Deformation characteristics and inertial effect of complex aluminum alloy sheet part under impact hydroforming: experiments and numerical analysis

Abstract Impact hydroforming (IHF), as a novel sheet metal forming technology with the advantages of high strain rate and flexible liquid loading, is highly suitable for efficiently manufacturing aluminum complex-shaped parts. In this paper, deformation characteristics complex parts under IHF are systematically investigated. The mechanical properties 2024 alloy wide range rates (10 ?3 s ?1 –3.3×10 3 ) were studied. It indicated that elongation was improved by 116.01% 3.306 × 10 , referring to . Further, part symmetrical asymmetrical structures selected. role inertial effect investigated well-developed solid–liquid coupling finite element (SLC-FE) model accuracy. Differentiating tendency found structure notably prior at central zone, showing “bulging” profile initial stage. Whereas, synchronous presented “flat” profile. Additionally, distinctive observed different positions change both structures, in which lower values resulted their regions. Meanwhile, evolved impacting speed. Specially, larger difference increasing