Instrumented Drop Weight Impact Tester

摘要

Test equipment for determining the contact force and dynamic response of acomposite laminate under impact is described. The equipment is based on the falling weight setup. The measurement system consists of a dynamic force transducer placed in the front part of an impactor, a charge amplifier, strain gages, DC measuring amplifiers and a digital storage oscilloscope which is connected to a microcomputer via a GBIB-interface. The force transducer is designed for a maximum load of 5 kN in compression and for a frequency range of 100 Hz to 50 kHz. The strains of the laminate are measured with strain gages which are mounted on the surface of the laminate. Strain and force signals are recorded by the digital storage oscilloscope through a strain amplifier and an electric charge amplifier, respectively. The force transducer is calibrated dynamically with a standard force transducer.