Forming-limit diagrams of aluminum tailor-welded blank weld material

摘要: The current work develops forming-limit diagrams (FLDs) for weld materials in aluminum tailorwelded blanks (TWBs) under biaxial stretching conditions. Aluminum TWBs consist of multiple-thickness and alloy sheet welded together into a single, variable-thickness blank. manufacture their application automotive body panels requires constituent material to deform loading during sheet-metal stamping. geometry is typically nonuniform relatively small, causing difficulty if one attempts determine the metal FLDs via traditional experimental methods. subject primarily relies on theoretical FLD calculation techniques using Marciniak Kuczynski (M-K) method. This numerical technique use constants levels initial imperfection that have been experimentally determined unique miniature tensile specimens isolate characterize metal. work, with statistical analysis level imperfection, allows generation both an average safe FLD. metals studied this were produced autogeneous gas tungsten arc welding 1- 2-mm-thick 5000 series sheet.