A STUDY ON THE RESPONSE OF SINGLE AND DOUBLE CIRCULAR PLATES SUBJECTED TO LOCALISED BLAST LOADING
THE RESPONSE OF SINGLE AND DOUBLE LAYERED STEEL PLATES TO LOCALISED AIR-BLAST LOADING WAS EXAMINED. TWO CONFIGURATIONS, BOTH COMPRISING FULLY CLAMPED CIRCULAR PLATES WITH A 200 MM EXPOSED DIAMETER, WERE CONSIDERED: 4MM THICK SINGLE AND (2+2) MM DOUBLE LAYERED PLATES. THE LOCALISED AIR-BLAST LOADING WAS APPLIED BY CENTRALLY DETONATING DISCS OF PE4 PLASTIC EXPLOSIVE. SIMILAR FAILURE MODES WERE EVIDENT IN THE SINGLE AND DOUBLE PLATE CONFIGURATIONS, NAMELY, MODE I (LARGE INELASTIC DEFORMATION) AND MODE II (CAPPING FAILURE ALONG WITH DEFORMATION) RESPONSES. THE DOUBLE PLATES EXHIBITED LARGER MIDPOINT DEFLECTIONS THAN THE SINGLE PLATES, AND PARTIAL TEARING OF THE FRONT PLATE IN THE DOUBLE PLATES WAS OBSERVED AT A LOWER IMPULSE THAN IN THE SINGLE PLATES. HOWEVER, COMPLETE CAPPING OF BOTH PLATES IN THE DOUBLE PLATE CONFIGURATION OCCURRED AT THE SAME CHARGE MASS AS FOR THE SINGLE PLATES, IMPLYING THAT BOTH CONFIGURATIONS OFFER EQUIVALENT PROTECTION FROM CAPPING FAILURE AS A RESULT OF THIS TYPE OF LOCALISED BLAST LOADING. A METALLOGRAPHIC STUDY OF THE DEFORMED AND TORN PLATE REGIONS DID NOT REVEAL ANY PHASE TRANSFORMATION IN THE STEEL. IT WAS ALSO FOUND THAT THE 2 MM THICK PLATES EXHIBITED LARGER INCREASES IN GRAIN SIZE THAN THE 4 MM THICK PLATES.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License [CC BY] that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).