Structural analysis using line elements to model members with non-symmetric cross sections

2021 ◽  
Vol 169 ◽  
pp. 108407
Author(s):  
Edward J. Sippel ◽  
Ronald D. Ziemian ◽  
Hannah B. Blum
Keyword(s):  
Structural Analysis ◽  
Cross Sections ◽  
Line Elements

scholarly journals Design and Analysis of Crane Hook with Different Cross Sections

2018 ◽  
Vol 7 (2.32) ◽  
pp. 262 ◽  
Author(s):  
Trinath Sai Kumar ◽  
Majeti . ◽  
Md Riyaz ◽  
M V.Narayana ◽  
Murali Pathri ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Cross Sections ◽  
Major Part ◽  
Conveyer Belt ◽  
Bending Stress ◽  
Heavy Vehicles

Load is to be transported from one location to other location with the help of heavy vehicles, the load is placed on heavy vehicles with the help of crane or forklifts or conveyer belt, crane hook which bears the entire load. The weight of the load is related to dimensions and material of the hook.  The major part which is to be replaced as per load is crane hook, hook is subjected to pressure and bending stress. In the present work the crane hook of different cross sections is being analyzed on model of crane hook. The crane hook is modeled on the Solidworks and analysis using Ansys. From the structural analysis performed on crane hook the stress values based on the model and stress value modifications are found.  

scholarly journals Structural analysis of the Bogotá Anticline, Colombian Eastern Cordillera: Implications on deformational styles of the Llanos Foothills

2019 ◽  
Vol 41 (3) ◽  
pp. 15-30
Author(s):  
Daniel Barrera ◽  
Andrés Mora ◽  
Eliseo Tesón
Keyword(s):  
Structural Analysis ◽  
Cross Sections ◽  
Geological Structure ◽  
Lateral Variation ◽  
Eastern Cordillera ◽  
Proposed Model ◽  
Deformed State ◽  
Geological Map ◽  
Complex Geological Structure ◽  
Detachment Fold

In this study we describe and discuss a structural analysis of the Bogotá Anticline, based on the creation of a new geological map and structural cross sections, to propose a model of evolution for the folding. The Bogotá Anticline is a complex geological structure with important variations in vergence and geometry over very short distances. Because of that, its formation was previously associated with gravitational collapses. The Bogotá Anticline is located in the Bogotá Plateau, which is part of the axial zone of the Eastern Cordillera of Colombia. We propose that this fold displays a lateral variation that evidence different stages of deformation of a faulted detachment fold with a detachment horizon located in the Chipaque Formation. A proposed thrust fault located to the east of the structure could generate the necessary shortening for the formation of this fold. The proposed model may serve as an analogue in an earlier less deformed state for the folds observed in similar rocks of the Llanos foothills.

Structure of the Hawasina Window culmination, central Oman Mountains

1986 ◽  
Vol 77 (2) ◽  
pp. 143-156 ◽  
Author(s):  
M. P. Searle ◽  
D. J. W. Cooper
Keyword(s):  
Structural Analysis ◽  
Continental Margin ◽  
Cross Sections ◽  
Structural Evolution ◽  
Complex Model ◽  
Shelf Edge ◽  
Oman Mountains ◽  
Stacking Order ◽  
Structural History ◽  
Semail Ophiolite

