V. ;

University of Michigan

关键词: High velocity impact;    Ballistic limit;    Spherical head projectile;    Composites;    Analytical modeling;    Digital image correlation;    Failure modes;    Optical microscopy;    Sharp nose projectile;    Mechanical Engineering;    Mechanical Engineering, College of Engineering & Computer Science;   

Others  :  https://deepblue.lib.umich.edu/bitstream/handle/2027.42/148797/Thesis%20Embedded.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Assessment of high-velocity impact resistance is necessary for light-weight structures that may be subjected to the impact loading conditions. Polymer matrix composites are one ofthe most commonly used materials in light weight applications.They are classified into various types based on the type of fibers, the quantity of fibers, the orientation of fibers, and type of matrix or resin used.The fibers that are generally preferred for the ballistic applications are aramid fibers, carbon fibers,and glass fibers. The objective of this research project is to study the ballistic properties of glass fiber thermoplastic and thermoset based woven polymer matrix composites using Shield Strand S ® / Epoxy,E-glass fibers / Polypropylene (Twintex ®) composites by spherical head and sharp nose projectiles. Composites were manufactured with a number of fiber layers using hand layupand compression method. Ballistic testing was performed with a single stage gas system, and impact velocities ranged between 50 m/s-180m/s. After each test, impact velocity and impact energy was analyzed using a velocity sensor. Modes of failure and ballistic limit of the composites were investigated using high-speed cameras (APX-Photron) and digitalimage correlation, maximum transient out of plane displacements at each stage ofimpact and final back face displacement of the specimens after the impact were revealed. Finally, Analytical modeling was used to predict the ballistic limit of these composite materials.