Case study of residual stresses distribution in steel welded parts using ultrasound

Residual stresses occur in every welded manufactured structure. Different studies aimed to classify the methods of investigating the residual stresses and to highlight the advantages and disadvantages/limits of each of them. The conclusion is that ultrasonic investigation permits the evaluation of bulk stress state of welded components with acceptable accuracy. Our past research has addressed various aspects of ultrasonic investigation of residual stresses in welded steel parts: different cases of the analysis of residual stresses, edge effect on analyses of residual stresses. The purpose of this paper is to continue the previous research by introducing a new case: comparative study of equal size samples obtained by splitting an initial sample. The probe was conceived as a frame with a detachable side. After welding, the assembly is processed on a grinding machine to ensure parallel surfaces. The sample, as obtained, is ultrasonic investigated as part. After that, the detachable side is removed and the resulted part is split in six equal samples. Every so obtained sample was investigated and results are presented. New direction for future research is proposed

Case study of residual stresses distribution in steel welded parts using ultrasound

Residual stresses occur in every welded manufactured structure. Different studies aimed to classify the methods of investigating the residual stresses and to highlight the advantages and disadvantages/limits of each of them. The conclusion is that ultrasonic investigation permits the evaluation of bulk stress state of welded components with acceptable accuracy. Our past research has addressed various aspects of ultrasonic investigation of residual stresses in welded steel parts: different cases of the analysis of residual stresses, edge effect on analyses of residual stresses. The purpose of this paper is to continue the previous research by introducing a new case: comparative study of equal size samples obtained by splitting an initial sample. The probe was conceived as a frame with a detachable side. After welding, the assembly is processed on a grinding machine to ensure parallel surfaces. The sample, as obtained, is ultrasonic investigated as part. After that, the detachable side is removed and the resulted part is split in six equal samples. Every so obtained sample was investigated and results are presented. New direction for future research is proposed

Configuring a system for hydraulic oil contamination management

Through contamination, we can understand anything foreign to a hydraulic system. In this paper we only refer to particle contamination. Analyzing and optimizing processes with regard to component cleanliness and fluid purity is the target of contamination management. The paper proposes a conceptual installation solution for the use of particle counters in order to optimize the measurement process. There is also a way of using the facility within a contamination management system

Configuring a system for hydraulic oil contamination management

Through contamination, we can understand anything foreign to a hydraulic system. In this paper we only refer to particle contamination. Analyzing and optimizing processes with regard to component cleanliness and fluid purity is the target of contamination management. The paper proposes a conceptual installation solution for the use of particle counters in order to optimize the measurement process. There is also a way of using the facility within a contamination management system

Construction of Patent Claims Using Axiomatic Design

Patent claims play an important role in every patent case and it is the core for evaluation of infringement, validity or originality. There are two main types of claims: the independent claims (stand on their own), and the dependent claims (depending on a single/several claim/claims). Axiomatic design is a design theory that is based on the axioms. The axiomatic design theory makes use of corollaries and theorems which guide/help designers mapping functional domain to physical domain. The relation between functional requirements and design parameters is assured by so called design matrix. In an ideal design the number of design parameters is equal to the number of functional requirements, and the functional requirements are always kept independent from each other. When there are more design parameters than functional requirements, the design is a redundant design. A coupled design can became decoupled by selecting different set of design parameters. The idea of construction of patent claims using Axiomatic Design is based on the assumption of independent claims as a part of an ideal design and dependent claims as a part of a decoupled design

Construction of Patent Claims Using Axiomatic Design

Patent claims play an important role in every patent case and it is the core for evaluation of infringement, validity or originality. There are two main types of claims: the independent claims (stand on their own), and the dependent claims (depending on a single/several claim/claims). Axiomatic design is a design theory that is based on the axioms. The axiomatic design theory makes use of corollaries and theorems which guide/help designers mapping functional domain to physical domain. The relation between functional requirements and design parameters is assured by so called design matrix. In an ideal design the number of design parameters is equal to the number of functional requirements, and the functional requirements are always kept independent from each other. When there are more design parameters than functional requirements, the design is a redundant design. A coupled design can became decoupled by selecting different set of design parameters. The idea of construction of patent claims using Axiomatic Design is based on the assumption of independent claims as a part of an ideal design and dependent claims as a part of a decoupled design