Experimental study on static and dynamic mechanical properties of composite buffer with entangled metallic wire materials and viscous fluid

This article proposes a composite buffer based on two characteristics: porous throttling and damping energy dissipation of entangled metal wire material (EMWM). A series of quasi-static tests and low-speed impact tests were carried out to analyze its stiffness and damping characteristics. The filling degrees of cushioning force curves and energy absorption rate were proposed as quantitative evaluation indicators for the composite buffer under low-speed impact. Test results showed that the stiffness and damping of the composite buffer layer increase with the increasing density of the EMWM damping layer under quasi-static conditions, but the static loss factor fluctuates. Under low-speed impact load, the composite buffer demonstrates stable force output, with an energy absorption rate above 85% and favourable filling degrees. This work provides a practical reference for its engineering application.