scholarly journals Structural Analysis of Microemulsion Formed from Polymer Surfactant Polyglycerol Esters in the Manufacturing Process

2021 ◽  
Author(s):  
Junya Kobayashi ◽  
Yuuki Kasama ◽  
Wataru Fujii ◽  
Etsuko Tominaga ◽  
Hiroki Iwase ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Manufacturing Process ◽  
Polymer Surfactant ◽  
Polyglycerol Esters

Probabilistic Structural Analysis of Annular Deformation Resistance Welding Process

2010 ◽  
Author(s):  
Shantaram S. Pai ◽  
N. Bhattacharya ◽  
Vinod K. Nagpal
Keyword(s):  
Structural Analysis ◽  
Probabilistic Analysis ◽  
Process Simulation ◽  
Manufacturing Process ◽  
Welding Process ◽  
Deformation Resistance ◽  
Resistance Welding ◽  
Simulation Code ◽  
Software Interface ◽  
Process Simulations

An effort has been ongoing to integrate manufacturing process simulations with probabilistic structural analyses in order to capture the important impacts of manufacturing uncertainties on component stress levels and life. A physics-based manufacturing process simulation code has been linked to the NESSUS structural analysis code to analyze annular deformation resistance welding manufacturing process. This paper describes the methodology developed to perform this integration, including an example. Although this effort is underway, particularly for fuller integration of a probabilistic analysis, the progress to date has been encouraging and a software interface that implements the methodology has been developed. The purpose of this paper is to report this development.

scholarly journals Safety and Structural Analysis of Polymers Produced in Manufacturing Process of .ALPHA.-Lipoic Acid

2007 ◽  
Vol 48 (5) ◽  
pp. 125-131 ◽  
Author(s):  
Hiroshi SHIMODA ◽  
Junji TANAKA ◽  
Azusa SEKI ◽  
Haruya HONDA ◽  
Seiichiro AKAOGI ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Lipoic Acid ◽  
Manufacturing Process ◽  
Alpha Lipoic Acid

scholarly journals Development of Probabilistic Structural Analysis Integrated With Manufacturing Processes

2007 ◽  
Author(s):  
Shantaram S. Pai ◽  
Vinod K. Nagpal
Keyword(s):  
Structural Analysis ◽  
Probabilistic Analysis ◽  
Manufacturing Process ◽  
Deformation Resistance ◽  
Process Models ◽  
The Other ◽  
Manufacturing Processes ◽  
Powdered Metal ◽  
Software Interface ◽  
Process Simulations

An effort has been initiated to integrate manufacturing process simulations with probabilistic structural analyses in order to capture the important impacts of manufacturing uncertainties on component stress levels and life. Two physics-based manufacturing process models (one for powdered metal forging and the other for annular deformation resistance welding) have been linked to the NESSUS structural analysis code. This paper describes the methodology developed to perform this integration including several examples. Although this effort is still underway, particularly for full integration of a probabilistic analysis, the progress to date has been encouraging and a software interface that implements the methodology has been developed. The purpose of this paper is to report this preliminary development.

scholarly journals DETERMINATION OF RESIDUAL STRESS IN THE RAIL WHEEL DURING QUENCHING PROCESS BY FEM SIMULATION

2017 ◽  
Vol 15 (3) ◽  
pp. 413 ◽  
Author(s):  
Miloš Milošević ◽  
Aleksandar Miltenović ◽  
Milan Banić ◽  
Miša Tomić
Keyword(s):  
Heat Treatment ◽  
Residual Stress ◽  
Structural Analysis ◽  
Residual Stresses ◽  
Manufacturing Process ◽  
Fem Simulation ◽  
Ansys Software ◽  
Damage Mechanisms ◽  
Quenching Process

Residual stresses of the rail wheels are influenced by heat treatment during the manufacturing process. The quenching process during the manufacturing results in the residual stresses within the rail wheel that may be dangerous for the rail wheel during its operation. Determination of the residual stress in the rail wheel is important for understanding the damage mechanisms and their influence on the proper work of rail wheels. This paper presents a method for determining the residual stresses in the rail wheel during the quenching process by using the directly coupled thermal-structural analysis in ANSYS software.

Estimation of Residual Stress Distribution in Railroad Wheels

2009 ◽  
Author(s):  
Venkata S. Sura ◽  
Sankaran Mahadevan
Keyword(s):  
Thermal Analysis ◽  
Residual Stress ◽  
Structural Analysis ◽  
Residual Stresses ◽  
Manufacturing Process ◽  
Three Dimensional ◽  
Railroad Wheel ◽  
Flux Boundary Condition ◽  
Temperature Distributions ◽  
Service Conditions

Residual stresses in railroad wheel rims significantly affect the wheel failure life; therefore, it is important to consider residual stresses for wheel failure analysis. In this paper, an advanced computational methodology is developed to estimate residual stresses developed during both the manufacturing process and under service conditions. To estimate the residual stresses in the wheel, three-dimensional decoupled thermal-structural analyses are performed. To simulate the manufacturing process, thermal analysis is performed with convection boundary conditions on the wheel surfaces. The temperature distributions obtained from this thermal analysis are input as loads for structural analysis. The results represent as-manufactured residual stresses. To simulate the thermal brake loading under service conditions, thermal analysis is performed using a heat flux boundary condition on the tread surface. Structural analysis is performed, including the estimated as-manufactured residual stress as initial stress, and using the temperature distributions obtained from thermal analysis of the on-tread braking. The resultant stresses represent the complex combination of residual stresses developed during both the manufacturing process and on-tread braking. The computed results are compared with the experimental data obtained at TTCI and the values reported in the literature.

