Abstract This study aims to discover the stress-state dependence of dynamic strain aging (DSA) effect on deformation and fracture behavior high-strength dual-phase (DP) steel at different temperatures (25–400°C) reveal damage mechanisms under these various configurations. To achieve stress states, predesigned specimens with geometric features were used. Scanning electron microscopy was applied ...

This paper presents a validated finite element modeling approach for simulating shear cutting, needing minimal amount of experimental characterization. Only one uniaxial tensile test and force–displacement relationship from punching experiment are needed calibration, with maintained prediction accuracy compared to more experimentally demanding approaches. A key ingredient is the observation tha...

In this paper, the deformation law of box-shaped parts drawing was analyzed, and mathematical expression for calculating critical fracture blank holder force (BHF) deduced. order to determine parameters 08Al sheet, notched specimen tensile tests were conducted, full-field strain specimens from obtained by digital image correlation (DIC) technology. The evolution stress triaxiality Lode paramete...

The ductile fracture behavior of a high strength steel is addressed in this two-part study using micromechanics-based approach. objective Part II to propose, identify, and validate numerical model based on the Gurson–Tvergaard–Needleman model. This enhanced by Nahshon–Hutchinson shear modification combination with generalization Thomason coalescence criterion within fully nonlocal form relying ...

This paper aims to propose an explicit formulation of the macroscopic strength criterion for porous media with spherical voids. The matrix is assumed rigid and perfectly plastic yield surface described by three-parameter criterion, which Lode angle pressure dependent capable accounting distinct values uniaxial tensile strength, compressive (UCS) equal biaxial (eBCS). An exact upper bound derive...

Introduction Exacerbations are a common cause of morbidity and mortality in patients with chronic obstructive pulmonary disease (COPD). In the European Union, the annual number of consultations per 100,000 population averages 7,300 and accounts for 10.3 billion in health care costs. Despite aggressive medical treatment, approximately one-third of patients discharged from the emerAddress of cor...

Structures undertaking dynamic load store cumulative damages on their structural members. Although these damages are generally estimated by measuring the acceleration, velocity and displacement at several observing points, the health monitoring system based on these measurements could be expensive. Therefore, approaches to the health monitoring system utilizing only the acceleration and decreas...