Abstract

Abstract

In the bet of a circular economy to conserve, maintain and lengthen the value of water distribution and supply networks, infusion and vacuum technology used for on-site pipe manufacturing by means of carbon fiber is a safe, reliable and effective alternative for all of those pipelines, whose repair is a major challenge due to the complexity of action by traditional means. Excavations, interference with other services and social pressure exerted by excessive traffic cuts and supplies, are adversities that demand a cultural and strategic change towards the implementation of these innovative solutions, which are already a reality.

Abstract

High-velocity impact is one of the most common load states to which composite material structures can be subjected during their service life and can cause a sudden loss of properties favouring its catastrophic failure. Impact loads are usually caused by external elements such as debris, particles carried by the wind, hail, fragments derived from an explosion, etc. All these cases can be represented as high-velocity impacts; however, in general, these impacts are not usually reduced to the action of a single projectile on the structure but can be represented as multiple projectiles that impact simultaneously, or sequentially, on it. This is known as multiple impact phenomenon. In this work a numerical model is developed, using a commercial finite-element software, that allows to analyse the phenomenon of multiple impact in composite material laminates, focusing attention on the wave’s interaction between projectiles. The model is validated with experimental results from the scientific literature for a single high-velocity impact. The interaction among waves generated by the action of two projectiles impacting at the same velocity, and that are separated at a certain distance from each other (simultaneous high-velocity multiple impact), is studied in terms of out-of-plane displacement, and relative movement between projectiles.