ABSTRACTDetailed mapping, stratigraphic logging and structural analysis of the Hawasina Window culmination in the central Oman Mountains of Arabia reveals an extremely complex thrust geometry and structural history. The initial thrust sequence involved a southwestward propagating stacking during telescoping of the Arabian continental margin slope (Sumeini complex), and time-equivalent, more distal Tethyan basin (Hawasina and Haybi complexes) facies rocks. The Semail thrust, carrying the 12 km-thick ophiolite sequence, progressively overlaps Haybi and Hawasina duplexes towards the SW. Late stage “leap-frog” thrusts have punched Sumeini duplexes higher up into the earlier thrust stack locally reversing the normal stacking order. SW-directed thrusts and SW-facing folds in the SW and NE-directed backthrusts and NE-facing backfolds in the NE have created a fan structure cored by the Jebel Rais “pop-up” composed of Sumeini slope facies rocks.The palaeogeographic presence of a large NE-facing promontory in the Cretaceous shelf edge is inferred beneath the Window. The frontal ramp of this promontory was sufficiently large to inhibit the overthrusting of large volumes of Hawasina and Haybi complex rocks. The whole central part of the Window shows NE-facing and verging backfolds and backthrusts affecting all duplexes from the lowest Sumeini up to the Semail ophiolite. The promontory is bounded by major lateral ramps to the NW (Wadi Shafan area) and SE (Jebel Milh area). A map and four balanced cross-sections are presented here to promote a complex model for the structural evolution of the Hawasina Window.

scholarly journals Geology and deformation of the Serbo-Macedonian massif in the northern part of the Athos Peninsula, Northern Greece: Insights from two detailed cross-sections

2020 ◽  
Vol 56 (1) ◽  
pp. 167
Author(s):  
Petros Georgios Neofotistos ◽  
Markos Damianos Tranos ◽  
Renée Heilbronner
Keyword(s):  
Structural Analysis ◽  
Shear Zone ◽  
Cross Sections ◽  
Crystalline Rocks ◽  
Ultramafic Rocks ◽  
Northern Greece ◽  
Tectonic Event ◽  
Normal Contact ◽  
Facies Metamorphism ◽  
Geological Map

The Athos peninsula occupies the south-eastern part of the wider Chalkidiki peninsula in Central Macedonia, Greece. It is mainly built up by crystalline rocks belonging to the Serbo-Macedonian massif, traditionally constituting, along with the Rhodope massif, the Hellenic hinterland. According to the basic geological map of the peninsula, its northern part is mainly composed of marbles grouped into the Kerdyllion Unit, and biotite gneisses and two-mica gneisses grouped into the Vertiskos Unit of the Serbo-Macedonian massif, whereas the contact between the units is considered as a normal contact, although it has been re-evaluated as tectonic later on. Moreover, amphibolites and ultramafic rocks exist along with the previously mentioned rocks, making the geology and relationship between the two units much more complicated. Two detailed cross-sections and structural analysis permit us to revise the geology of the region concluding that the marbles, the amphibolite gneisses, formerly independent amphibolites, and the biotite gneisses belong to the Kerdyllion Unit that is strongly characterized by migmatization and anatexis, whereas the Vertiskos Unit is represented predominantly by two-mica gneisses that were not extensively, if at all, affected by these phenomena. Isoclinal folding and intense shearing with an overall top-to-the-S sense of shear resulted in the main fabric of the rocks and the mylonitic shear zone between the units. More importantly, the two-mica gneiss of the Vertiskos Unit is sandwiched between the rocks of the Kerdyllion Unit. We attribute both isoclinal folding and shearing to a Mesozoic tectonic event associated with an amphibolite facies metamorphism, leading to an Alpine reworking of the Serbo-Macedonian massif. This Alpine reworking continues during Eocene times with an ENE-WSW compression, giving rise to asymmetric to inverted folds, co-axially refolding pre-existing fabrics and structures. Our work strongly suggests that the overall structure and tectono-stratigraphy concerning the Vertiskos and Kerdyllion Units as well as the contact between them should not be based on the existence of the marbles, as traditionally followed up till now, but on the migmatization and anatexis processes that are almost absent from the rocks of the Vertiskos Unit.

