3D Printing: 3D Printed Tubulanes as Lightweight Hypervelocity Impact Resistant Structures (Small 52/2019)

Abstract

This cover shows Tubulane structures made up of bio‐degradable soft polymer created by 3D printing. It can handle ballistic impact. The bullet stops in the second layer of the tubulane structure with no significant structural damage while bullet fire with the same speed propagates the crack through the whole reference cube. More details can be found in article number 1904747 by Douglas S. Galvão, Chandra Sekhar Tiwary, Pulickel M. Ajayan, and co‐workers.

Bioinspired Construction of Micronano Lignocellulose into an Impact Resistance “Wooden Armor” With Bouligand Structure

“…With a rise in terrorism as well as domestic and international conflicts around the world, impact protection has become an indispensable engineering topic of research to minimize the destructive damages to structures upon collision and impact. − In recent years, synthetic impact-resistant materials with exceptional mechanical performance (e.g., steels, alloys, and ceramics) have been widely used in military protection bunkers, naval units, vehicle safety protection, and in several engineering fields. , Strong primary bonds between component atoms are leveraged to endow these structural materials with excellent mechanical performance. , However, the heaviness and high processing energy consumption severely limit the wide application of traditional impact-resistant materials in modern times. Even though the energy barrier required to break such primary bonds is high, once broken, the block macrostructure will be catastrophically destroyed, illustrating brittleness and undesirable impact toughness (i.e., conflict between strength and toughness) …”

“…1−3 In recent years, synthetic impact-resistant materials with exceptional mechanical performance (e.g., steels, alloys, and ceramics) have been widely used in military protection bunkers, naval units, vehicle safety protection, and in several engineering fields. 4,5 Strong primary bonds between component atoms are leveraged to endow these structural materials with excellent mechanical performance. 6,7 However, the heaviness and high processing energy consumption severely limit the wide application of traditional impact-resistant materials in modern times.…”