Applying ultrasonic vibration in sheet metal forming can change its mechanism and improve formability. The uniaxial tensile bulging limit experimental setups were designed to study the relationship induced by excitation, results under different conditions analyzed. It was found that has effects on left right sides of diagram (FLD). Under same frequency, maximum increment major strain is about 9...

This study was performed to analyze the forming fracture of crash box with extruded Al6060-T6 profile. Deep drawing test evaluate formability For various specimens, deep tests were repeated measure maximum stroke at which did not occur. The finite element analysis for calculate principal strain through obtained stroke. limit diagram design concave shape calculated strains FEA. optimized by usin...

The phase diagram of the two-dimensional extended q−states Potts model is investigated in the q → 1 limit. This is equivalent to studying the phase diagram of a two-dimensional infinite interacting lattice animal. An exact solution on the Bethe lattice and a Migdal-Kadanoff renormalization group calculation predict a line of θ transitions from an extended to a compact phase in the lattice anima...

This work established strain-based forming limit diagrams (FLDs) for DP600 steel sheets by means of experimental investigation and theoretical prediction. The results showed that compared to the curve (FLC), predicted Keeler equation, FLCs Hill’79 yield criterion, or Logan-Hosford were more suitable predicting sheets. Solutions from analytical methods FLD, based on combining uniaxial tensile te...

Abstract One of the commonly used metal forming processes is deep drawing, in which circular blanks are converted into a cup or shell with good surface finish. In this paper, the forming characteristics of Deep Draw Steel (DDS), a low-carbon steel with many engineering and automotive applications, is investigated by deep drawing. The forming limit diagram is a useful concept in favor of charact...

The experimental detection of localized necking is an important issue in sheet metal forming. Today, the most common and extended techniques are strain-based methods using digital image correlation (DIC). present work discuses a thermal methodology to detect onset metals based on analysis temperature gradient infrared thermography (DIT). A series tensile tests H240LA-O3 high-strength steel 1.2m...