Gabriel Gârleanu
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View article: Agrifood Waste Valorization: Development of Biochar from Peach Kernel or Grape Pits for Cr6+ Removal from Plating Wastewater
Agrifood Waste Valorization: Development of Biochar from Peach Kernel or Grape Pits for Cr6+ Removal from Plating Wastewater Open
In the context of circular economy, waste generated by fruit processing can be used to produce new materials with a wide range of uses. This study presents a method to synthesize biochar from peach kernel or grape pit waste. The adsorbents…
View article: Optimization of the functional geometry of cutting tools using the finite element method (FEM) to reduce vibrations in steel machining
Optimization of the functional geometry of cutting tools using the finite element method (FEM) to reduce vibrations in steel machining Open
The research presented in this paper analyses the numerical simulation using the Finite Element Method (FEM) to study the vibration and performance of cutting tools during steel turning. The main objective is to optimize the functional geo…
View article: The technology for reconditioning an LBC Cylindrical Support Spindle
The technology for reconditioning an LBC Cylindrical Support Spindle Open
The article presents the reconditioning technology for the bearing housing of a cylindrical support spindle used in sheet rolling. Due to the pressing forces required for rolling, the bearings are subjected to extremely high stress. In thi…
View article: Welding technologies for aluminum alloy naval parts -propeller shaft guide bushing made of ALMG5
Welding technologies for aluminum alloy naval parts -propeller shaft guide bushing made of ALMG5 Open
The article presents the welding technology of a "Guide bushing - propeller shaft" type made of AlMg5 material and the problems that arise during welding depending on the way of obtaining the product (cast or rolled) and the chemical compo…
View article: Welding considerations for duplex steel sluice gates in water pipelines
Welding considerations for duplex steel sluice gates in water pipelines Open
The article presents the finding of an optimal technology for welding an oversized construction, from an LDX 2101 duplex steel. The biggest problems are related to the occurrence of stresses and deformations after welding. Also, depending …
View article: Motion and Dynamic Responses Approach for WindFloat Structures under Marine Loads
Motion and Dynamic Responses Approach for WindFloat Structures under Marine Loads Open
This paper presents performed Ansys CFX numerical simulation on WindFloat structures. The model of WindFloat was designed according to real use dimensions in DesignModeller in open sea simulation approach. Inside paper content marine loads…
View article: Increasing the Durability of Trimming Dies Used to Clean Anodes in the Aluminum Industry
Increasing the Durability of Trimming Dies Used to Clean Anodes in the Aluminum Industry Open
Increasing the durability of trimming dies used to clean anodes is a very important goal in order to reduce the costs involved in obtaining aluminum. The research focused both on choosing an optimal material for the execution of trimming d…
View article: Experimental study towards WIG welded joint. Case study: Repair by welding of X2CrNiMo17-12-2 pipes
Experimental study towards WIG welded joint. Case study: Repair by welding of X2CrNiMo17-12-2 pipes Open
Nowadays, several technological problems were raised by industrial beneficiaries regarding spiral and pipe heat exchangers repairs and thus studies were done in this regard. X2CrNiMo17-12-2, austenitic stainless steel pipes were considered…
View article: Reconditioning by Welding of the Spiral Heat Exchangers Made of Austenitic Stainless Steel - X2CRNIMO17-12-2
Reconditioning by Welding of the Spiral Heat Exchangers Made of Austenitic Stainless Steel - X2CRNIMO17-12-2 Open
The heat exchangers are playing an essential role in some widely used systems including automobiles, heating, refrigeration, air conditioning, distillation, in thermal power plants, district heating and as annexes to thermal machines. Duri…
View article: Doubling the power of a wood boiler with fixed grill
Doubling the power of a wood boiler with fixed grill Open
The article presents one technological modality of doubling the thermal power of a wood boiler. The base of departure is a wood boiler with fixed grill with a power of 30 kW and a yield of 62%. The technological variant is to increase with…
View article: Synthesis, Characterization and Sorption Capacity Examination for a Novel Hydrogel Composite Based on Gellan Gum and Graphene Oxide (GG/GO)
Synthesis, Characterization and Sorption Capacity Examination for a Novel Hydrogel Composite Based on Gellan Gum and Graphene Oxide (GG/GO) Open
A novel hydrogel composite based on gellan gum and graphene oxide (GG/GO) was synthesized, characterized and tested for sorption capacity in this work. The microstructural, thermogravimetric and spectroscopic analysis confirmed the formati…
View article: Optimization of the Technological Parameters for Obtaining Zn-Ti Based Composites to Increase the Performance of H2S Removal from Syngas
Optimization of the Technological Parameters for Obtaining Zn-Ti Based Composites to Increase the Performance of H2S Removal from Syngas Open
The realization of some composite materials that allow the best removal of H2S from syngas was the main objective of this work. Thus, the optimization of the technological parameters for obtaining composites based on Zn-Ti was achieved. Th…
View article: Effect of Chemical Composition on Hard Deposits Properties in the Case of Weld Refurbishment of Heavy Crushing Hammers
Effect of Chemical Composition on Hard Deposits Properties in the Case of Weld Refurbishment of Heavy Crushing Hammers Open
The article presents a study on the influence of chemical composition on the hardness and microstructural properties in case of crushing hammers used in stone quarries that can be refurbishment by welding, using different types of filler m…
View article: Motion and Dynamic Responses Approach for WindFloat Structures under Marine Loads
Motion and Dynamic Responses Approach for WindFloat Structures under Marine Loads Open
This paper presents performed Ansys numerical simulation on WindFloat structures. It contributes to the methodology of calculation based on CFD instruments to study the movements of the waves on semi-submersible stationary structures and h…
View article: Laparoscopic welding
Laparoscopic welding Open
The paper presents a new way of repairing defects that can occur in areas with low access for the operator. A modified TIG welding torch with a 300 mm neck length is used. The picture of the metal bath is taken over by a videoendoscopic ca…
View article: Innovative solution for repairing and increasing the operational safety of rotary drum mill spindles
Innovative solution for repairing and increasing the operational safety of rotary drum mill spindles Open
The paper present a welding repair technology for bottom of the mill as well as a constructive solution for increasing the safety in their operation. The article is structured on two main directions, a technological one - the spindle repai…
View article: Model Residual Stress by Finite Element Method
Model Residual Stress by Finite Element Method Open
This paper presents an original model developed by finite element method to simulate the behavior of the material to the method “Blind Hole Drilling”, to determine the residual stress. Modeling of this method is possible through the use of…
View article: Technological Forms Develope in Different Morphological Fields
Technological Forms Develope in Different Morphological Fields Open
The present work is takes in consideration the experimental study of the influence of some morphological fields regarding the development of the complex technological forms. The goal that we have set in this paper was to bring in new point…
View article: Model Residual Stress by Finite Element Method
Model Residual Stress by Finite Element Method Open
This paper presents an original model developed by finite element method to simulate the behavior of the material to the method “Blind Hole Drilling”, to determine the residual stress. Modeling of this method is possible through the use of…