BENDING STRENGTH OF STEEL COLUMN MEMBERS WITH PARTIAL PENETRATION GROOVE WELDED JOINTS

1994 ◽  
Vol 59 (459) ◽  
pp. 153-161
Author(s):  
Yoshitaka YABE ◽  
Shinichi SAKAMOTO ◽  
Kei YAKUSHIJI
Keyword(s):  
Welded Joints ◽  
Bending Strength ◽  
Partial Penetration ◽  
Steel Column

scholarly journals Bending Strength of Welded Joints in TMCP Steel Square Tubular Profiles “T” Connexions

2016 ◽  
Vol 5 (3) ◽  
pp. 70
Author(s):  
Rafael Luciano Dalcin ◽  
Ivan Guerra Machado ◽  
Arnaldo Ruben Gonzalez ◽  
Cintia Cristiane Petry Mazzaferro
Keyword(s):  
Tensile Strength ◽  
Welded Joints ◽  
Bending Strength ◽  
Mechanical Efficiency ◽  
Structural Steels ◽  
Detailed Data ◽  
Welded Structures ◽  
Longitudinal Joints ◽  
Longitudinal Welds ◽  
Loading Axis

The use of DOMEX 700 MCTM steel weldments is still little explored, due to some concern of the validity of the rules imposed by several standards and Codes for this class of steel. This material has low ductility and consequently the relation between tensile strength and yield strength is significantly lower than ordinary structural steels. For this reason, the instability phenomena are more critical than the instability phenomena of ordinary structural steels. Therefore, the aim of this study was to obtain detailed data on the mechanical efficiency of joints welded by GMAW. Six different heat inputs were used on square tubular profiles of TMCP steel. The tubular profiles were placed as a column/beam weldment with transverse and longitudinal welds positioned in relation to the loading axis. Twelve welded structures were instrumented with extensometer and tested in simple bending. Comparing the obtained data, it was verified that longitudinal welded joints presented higher bending strength than transversal welded joints. In the case of longitudinal joints, two weld beads were subjected to bending efforts, and in the case of transverse joints, only one weld bead resisted bending forces.

scholarly journals Effect of TIG and FSW Welding Processes on Mechanical Properties of Al-4.2Mg-0.6Mn-0.4Sc-0.1Zr Alloy

2021 ◽  
Vol 71 (2) ◽  
pp. 299-304
Author(s):  
Srinivasa Rao Mallipudi ◽  
Tangudu Sai Shankar ◽  
Perumalla Srikar ◽  
Uppda Bhanoji Rao ◽  
Yandra Chandrasekhar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Welded Joints ◽  
Bending Strength ◽  
Welded Joint ◽  
Testing Machine ◽  
Base Material ◽  
Material Strength ◽  
Test Machine ◽  
Friction Stir ◽  
Welding Processes

Abstract In this study, friction stir welding (FSW) and Tungsten gas welding (TIG) processes were used to weld 5 mm thick Al-4.2Mg-0.6Mn-0.4Sc-0.1Zr alloy plates. The FSwelds and TIG welds were tested for mechanical properties (hardness, ultimate tensile strength, bending strength and impact strength) by means of vicker’s hardness machine, universal testing machine and impact test machine respectively. The strength of the base material was higher, compared to the strength of the FSW and TIG welded joints. The strength of the TIG welded joint decreased, compared to the strength of the FSW welded joint. The microstructure features were also observed for base material with the aid of metallurgical microscope and compared the same with the microstructures of FSW and TIG welded joints. FSW change the material strength due to fine-grain refinement in the stir zone in Al-4.2Mg-0.6Mn-0.4Sc-0.1Zr alloy and therefore FS welded joint exhibited 91.6% joint efficiency followed by the TIG welded joint of 69.8%.

Effect of Corrosion and Inclined Angle on Static Strength of Fillet-Welded Joint of 500 MPa-Class Steel

2005 ◽  
Author(s):  
Hisoa Matsushita ◽  
Tatsuro Nakai ◽  
Norio Yamamoto
Keyword(s):  
Shear Strength ◽  
Weld Metal ◽  
Welded Joints ◽  
Stress Condition ◽  
Bending Strength ◽  
Welded Joint ◽  
Static Strength ◽  
Ship Hull ◽  
R Ratio ◽  
Class Steel

There are reported cases of serious accidents in ship hull structures of aged ships due to corrosion of steel after long period of use. This paper presents basic information on the effect of corrosion on static strength, that is, tensile strength, bending strength and shear strength, of fillet-welded joints of 500MPa-class steel used for ship hull construction. It is based on experimental results using specimens made of material of corroded fillet-welded joints of actual old ships and as-fabricated fillet-welded joint and simulated corroded fillet-welded joint. And also the effect of inclined angles on perpendicular direction shear strength of fillet-welded joint is investigated. Basically, static strength of the fillet-welded joint is affected by the (R) ratio of thickness of steel plates to total thickness of throat of the weld metal. When R was greater than 1.0, fracture occurred at weld metal under tensile stress condition or shear stress condition. However, under bending stress condition fracture at weld metal occurred when R was greater than 1.4. The effect of inclined angles on shear strength of fillet-welded joints is also presented.