scholarly journals Design and Analysis of Split Fixture for Gear Hobbing Machine

2018 ◽  
Vol 144 ◽  
pp. 01014
Author(s):  
Prajwal Shenoy ◽  
Naik Nithesh ◽  
Manjunath Shettar ◽  
Debarghya ◽  
Wasim Abbas
Keyword(s):  
Structural Analysis ◽  
Modal Analysis ◽  
Static Loading ◽  
Manufacturing Process ◽  
Factor Of Safety ◽  
Dynamic Loads ◽  
Gear Hobbing ◽  
Loading Case ◽  
Applied Forces ◽  
Set Up

Compared to the conventional gear hobbing fixtures, split fixture can effectively reduce job set-up time during the manufacturing process. This paper investigates the behaviour and analysis of split fixture under varying static loading conditions. Design of the part was established by considering the ability of the split fixture to carry jobs of various diameters. In order to validate the design, Static structural analysis was carried out on two positional configurations of the split fixture. A load of 1 ton was applied on the resting face of the fixture to simulate the effect of holding the job. The analysis included a study of the Stress, Deformations, and Modal analysis at different resonating frequencies to check for failure of design. By applying varying loads similar to practical conditions, it was observed that the design successfully withstood the applied forces without failure and a factor of safety of 142 was achieved in a critical loading case. Investigating the effect of dynamic loads on the Split Fixture and including auxiliary assembly components in design analysis.

scholarly journals ДИЗАЙН-ПРОЕКТУВАННЯ КОЛЕКЦІЇ ЖІНОЧОГО ОДЯГУ З ВИКОРИСТАННЯМ ТЕХНІКИ ПЕЧВОРК

2018 ◽  
pp. 66-73
Author(s):  
І. О. Приходько-Кононенко ◽  
О. В. Колосніченко ◽  
Н. В. Остапенко ◽  
Л. Р. Сіндарова
Keyword(s):  
Structural Analysis ◽  
Research Methods ◽  
Manufacturing Process ◽  
Scientific Work ◽  
Theoretical Studies ◽  
Women's Clothing

Development of an up-to-date collection of women's clothing with the use of pechwork technique based on the transformation of a creative source - the Peruvian national costume. Research methods were used: analytical, objective observation and structural analysis. The basis for the study was the scientific work of experts in the field of design of clothing and findings of experts in the field of fashion. The analysis of the manufacturing process of products in the technology of the pitchfork allowed to develop a classification of types and techniques of pectin and to develop an up-to-date collection of women's clothing using this technology of clothing modeling. On the basis of theoretical studies, the types of pechorop technique are systematized and the main principles of its application in the design of new clothing collections are proposed. Artistic-design, constructive-technological decisions of models with the use of the pechora technique were developed, a collection of women's clothing was made.

Structural analysis of the surface-layer protein of spirillum serpens by high-resolution electron microscopy

1983 ◽  
Vol 41 ◽  
pp. 738-739
Author(s):  
W. H. Wu ◽  
R. M. Glaeser
Keyword(s):  
Electron Microscopy ◽  
Surface Layer ◽  
Structural Analysis ◽  
High Resolution ◽  
Low Dose ◽  
High Resolution Electron Microscopy ◽  
Optical Diffraction ◽  
Surface Layer Protein ◽  
Morphological Unit ◽  
Resolution Electron

Spirillum serpens possesses a surface layer protein which exhibits a regular hexagonal packing of the morphological subunits. A morphological model of the structure of the protein has been proposed at a resolution of about 25 Å, in which the morphological unit might be described as having the appearance of a flared-out, hollow cylinder with six ÅspokesÅ at the flared end. In order to understand the detailed association of the macromolecules, it is necessary to do a high resolution structural analysis. Large, single layered arrays of the surface layer protein have been obtained for this purpose by means of extensive heating in high CaCl2, a procedure derived from that of Buckmire and Murray. Low dose, low temperature electron microscopy has been applied to the large arrays.As a first step, the samples were negatively stained with neutralized phosphotungstic acid, and the specimens were imaged at 40,000 magnification by use of a high resolution cold stage on a JE0L 100B. Low dose images were recorded with exposures of 7-9 electrons/Å2. The micrographs obtained (Fig. 1) were examined by use of optical diffraction (Fig. 2) to tell what areas were especially well ordered.

RNA polymerase: Preparation and structural analysis of helical polymers

1984 ◽  
Vol 42 ◽  
pp. 152-153
Author(s):  
E. Loren Buhle ◽  
Pamela Rew ◽  
Ueli Aebi
Keyword(s):  
Structural Analysis ◽  
Rna Polymerase ◽  
Molecular Level ◽  
X Ray Diffraction ◽  
Helical Polymers ◽  
X Ray ◽  
E Coli ◽  
The Past ◽  
Ordered Arrays ◽  
Low Ionic Strength

While DNA-dependent RNA polymerase represents one of the key enzymes involved in transcription and ultimately in gene expression in procaryotic and eucaryotic cells, little progress has been made towards elucidation of its 3-D structure at the molecular level over the past few years. This is mainly because to date no 3-D crystals suitable for X-ray diffraction analysis have been obtained with this rather large (MW ~500 kd) multi-subunit (α2ββ'ζ). As an alternative, we have been trying to form ordered arrays of RNA polymerase from E. coli suitable for structural analysis in the electron microscope combined with image processing. Here we report about helical polymers induced from holoenzyme (α2ββ'ζ) at low ionic strength with 5-7 mM MnCl2 (see Fig. 1a). The presence of the ζ-subunit (MW 86 kd) is required to form these polymers, since the core enzyme (α2ββ') does fail to assemble into such structures under these conditions.

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