Unified failure analysis for tubular hydroforming

Overview on constitutive modeling for hydroforming with the existence of through-thickness normal stress

“…INDEED and LS-DYNA) have been used to demonstrate some kinds of simulations for both wrinkling and bursting of hydroforming. Nefussi and Combescure (2002) and Brunet et al (2004) proposed the unified approaches in the context of implicit codes and explicit codes, respectively. However, these researches were all based on the plane-stress assumption.…”

Experimental and numerical simulation of tube hydroforming (THF)

“…The wrinkles generated during the buckling in the THF process could be bad or good ones. Recent works [8][9][10][11] outstand the wrinkles produced in the buckling stage could be distinguished as good or bad ones, and they are related to determined combination of punch stroke and initial internal pressure sets. The wrinkle would be a benefic one if it can be completely removed in the calibration step, otherwise the bad one will still be after the calibration step.…”

“…THF is manufacturing process used mainly to produce low cost and lightweight components, maintaining their structural integrity, compared with traditional forming processes [1][2][3][4][5][6][7][8][9][10][11]. Nowadays, two THF techniques outstand: the THF with sequenced pressurization (PSH) and the high pressure hydroforming (HPH).…”

Analysis of necking in tube hydroforming by means of extended forming limit stress diagram

“…In the literature, there are several studies (Brunet et al, 2004;Jansson et al, 2008;Asnafi & Skogsgardh, 2000) which investigated tubular hydroforming numerically and experimentally. However, failures such as buckling and necking which lead to burst of the tube could occur in the tube hydroforming process (Guan & Pourboghrat, 2008;Kim et al, 2009).…”