scholarly journals Prediction of weldment mechanical properties in GMAW with robot-assisted using fuzzy logic systems

2021 ◽  
Author(s):  
P. Devendran ◽  
P. Ashoka Varthanan
Keyword(s):  
Mechanical Properties ◽  
Membership Function ◽  
Orthogonal Array ◽  
Fuzzy System ◽  
Research Work ◽  
Welding Process ◽  
Rule Base ◽  
Inference System ◽  
Material Characteristics

Abstract Welding operation decides the quality of product standards in all metal work products like automobiles, aerospace vehicles, and many more. The quality of the welding process is more reliable by automating the process with robots. In this research work, the GMAW operation is automated with the “Fanuc Robot Arc mate 100iC/12” robot. The material characteristics such as ultimate tensile strength, hardness, and impact strength of weldments are predicted using a fuzzy system using triangular membership function (TrMF) and trapezoidal membership function (TMF). The simulated results are validated by comparing with experimental work, the experiments are designed using orthogonal array L18, and material characteristics are studied using fractography test. The fuzzy system is trained with experimental results using the IF-Then rule base with the help of the L18 orthogonal array. The inference system has predicted the accuracy rate of weldment mechanical properties, showing a lower error rate.

SOFTWARE REUSABILITY MODEL FOR PROCEDURE BASED DOMAIN-SPECIFIC SOFTWARE COMPONENTS

2008 ◽  
Vol 18 (08) ◽  
pp. 1063-1081 ◽  
Author(s):  
PARVINDER SINGH SANDHU ◽  
HARDEEP SINGH
Keyword(s):  
Software Metrics ◽  
Semantic Analysis ◽  
Research Work ◽  
Matrix Decomposition ◽  
Probabilistic Latent Semantic Analysis ◽  
Rule Base ◽  
Software Components ◽  
Reusable Components ◽  
Taguchi Analysis

Automatic reusability appraisal is helpful in evaluating the quality of developed or developing reusable software components and in identification of reusable components from existing legacy systems; that can save cost of developing the software from scratch. But the issue of how to identify reusable components from existing systems has remained relatively unexplored. In this paper, we mention a two-tier approach by studying the structural attributes as well as usability or relevancy of the component to a particular domain. We evaluate Probabilistic Latent Semantic Analysis (PLSA) approach, LSA's Singular Value Decomposition (SVD) technique, LSA's Semi-Discrete Matrix Decomposition (SDD) technique and Naïve Bayes approach to determine the Domain Relevancy of software components. It exploits the fact that Feature Vector codes can be seen as documents containing terms — the identifiers present in the components — and so text modeling methods that capture co-occurrence information in low-dimensional spaces can be used. In this research work, structural attributes of software components are explored using software metrics and quality of the software is inferred by Neuro-Fuzzy (NF) Inference engine, taking the metric values as input. The influence of different factors on the reusability is studied and the condition for the optimum reusability index is derived using Taguchi Analysis. The NF system is optimized by selecting initial rule-base through modified ID3 decision tree algorithm in combination with the results of Taguchi Analysis. The calculated reusability value enables to identify a good quality code automatically. It is found that the reusability value determined is close to the manual analysis used to be performed by the programmers or repository managers. So, the system developed can be used to enhance the productivity and quality of software development.

Enhancing Quality of Learning Experience Through Intelligent Agent in E-Learning

2017 ◽  
Vol 25 (01) ◽  
pp. 31-52
Author(s):  
S. Bhattacharya ◽  
S. Chowdhury ◽  
S. Roy
Keyword(s):  
Fuzzy Inference ◽  
Learning Experience ◽  
Fuzzy Rule ◽  
School Level ◽  
Rule Base ◽  
Learning Tools ◽  
Inference System ◽  
Fuzzy Rule Base ◽  
Quality Of Learning

In this paper an interactive recommending agent is proposed which helps an e-learner to enhance the quality of learning experience resulting in efficient achievement of learning objectives. The agent achieves this with the help of a fuzzy rule base working on a variety of learning materials and recommending the appropriate learning path through them. In a learner-centric environment the learning behaviour of a learner may vary to a great extent due to the characteristics of the learner and his environment. Students are often misled while choosing the appropriate path of web learning tools owing to non-availability of a human teacher/guide. By the response of a learner to different positive and negative motivation factors the proposed system employs a fuzzy machine that is fed with realization parameters e.g. Satisfied, Depressed etc. The fuzzy machine working on the paradigm of fuzzy inference system processes these realization parameters with the help of a fuzzy rule base to produce the crisp measures of the learner’s cognitive states in terms of Belief, Behaviour and Attitude. On the basis of these defuzzified crisp diagnostic parameters the proposed system will enhanced the quality of learning experience of an e-learner. To ensure this the system will provide more detailed discussion on the subject matter along with some additional learning tools. Learners often get confused to select the proper tools among various. Therefore the proposed system will also suggest most popular path among those learners with the same understanding. This recommendation comes from the analysis of data mining result. The system was tested with a wide variety of school-level students. The response obtained indicates that it is able to enhance the quality of learning experience through its recommendation.

