4D printed assembly of sensors and actuators in complex formed metallic lightweight structures

Powder bed fusion is an emerging additive manufacturing technique capable of producing complex formed metallic structures, which are not possible to manufacture with conventional manufacturing. These benefits design freedom and manufacturability often exploited in aerospace together topology optimization produce components low mass high stiffness. However, monolithic structures lead weakly damped resonant vibrations threatening e.g. space missions or hazardous for mounted equipment. The integration piezoelectric elements the baseline active passive damping these structures. This work presents a novel 4D printing approach exploiting shape memory effect NiTi as pre-stress actuation assembly post-processing effort potential shock absorptance. influence on pre-stressing most significant requirement stacks investigated. An electronic circuit was successfully validated measure caused by additively manufactured rod. Influence stack design, speed loading thermal activation onto measurement Finally, 65 % specified allowable maximum from manufacturer achieved while exceeding lower limit.