Investigation of the Effect of Reinforcing Diaphragms Ribbed Panels on their Carrying Capacity

2019 ◽  
Vol 974 ◽  
pp. 577-582 ◽  
Author(s):  
A.S. Vasilyev ◽  
Olga Odinokova ◽  
Veronika P. Nazarova
Keyword(s):  
Reinforced Concrete ◽  
Structural Analysis ◽  
Cross Sections ◽  
Carrying Capacity ◽  
Bending Strength ◽  
Beam Theory ◽  
Material Nonlinearity ◽  
Limit States ◽  
Plate And Shell ◽  
Steady Load

It has been established that structural analysis of ribbed panels on the carrying capacity of standard cross-sections is presented as reinforced concrete T-shaped or I-beams. However, this approach does not allow factoring in the effect of transversal ribs (diaphragms) on the accounting result for two groups of limit states. As a rule, transversal ribs are used in slabs with a greater width and serve mainly to provide its bending strength across the width mode transversely. It should be mentioned that a slab is calculated according to the beam theory based on structural mechanics models that characterize its behavior approximately in either direction along standard cross-sections. The theory of plate and shell can define the behavior under steady load of such a slab more precisely. However, applying this theory is attended with certain difficulties because of steel collaboration in multiple directions, as well as having material nonlinearity in the model. The work investigates ribbed floor panels which are modeled using modern software. The authors studied samples with prestressed and nonprestressed reinforcing as well as with or without transversal ribs. Finally, the authors find out that it is worth considering transversal ribs with regard to their reinforcement in stress calculations for standard cross-sections along a slab length. It can contribute to the development of correcting coefficients and specification of the section of the calculating theory of building constructions. The authors obtained innovative outcomes.

scholarly journals Structural study of Nahr Umr Oil Field in Southern Iraq

2016 ◽  
Vol 6 (2) ◽  
pp. 27-46
Author(s):  
Manal Shakir Al-kubaisi ◽  
Aymen Adil Lazim
Keyword(s):  
Structural Analysis ◽  
Cross Sections ◽  
Oil Field ◽  
Arabian Plate ◽  
Fold Axis ◽  
Contour Maps ◽  
Tectonic Events ◽  
Left Limb ◽  
Regional Tectonic ◽  
The Right

Nahr Umr oil field is one of the important productive southern Iraqi oil fields. This studyfocuses on the type of fold and faults of the Nahr Umr oil field. A structural analysis(geometric and genetic analyses) performed to identify its type, origin and to find its relevanceto main regional tectonic events. The structural classifications employed well and geophysicaldata through using structure contour maps, cross sections, and seismic section.The structural analysis inferred that fold of Nahr Umr oil field classified as antiform, upright,non-plunge, gentle, supratenous, dome feature, and asymmetrical. The limbs are unequalwhereas the length of left limb shorter than the right limb and its dip is greater than right limb.In addition, the thickness of crest is less than the thickness of limbs. Pattern of faults classifiedas compound, parallel, conjugates and radial with graben structure and these faultsconcentrated on crest of fold. The fold axis is almost N-S at early cretaceous and then clearlyturns to NW-SE and this may due to counterclockwise rotation of Arabian plate. Geophysicalinterpretations and results of structural analysis stated that Nahr Umr oil field formed by threecombined forces which are tectonic movements, reactivated basement, and salt structures.

Analysis of STEM micrographs of thick objects

1978 ◽  
Vol 36 (2) ◽  
pp. 106-107
Author(s):  
S. Golladay
Keyword(s):  
Inelastic Scattering ◽  
Multiple Scattering ◽  
Mass Distribution ◽  
Cross Sections ◽  
Phase Contrast ◽  
Image Point ◽  
Contrast Effects ◽  
Total Cross Sections ◽  
Elastic And Inelastic Scattering

The theory of multiple scattering has been worked out by Groves and comparisons have been made between predicted and observed signals for thick specimens observed in a STEM under conditions where phase contrast effects are unimportant. Independent measurements of the collection efficiencies of the two STEM detectors, calculations of the ratio σe/σi = R, where σe, σi are the total cross sections for elastic and inelastic scattering respectively, and a model of the unknown mass distribution are needed for these comparisons. In this paper an extension of this work will be described which allows the determination of the required efficiencies, R, and the unknown mass distribution from the data without additional measurements or models. Essential to the analysis is the fact that in a STEM two or more signal measurements can be made simultaneously at each image point.

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

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