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Material Parameters in the GTN Model for Ductile Fracture Simulation of G20Mn5QT Cast Steels
Publisher: ASCE
Abstract: Material parameters in the Gurson, Tvergaard and Needleman (GTN) model were calibrated for G20Mn5QT cast steels based on tests of tension coupons and smooth notched tensile specimens, and complementary FEA. The mesh ...
Performance Improvement of Trailing Edge Internal Cooling with Drop-Shaped Pin Fin Array
Publisher: ASCE
Abstract: In this paper, flow and heat transfer in a blade trailing edge cooling channel with differently shaped pin fin arrays were investigated numerically in a Reynolds number range from 10,000 to 50,000. A novel internal structure, ...
Thermal Simulation and Fracture Resistance Evaluation of Coarse-Grain Heat-Affected Zone in Welds of Q355D Steel
Publisher: ASCE
Abstract: The coarse-grain heat-affected zone (CGHAZ) is often the most fragile part of the weld region due to hard phases and coarse grains generated during the welding. Characterization of the mechanical properties and fracture ...
Effects of Temperature Drop on Ultralow Cycle Fatigue of G20Mn5QT Cast Steel
Publisher: ASCE
Abstract: Cast steels are inherently suitable for fabricating complex joints in steel constructions. These joints may suffer from ductile fracture under ultralow cycle fatigue (ULCF) loadings during earthquakes. This problem could ...
Characterization of Mechanical Properties of Welds of Q355D Steel by DSI Technique
Publisher: ASCE
Abstract: Temperature variation during the welding will cause different solid-state phase transformations in the welding area and result in a heat-affected zone (HAZ) between the weld metal (WM) and the base metal (BM). Depth-sensing ...
Axisymmetric Nonlinear Stability of a Shallow Conical Shell with a Spherical Cap of Arbitrary Variable Shell Thickness
Publisher: American Society of Civil Engineers
Abstract: The axisymmetric nonlinear stability of a shallow conical shell with a spherical cap was studied using the point collocation method with the cubic B-spline function as a trial function. Formulas were set up to consider ...
A Simplified Strategy to Address Effects of the Drop of Temperature on the Gurson-Tvergaard-Needleman Model for G20Mn5QT Cast Steels
Publisher: ASCE
Abstract: G20Mn5QT cast steels have been widely used in cast steel connections, which may suffer from ductile fracture at ambient temperature. Northern climates make the problem even worse because the ductility of the cast steels ...
Material Parameters in Void Growth Model for G20Mn5QT Cast Steel: Calibration and Verification
Publisher: ASCE
Abstract: Micromechanical fracture models, void growth model (VGM) and stress-modified critical strain (SMCS) model, can predict the ductile fracture of structural steels by investigating the growth of microvoids existing inside ...