Abstract
The dynamic compressive behavior of ice is investigated using a large-sized (37 mm in diameter) modified aluminum split Hopkinson pressure bar (SHPB) with pulse shaper at the strain rate from 500 s-1 to 1200 s-1. A series of relatively stable experimental results of dynamic compressive strength versus strain rate and a linear fitting curve have been obtained by controlling data scatter within 25%. The composition of incident wave has been discussed. The effects of pulse shaper diameter and velocity of striker bar have been tested. The properties and principles of incident wave in different stage has been elaborated when using pulse shaper. A theoretical analysis of pulse shaper and bar size effects on the rising time of incident wave has been conducted. Results show the thickness of pulse shaper is proportional to the rising time. Enlarging the diameter and reducing the velocity of the striker bar could increase the rising time and suppress the dispersion. The diameter and wave impedance of bars also contribute to the rising time.
Highlights
Various outdoor structures, such as aircrafts, vehicles and buildings, are continually under attack by hail ice storm in air or on the ground
Tensile and compressive loading tests concluded that the tensile strength of ice is much smaller than that of compressive strength
The dynamic compressive material properties experiments of ice have been conducted by using a split Hopkinson pressure bar (SHPB)
Summary
Various outdoor structures, such as aircrafts, vehicles and buildings, are continually under attack by hail ice storm in air or on the ground. By freezing two metal disks on both sides of ice specimen, the problems of surface flatness and ice melting during the tests were fixed As they mentioned in their research, their results of compressive strengths were significantly two or three times higher than the results of others (6.53±1.44 MPa (Dutta et al 2003) and 6.77±3.23 MPa (Dutta et al 2004)) at strain rates from 10 s-1 to 100 s-1. A series of experiments on the dynamic mechanical properties of ice have been conducted by using a large diameter (37 mm) SHPB to reduce the data scatter of compressive strength versus strain rate. The effects of varying the velocity of striker bar and the functions of bars parameters on waveform shaping have been explained
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
