ORALS
SESSION: ManufacturingTuePM2-R4
High Strain-Rate Phenomena / Treatment under Shock Loading–I | Mamalis International Symposium on Advanced Manufacturing of Advanced Materials and Structures with Sustainable Industrial Applications |
| Tue Nov, 6 2018 / Room: Sao Conrado (50/2nd) | |
| Session Chairs: Manos Maragakis; Session Monitor: TBA |
15:55: [ManufacturingTuePM209] Invited
The Making of UniPore Material Through Explosive Welding Process and the Mechanical Response Under Static and Dynamic Loading Kazuyuki
Hokamoto1 ;
1Institute Pulsed Power Science, Kumamoto, Japan;
Paper Id: 7
[Abstract] Uni-directional porous (UniPore) material is one of the porous materials consisting of many uniformly elongated holes isolated on thin metal walls. It was fabricated through explosive welding process using many small pipes inserted into a large pipe [1]-[3], and such material has potential applications for energy absorption during impact loading and others. For the fabrication, a large pipe was covered by a thick ANFO based explosive cylindrical layer to accelerate the large pipe inward. The pipes were successfully welded tightly and no fracture on the small pipe walls was observed even by using a thin pipe, the thickness of which was 0.2mm.
The samples made by copper were cut into short pieces and compressed both statically and dynamically. The mechanical response under static compression tests shows a well-known "plateau region", which is possible to consume energy through large deformation. Furthermore, the dynamic response using a powder gun compressed at 400-600 m/s also shows a plateau through PVDF gauge measurement, and the deformation process is visualized using high-speed camera and compared with numerical simulation using AUTODYN code, which suggests good agreement.
References:
[1] K. Hokamoto, M. Vesenjak, Z. Ren, Mater. Lett. 137 (2014) 323-327.
[2] M. Vesenjak, K. Hokamoto, M. Sakamoto, T. Nishi, L. Krstulović-Opara, Z. Ren, Materials & Design 90 (2016) 867-880.
[3] K. Hokamoto, K. Shimomiya, M. Nishi, L. Krstulović-opara, M. Vesenjak, Z. Ren, Z., J. Mater. Process. Technol. 251 (2018) 262-266.