scholarly journals Experimental Comparison of the MIG and Friction Stir Welding Processes for AA 6005 Aluminium Alloy

2015 ◽  
Vol 651-653 ◽  
pp. 1480-1486 ◽  
Author(s):  
Serafino Caruso ◽  
Davide Campanella ◽  
Sebastiano Candamano ◽  
Claudia Varrese ◽  
Fortunato Crea ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Welded Joints ◽  
Bending Strength ◽  
Experimental Comparison ◽  
Friction Stir Weld ◽  
Process Conditions ◽  
Al Alloy ◽  
Friction Stir ◽  
Advantages And Disadvantages ◽  
Welding Processes

In this study, the mechanical properties of welded joints of AA 6005 aluminum alloy obtained with friction stir welding (FSW) and conventional metal inert gas welding (MIG) are studied. FSW welds were carried out on a semi-automatic milling machine. The performance of FSW and MIG welded joints were identified using tensile and bending impact tests, as far as the environmental aspects are also included in the discussion. The joints obtained with FSW and MIG processes were also investigated in their microstructure. The results indicate that, the microstructure of the friction stir weld is different from that of MIG welded joint. The weld nugget consists of small grains in FSW than those found in MIG weld. Taking into consideration the process conditions and requirements, FSW and MIG processes were also compared with each other to understand the advantages and disadvantages of the processes for welding applications of studied Al alloy. Better tensile and bending strength were obtained with FSW welded joints.

Study Of Structure Formation Of Organic-Mineral Compositions With Fibrous Filler By Electron Microscopy Method

2019 ◽  
pp. 41-47
Keyword(s):  
Electron Microscopy ◽  
Structure Formation ◽  
Mineral Composition ◽  
Bending Strength ◽  
Cement Stone ◽  
Hydrated Cement ◽  
Fibrous Filler ◽  
Organic Mineral ◽  
Microscopy Method ◽  
Mineral Compositions

The article presents the study of processes of structure formation of cement stone and products of hardening of organic-mineral compositions with fibrous filler (shavings) by the electronic scanning microscopy method. It is established that the additive-free cement stone at the age of 28 days has a dense and homogeneous structure, consists of calcium hydro-silicates, Portlandite and calcite - newgrowths characteristic for cement systems. Cellulose fibers, which make up the bulk of the substance of shavings, are sufficiently active, which determines the high adhesion of the hydration products of the cement binder to their surface. It is shown that the introduction of shavings into the organo-mineral composition leads to inhibition of cement hydration processes. Organo-mineral compositions with different shavings content (two compositions) were analyzed. The first composition is characterized by a fairly dense structure, the cement stone consists of globular nanoscale nuclei of hydrosilicates, Portlandite and calcite. The second composition has a loose porous structure, cement stone consists of non-hydrated cement grains, newgrowths are represented by calcite and vaterite. The structure of the contact zone "osprey fiber-cement stone" in the organo-mineral composition of the first composition indicates a good adhesion of the filler surface with the phases of hydrated cement. The use of shavings as a fibrous filler (the first composition) increases the tensile and bending strength, as well as the wear resistance of organo-mineral compositions. The data obtained by scanning electron microscopy are confirmed by the results of studying the processes of structure formation of cement stone by quantitative x-ray phase analysis.

Performance enhancement of normal contact ratio gearing system through correction factor

2019 ◽  
Vol 13 (3) ◽  
pp. 5242-5258
Author(s):  
R. Ravivarman ◽  
K. Palaniradja ◽  
R. Prabhu Sekar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Correction Factor ◽  
Bending Strength ◽  
Performance Enhancement ◽  
Transmission Ratio ◽  
Contact Ratio ◽  
Element Analysis ◽  
Normal Contact ◽  
Root Region

As lined, higher transmission ratio drives system will have uneven stresses in the root region of the pinion and wheel. To enrich this agility of uneven stresses in normal-contact ratio (NCR) gearing system, an enhanced system is desirable to be industrialized. To attain this objective, it is proposed to put on the idea of modifying the correction factor in such a manner that the bending strength of the gearing system is improved. In this work, the correction factor is modified in such a way that the stress in the root region is equalized between the pinion and wheel. This equalization of stresses is carried out by providing a correction factor in three circumstances: in pinion; wheel and both the pinion and the wheel. Henceforth performances of this S+, S0 and S- drives are evaluated in finite element analysis (FEA) and compared for balanced root stresses in parallel shaft spur gearing systems. It is seen that the outcomes gained from the modified drive have enhanced performance than the standard drive.

Sign in / Sign up

Export Citation Format

Share Document