Study and analysis of mechanical properties on sandwich structure with negative poissons ratio honeycomb core

Abstract

Cellular solid was a worldwide famous engineering study. Several scientists have utilized this study to produce various honeycomb structures. Honeycomb structure was mainly used for strong, lightweight and elastic impact. As per these, the structural materials would be modified. The major applications were generally used for aircraft in the past literature because it needs much negative ratio. This research has also made for the safety application, so its speed of intention diverted into the helmet which was considered as the human safety guard. The normal foams were only used in the present helmet it might cause a great injurious in the head while an accident occurred. But in the present investigation, a chiral structure method as a Light Lamping Structure (LLS) of honeycomb utilizing ABS material that had a Negative Poissonand#8223;s Ratio (NPR) used in the material.This kind of helmet rescue humans from an accident. A number of researches were performed to create the new invention by applying various structures. A light composite material used in a minimum thickness of chiral structure that designed in light lamping design of solid work 2018. It also computed the total deformation, directional strength and negative strain analyzed in this predefined method. The mechanical properties contains tensile and compression were evaluated in the experiment mode . It also contrasted the numerical and experimental values. The results inferred that higher impact validates by the percentage of error. This research also estimated the betterment result in which pitch value that means the range of negative ratio sustained in a load of impact. Thus, the foams will be replaced in the original helmet for the future scope. newline