Accurate prediction of the final shape using numerical modeling has been a top priority in the field of sheet and bulk forming. Better shape prediction is the result of a better estimation of the physical stress and strain state. For experimental and numerical investigations of such estimations, simple benchmark processes are used. In this paper a benchmark process involving forging (flattening...

Elastic recovery of the material, called springback, is one of the problems in sheet metal forming of drawpieces, especially with a complex shape. The springback can be influenced by various technological, geometrical, and material parameters. In this paper the results of experimental testing and numerical study are presented. The experiments are conducted on DC04 steel sheets, commonly used in...

In recent years, the studies on the enhancement of the prediction capability of the sheet metal forming simulations have increased remarkably. Among the used models in the finite element simulations, the yield criteria and hardening models have a great importance for the prediction of the formability and springback. The required model parameters are determined by using the several test results,...

A theoretical model of a DNA oligonucleotide duplex featuring A-tracts phased by a full helix turn is developed based on molecular dynamics computer simulation. The extent to which this model agrees with relevant experimental data on axis bending and the relationship of A-tracts to bending and other aspects of helix morphology is investigated. Specifically, a series of nanosecond-level molecula...

Springback in sheet bending is a well-defined phenomenon; however, variation of springback difficult to control causing quality problems especially mass-produced goods such as home appliances. As an alternative straight flanging, the rotary die process offers reduced well geometric variation; there little knowledge literature. The effects parameters on behavior flanging and applied appliance si...

This works proposes a novel approach to develop higher-order finite elements by taking progressive damage into account in the formulation. The is based on Carrera’s unified formulation (CUF) while model continuum mechanics (CDM) principles, which implemented as UEL (User Element subroutine) written FORTRAN and linked Abaqus. assessed simulating plate under distributed sinusoidal loads. Besides,...

Idiopathic pulmonary fibrosis (IPF) is a chronic progressive lung disease with a median survival of approximately 3 years from diagnosis. Accurate prediction of mortality is important in IPF, as it helps determine the urgency of lung transplantation, guides other management and end-of-life decisions, and facilitates enrichment of clinical trial populations. Although most patients with IPF die f...

In free bending process, the axis shape of bent tube is determined by motion trajectory die. The tubes with different radii and directions can be formed continuously adjusting position posture To accurately form pre-designed tube, formation mechanism arc in process was analyzed. mathematical model between radius deviation established moving direction die also according to plane space azimuth wh...

Myocardial structural remodeling, a progressive, often self-perpetuating process, is an important marker of progressive heart failure. Myocardial cell loss, through any number of mechanisms mediating cellular death, is an important component in its genesis.1 Traditionally, necrosis has been regarded as the pathological hallmark of myocardial cell death. However, there is accumulating evidence t...

Chronic obstructive pulmonary disease (COPD) includes emphysema and chronic bronchitis, which are characterised by a progressive airflow limitation and chronic infiammation. The pathogenesis of COPD involves different cells, mainly epithelial cells, macrophages, neutrophils, and CD8 lymphocytes. Bronchial epithelium lines the mucosal surface of the airways, forming a mechanical barrier that sep...