Springback prediction of three-dimensional variable curvature tube bending

Springback prediction of titanium tube bending considering Bauschinger effect and Young's modulus variation

Springback Effect Prediction in Wipe Bending Process of Sheet Metal: a Ga-ann Approach

Sheet metal is one of the most important semi-finished products used in automobiles, domestic appliances, aircraft and other familiar products. Therefore sheet metal forming technology is an important engineering discipline in the area of mechanical engineering. In sheet metal forming, wipe bending process plays a major role in which the sheet metal tries to return to its original shape after r...

Analytical prediction of springback based on residual differential strain during sheet metal bending

As the springback of sheet metal during unloadingmay cause deviation from a desired shape, accurately predicting springback is essential for the design of sheet stamping operations. Finite-element models have not been successful in predicting springback; hence there is a need for analytical models to make such predictions. In this study, a model based on differential strains after relief from t...

Curvature relations in three-dimensional symmetric axes

Aspects of symmetric axis geometry in three dimensions are discussed. A notion of radius curvature is defined and a relationship between symmetric axis curvature, radius curvature, and boundary curvature is derived.

Three-dimensional analysis of renal artery bending motion during respiration.

PURPOSE To evaluate displacement and bending of the renal arteries during respiration. METHODS Seven men (mean age 59+/-7 years, range 54-71) were imaged with contrast-enhanced magnetic resonance angiography (MRA). Two phases of the MRA were acquired during separate normal inspiration and expiration breath-holds. Displacement of the kidneys and renal ostia and changes in renal branch angle we...