High-Strain-Rate Forming of Aluminum and Steel Sheets for Automotive Applications
The formability of aluminum alloy AA5182-O and DP600 steel sheets at high-strain-rates was investigated using an electrohydraulic forming (EHF) setup. Test sheets, ~150 mm diameter x 1 mm thick, were clamped around their circumference and subjected to a pressure-pulse (several 100's duration) generated by a high-energy (up to ~34 kJ) under-water electrical discharge. The real-time strain and strain-rate of the deforming sheets were quantified by the digital image correlation (DIC) technique using a pair of high-speed cameras (~15's per frame). Strain-rate amplification was observed when the sheets were deformed into a conical die, with the maximum in-plane strain-rate and strain for aluminum measured as ~1200 /s and ~0.2, respectively. The deformation behavior of the sheets was modeled using ABAQUS/finite element explicit code and better correlation, between the predicted and the experimental sheet deformation behavior, was observed when an alternate pressure-profile was used instead of the one available from the literature.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1021293
- Report Number(s):
- PNNL-SA-71641; VT0505000; TRN: US201116%%1171
- Resource Relation:
- Conference: Proceedings of the International Deep Drawing Group Conference (IDDRG-2010 ), May 31-June 02, 2010, Graz, Austria
- Country of Publication:
- United States
- Language:
- English
Similar Records
Electro-Hydraulic Forming of Sheet Metals: Free-forming vs. Conical-die Forming
Electrohydraulic Forming of Near-Net Shape Automotive Panels