EXPERIMENTAL STUDY ON LUNG SURROGATE BY BLUNT IMPACTING OF RUBBER BULLET

To construct a lung surrogate with similar mechanical properties and equivalent blunt impact effects, foam silicone material was used as a simulated biological lung material. The material was processed into lung organs structurally resembling biological lungs and integrated with sensors, data acquisition devices, and other equipment to build a testable lung surrogate. Experimental results demonstrated that the mechanical compression properties of the lung surrogate closely matched those of biological lungs, with strong consistency in compression force and compression rate test outcomes. Under the blunt impact of rubber bullets, the deviation in surface peak overpressure attenuation between the lung surrogate and biological lung was 0.23%, while the deviation in overall lung pressure impulse attenuation was 0.16%. The lung surrogate and testing methodology provide technical support for subsequent assessments of lung blunt impact trauma and evaluations of thoracic protective equipment.