scholarly journals A Review on Comparison of Mechanical Properties of Dissimilar Steels Welded By TIG and MIG

2020 ◽  
Vol 184 ◽  
pp. 01030
Author(s):  
D. Suresh Kumar ◽  
Pendem Srikar
Keyword(s):  
Mechanical Properties ◽  
Chemical Properties ◽  
Welding Process ◽  
Dissimilar Steels ◽  
Common Process ◽  
Steel Joints ◽  
Physical And Chemical ◽  
Welding Technique ◽  
And Chemical Properties

In this review the study will be carried out on comparison of Mechanical Properties like Hardness and Strength of joints welded by TIG and MIG processes. Welding of dissimilar steels has became most common process now days in wide applications in industries. The Stainless Steel and Mild Steel joints have more applications in structural industries which provide good combination of Mechanical Properties like strength, Corrosion resistance etc. Selections of welding process for different material are difficult because of their physical and chemical properties. To obtain good quality of weld, it is necessary to select proper welding technique according to the materials selected for welding

Method and Technologies Functional Constructive Configuration Concept of a Flexible Unconventional Hybrid FSW-US Welding Process

2019 ◽  
Vol 1153 ◽  
pp. 85-91
Author(s):  
Octavian Victor Oancă ◽  
Nicușor Alin Sîrbu ◽  
Emilia Florina Binchiciu ◽  
Gabriela Victoria Mnerie ◽  
Ion Aurel Perianu
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Ultrasonic Vibration ◽  
Welding Process ◽  
Metallic Materials ◽  
Friction Stir

The hybrid unconventional technology friction stir welding assisted by ultrasonic vibration (FSW-US) is a technology that is of interest internationally, it provides certain advantages in improving the behavior of welding components during their processing, as well as their mechanical properties and quality of joints resulted from our experiments. Within ISIM Timisoara, we aim to develop specialized non-conventional welding technologies and experimental modules (FSW-US) designed to make joints for metallic and non-metallic materials, with industrial and applications pre-competitive.

A comprehensive review on the effect of precipitation on mechanical properties of friction stir welded aluminium alloys

2021 ◽  
pp. 095440622110115
Author(s):  
C Shyamlal ◽  
S Rajesh ◽  
S Suresh Kumar
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloys ◽  
Joint Strength ◽  
Welded Joint ◽  
Welding Process ◽  
Processing Parameters ◽  
Noticeable Effect ◽  
Comprehensive Review ◽  
Friction Stir

Friction Stir Welding (FSW) is one of the excellent metals joining processes in terms of joint strength efficiency, quality of the weld and eco-friendliness. The strength of the joint and quality of the weld depend upon the FSW processing parameters. This paper aims to provide overview of the FSW process by considering the effect of alloying elements and its precipitates on mechanical properties of aluminium and its alloys. The importance of grain growth and its effect on mechanical properties after welding is also analysed and discussed in detail. The interesting observation is that the precipitates and its size, residual stress play an important role in changing the hardness, tensile strength and fatigue strength across the weld zones. In general, the hardness of the stir zone is lesser when compared to base metal and this is noticed for all series of aluminium and its alloys, irrespective of the precipitates and its structure. Grain size and its morphology also have significant role in affecting the mechanical properties of the welded joint and it is found that post welding process has noticeable effect on the mechanical properties closer to base aluminium and its alloys.

scholarly journals Valorization of granite micronized stones wastes for eco-friendly production of fired clay bricks

2021 ◽  
Vol 3 (11) ◽  
Author(s):  
Blasius Ngayakamo ◽  
Gbetoglo Charles Komadja ◽  
Abdulhakeem Bello ◽  
Azikiwe Peter Onwualu
Keyword(s):  
Mechanical Properties ◽  
Raw Materials ◽  
Research Work ◽  
Fine Powder ◽  
Value Added ◽  
Engineering Properties ◽  
Chemical Compositions ◽  
Clay Bricks ◽  
Granite Powder

AbstractConstruction and mining industries around the globe have been criticized for production of enormous solid wastes that have potential environmental impacts. Therefore, this study presents a feasible approach to recover and utilize granite micronized stones waste for production of eco-friendly bricks. This research work, aimed at substituting a natural clay with granite powder to produce value-added bricks with pronounced physical–mechanical properties. The micronized granite waste stones were crushed and ground to obtain a fine powder sample. Thereafter, different batch compositions containing a varied proportions of granite powder were prepared and fired at different sintering temperatures: 900, 1000 and 1100 °C. The raw materials and bricks were characterized for their chemical compositions, microstructural, mineralogical and physical–mechanical properties. The results showed that, an increase in granite waste powder and sintering temperature enhanced the quality of fired clay bricks in terms of mechanical strength and decreased simultaneously the apparent porosity and water absorption. The final experimental approach showed that, the possibility to produce eco-friendly bricks containing up to 30 wt% of granite powder with enhanced engineering properties fired at 1100 °C is promising. Graphic abstract

