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ARTICLE
CONSTITUTIVE MODELING OF ASYMMETRIC HARDENING BEHAVIOR OF TRANSFORMATION-INDUCED PLASTICITY STEELS
Transformation-induced plasticity (TRIP) steels are part of advanced high strength steels capable of phase transformation, having good strength and ductility. The transformation rate is known to be dependent on the stress state, which may lead to asymmetric hardening behaviour...
ARTICLE
APPLICATION OF A GRAPHICAL METHOD ON ESTIMATING FORMING LIMIT CURVE OF AUTOMOTIVE SHEET METALS
In the automotive engineering community, the modified maximum force criterion proposed by Hora and coworkers is considered acceptable for theoretically estimating the forming limit curve (FLC) of sheet metals. Based on this criterion, a graphical method is proposed to simplify...
ARTICLE
ON THE CONSTITUTIVE MODELS FOR ULTRA-HIGH STRAIN RATE DEFORMATION OF METALS
Ultra-high strain rate deformation (> 104 s-1) is common in high speed manufacturing and impact engineering. However, a general constitutive model suitable for describing the material deformation at ultra-high strain rates is still unavailable. The purpose of this study is of ...
ARTICLE
RECRYSTALLIZATION TEXTURE OF ELECTRODEPOSITED ZINC
Electrodeposited zinc layers help prevent the corrosion of steel surfaces. The microstructure, surface morphology, and texture of the electrodeposits are related to the deposition variables. Herein the surface morphology and microstructure are investigated as functions of the ...
ARTICLE
OPTIMAL PROCESS DESIGN IN HOT FORGING IN TERMS OF GRAIN FLOW QUALITY
With the improvement in the accuracy of simulation and computation time, the need for the application of optimization technique in designing process parameters is increasing and is being realized in some fields. However, two obstacles are still preventing the optimization tech...
ARTICLE
MINIMIZATION OF SURFACE DEFLECTION IN RECTANGULAR EMBOSSING USING AUTOMATIC TRAINING OF ARTIFICIAL NEURAL NETWORK AND GENETIC ALGORITHM
Surface deflection is a phenomenon that causes fine wrinkles on the outer surfaces of sheet metal and deteriorates product external appearance. It is quantitatively defined as the difference between the section curve of the sheet and the ideal curve. In this study, using neura...
ARTICLE
WARM FORMING BEHAVIOR OF MAGNESIUM ALLOY SHEET IN MANUFACTURING OF WINDOW REGULATOR RAIL
Recently, as the demands to improve automotive fuel efficiency grow, several attempts are being conducted on the development of lightweight automotive components using magnesium (Mg) alloy sheets having the highest specific strength among metal materials. In a window regulator...
ARTICLE
ENHANCED CONSTITUTIVE MODEL FOR AERONAUTIC ALUMINIUM ALLOY (AA2024-T351) UNDER HIGH STRAIN RATES AND ELEVATED TEMPERATURES
Success of the numerical simulations depends on the accuracy of the material constitutive relations. Most of the ductile materials exhibit increased strain rate sensitivity at higher strain rates (> 103 s1) compared to low and medium strain rates. Meanwhile, plastic deformat...
ARTICLE
RESEARCH OF DIFFERENT PROCESSES FOR FORMING FIBER METAL LAMINATES
The paper presents the results of forming rifts in five-layer fiber reinforced metal polymer laminates by electromagnetic forming. During the experimental studies the discharge energy of the electro-magnetic machine was varied in such a way as to achieve different depths of th...
ARTICLE
DEVELOPMENT OF A MACHINE LEARNING BASED FAST RUNNING MODEL TO DETERMINE RAPIDLY THE PROCESS CONDITIONS IN DRAWING PROCESS
This study proposes a fast running model that interconnects input and output data for a single-pass cold bar drawing process through the use of Artificial Neural Network (ANN) and automatically generated a large volume of elasticplastic finite element (FE) analysis results. Th...
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