Study Of Cushioning And Energy Absorption Of Paper Corrugation Tubes Under Axial Compression

In this paper,a combined experimental investigations and theoretical analyses were conducted to study the compression deformation,failure modes,energy absorption mechanism of regular polygonal paper corrugation tubes under axial compression loads.A comparative study on the energy absorption and deformation modes of regular polygonal paper corrugation tubes with different geometric parameters,cross-section shape and the direction of core and compression velocity was carried out.The main researches are as follows:First of all,according to the significant anisotropy of corrugated paperboard,assume the whole corrugation sandwich structure as a orthotropic plate and regard regular polygonal corrugation tubes as a thin-walled tubes.Typical folding units of corrugated tubes are analyzed.A theoretical formula was derived to predict the energy absorption and peak load.Secondly,the static compression properties and energy absorption characteristics of four kinds of corrugation tubular structures are studied experimentally.Test and analyse load-displacement curve,stress-strain curve and compressive deformation model of four kinds of cross section shape(regular triangle,square Pentagon,hexagon)of the paper corrugated tubes,analyzed and calculated the key performance indicators(total energy absorption,specific energy absorption,effective stroke ratio,peak load,the average load).Evaluate the effects of compression rate and geometric parameters of corrugation tube and the two direction of the core in cross-section on axial compres ion deformation modes and energy absorption mechanism.The failure mode of two direction core of corrugation tubes cross-section was studied.Finally,the rationality of the theoretical formula is verified.The experimental results are compared with the theoretical values.And then analyzed the reason of exist of errorThis work provides valuable theoretical guidance and design reference for the application of regular polygonal paper corrugation tube to transportation and packaging field.