Quality index improving of the electric-welded K55 pipes

2021 ◽  
pp. 49-53
Author(s):  
R. V. Sulyagin ◽  
◽  
M. N. Mozzhegorov ◽  
A. O. Struin ◽  
A. G. Varnak ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Welded Joint ◽  
Welding Process ◽  
Local Heat ◽  
Pipe Production ◽  
Customer Requirements ◽  
Key Factors ◽  
Main Pipelines ◽  
Acceptance Tests

The pipes manufacturing process with using the high frequency welding process (HFW) is widely applied for the producing of casing pipes, pipes for infield, supply and main pipelines. One of the criteria for meeting pipes to customer requirements is to provide the necessary mechanical properties of the pipe body and the welded joint. The analysis of forming, welding and local heat treatment of the welded joint was carried out during mastering of K55 pipe production. Metallographic researches of the base metal and welded joint were carried out. Pipes acceptance tests have been performed in accordance with API 5CT requirements. Based on the results of the researches and tests, the key factors influencing on the microstructure of the welded joint were identified. The technology of thermomechanical treatment of the welded joint has been developed. New modes of forming and welding have been applied, which make it possible to reduce the effect of the actual anisotropy of metal in terms of the yield strength and ultimate strength on the quality of the finished product. This article describes one of the possible options for obtaining a set of mechanical properties in accordance with the requirements of the API 5CT for HWF pipes.

Effect of Pre and Post Weld Heat Treatment on the Mechanical Properties of Friction Stir Welded AA6061-T6 Joint

2020 ◽  
Vol 17 (2) ◽  
pp. 7882-7889 ◽  
Author(s):  
J.C. Verduzco Huarez ◽  
R. Garcia Hernandez ◽  
G. M. Dominguez Almaraz ◽  
J.J. Villalón López
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Tensile Strength ◽  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Research Work ◽  
Base Material ◽  
Welding Process ◽  
Post Weld Heat Treatment ◽  
Friction Stir

This research work focuses on the study of the improvement of mechanical properties, specifically the tensile strength of 6061-T6 aluminum alloy on prismatic specimens with 9.5 mm thickness that has been subjected to friction stir welding process and two heat treatments; solubilized and aging before or after the welding process. Three cases studied and evaluated were, welding of the base material without heat treatment (BMW), solubilized heat treatment and partial aging of the base material before welding (HTBW), and heat treatment of solubilized and aging of the base material after welding (HTAW). The obtained results show an increase of about 10% (20 MPa) of tensile strength for the HTBW process, compared to BMW case. In addition, for the case of HTAW, the obtained tensile resistance presents a joint efficiency of 96%, which is close to the tensile strength of the base material (»310 MPa).

scholarly journals MAG Welding of Structures Used in Means of Transport and Made of Steel DOCOL 1200M

2020 ◽  
pp. 65-71
Author(s):  
Bożena Szczucka-Lasota ◽  
Tomasz Węgrzyn ◽  
Bogusław Łazarz ◽  
Adam Jurek ◽  
Krzysztof Ireneusz Wilczyński
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Research Work ◽  
Welding Parameters ◽  
Shielding Gases ◽  
High Tensile Strength ◽  
Moving Platform ◽  
Interpass Temperature ◽  
Made In

Steels of the DOCOL group, characterised by high tensile strength and yield point, play an important role in the manufacturing of means of transport. However, the above-named steels are difficult to weld and joints made in them do not guarantee comparable mechanical properties. The research work discussed in the article aimed to determine process parameters suitable for the welding of a moving platform made of steel DOCOL 1200M as well as to assess the effect of welding parameters on the quality of obtained joints. The tests also involved analysing the effect of shielding gases, preheating and interpass temperature on the quality of an 8 mm thick MAG welded moving platform structure.

Studies Regarding Production of the Moulding Form from Calcined Gypsum

2013 ◽  
Vol 837 ◽  
pp. 206-211
Author(s):  
Gheorghe Simionescu ◽  
Mirela Gheorghian
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Sodium Chloride ◽  
Boric Acid ◽  
Zinc Chloride ◽  
Research Work ◽  
Mechanical Resistance ◽  
Calcined Gypsum ◽  
Wax Models

In the pressing form made from calcined gypsum fixed in metal, wax can be cast with pressure. The device used to tide the pressing form should not bend. If the handling work is done carefully and correct one pressing form made from gypsum can be used for multiple wax models. To be used in construction the pressing forms, calcined gypsum must meet certain requirements regarding its constitution and functionality. To provide these requirements research work must be done to investigate characteristics such as: minimum compressive strength (wet and dry state), hardening time of calcined gypsum, gypsum dilatation after curing. To produce the pressing forms from calcined gypsum the following methods and operations have been used: operations concerning production of gypsum with the best physicochemical and mechanical properties in order to be used for construction of pressing forms (determining the quality of gypsum based on water and plaster ratio; establishing the influence of epoxy and curing solution on the mechanical resistance of the obtained gypsum; determining the influence of lime, boric acid, zinc chloride, sodium chloride on the hardening period of calcined gypsum); production of the models from wood and metal; fixing the model on the gypsum cushion; finding on the model the separation line and restrict the area used for gypsum moulding; applying grease on the model, on the plate under the model, on the walls and on all parts that come in contact with liquid gypsum to be poured; preparation of the gypsum solution.

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