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Deformation and Failure of OFHC Copper under high strain rate shear compression

Andrew Ruggiero ; Gabriel Testa ; Nicola Bonora ; Gianluca Iannitti ; Italo Peresechino ; Magnus Hörnqvist (Institutionen för teknisk fysik, Materialens mikrostruktur )
19th Biennial American Physical Society Conference on Shock Compression of Condensed Matter, SCCM 2015; Marriott Waterside; United States; 14-19 June 2015 (0094243X). (2017)
[Konferensbidrag, övrigt]

Hat-shaped specimen geometries were developed to generate high strain, high-strain-rates deformation under prescribed conditions. These geometries offer also the possibility to investigate the occurrence of ductile rupture under low or negative stress triaxiality, where most failure models fail. In this work, three tophat geometries were designed, by means of extensive numerical simulation, to obtain desired stress triaxiality values within the shear region that develops across the ligament. Material failure was simulated using the Continuum Damage Model (CDM) formulation with a unilateral condition for damage accumulation and validated by comparing with quasi-static and high strain rate compression tests results on OFHC copper. Preliminary results seem to indicate that ductile tearing initiates at the specimen corner location where positive stress triaxiality occurs because of local rotation and eventually propagates along the ligament.



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Denna post skapades 2016-01-26. Senast ändrad 2017-06-14.
CPL Pubid: 231318

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Materialens mikrostruktur (2012-2015)

Ämnesområden

Materialvetenskap
Teknisk mekanik
Övrig teknisk mekanik
Övrig teknisk materialvetenskap

Chalmers infrastruktur