Numerical analysis of the thin-walled structure with different trigger locations under axial load

Rogala, Michał; Gajewski, Jakub; Ferdynus, Mirosław

doi:10.1088/1757-899x/710/1/012028

Cited by 15 publications

(10 citation statements)

References 15 publications

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“…The ratio between anchor spacing (the smallest distance between the anchor axes) and the effective embedment depth is commonly singled out as a crucial factor to consider in the analysis of the group effect in cone failure [ 5 , 18 ]. Frequently, the research works in the field are computer-aided and utilize the FEM ABAQUS system, which is commonly used to describe failure mechanics [ 34 , 35 , 36 , 37 , 38 , 39 ]. The load-carrying behavior of multi-fastener anchorage systems and the theoretical mechanism of concrete rupture subject to various complex loading conditions has been explored in the works of Hüer et al and Tsavdaridisin et al [ 40 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Rock Failure Cone Size Relative to the Group Effect from a Triangular Anchorage System

et al. 2020

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This study employs the numerical analysis and experimental testing to analyze the fracturing mechanics and the size of rock cones formed in the pull-out of a system of three undercut anchors. The research sets out to broaden the knowledge regarding: (a) the potential of the undercut anchor pull-out process in mining of the rock mass, and (b) estimating the load-carrying capacity of anchors embedded in the rock mass (which is distinctly different from the anchorage to concrete). Undercut anchors are most commonly applied as fasteners of steel components in concrete structures. The new application for undercut anchors postulated in this paper is their use in rock mining in exceptional conditions, such as during mining rescue operations, which for safety considerations may exclude mechanical mining techniques, mining machines, or explosives. The remaining solution is manual rock fracture, whose effectiveness is hard to assess. The key issue in the analyzed aspect is the rock fracture mechanics, which requires in-depth consideration that could provide the assistance in predicting the breakout prism dimensions and the load-displacement behavior of specific anchorage systems, embedment depth, and rock strength parameters. The volume of rock breakout prisms is an interesting factor to study as it is critical to energy consumption and, ultimately, the efficiency of the process. Our investigations are supported by the FEM (Finite Element Method) analysis, and the developed models have been validated by the results from experimental testing performed in a sandstone mine. The findings presented here illuminate the discrepancies between the current technology, test results, and standards that favor anchorage to concrete, particularly in the light of a distinct lack of scientific and industry documentation describing the anchorage systems’ interaction with rock materials, which exhibit high heterogeneity of the internal structure or bedding. The Concrete Capacity Design (CCD) method approximates that the maximum projected radius of the breakout cone on the free surface of concrete corresponds to the length of at the most three embedment depths (hef). In rock, the dimensions of the breakout prism are found to exceed the CCD recommendations by 20–33%. The numerical computations have demonstrated that, for the nominal breakout prism angle of approx. 35% (CCD), the critical spacing for which the anchor group effect occurs is ~4.5 (a cross-section through two anchor axes). On average, the observed spacing values were in the range of 3.6–4.0.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Rock Failure Cone Size Relative to the Group Effect from a Triangular Anchorage System

et al. 2020

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“…The scope of research will include issues of linear and nonlinear analysis of composite plate structures subjected to uniform compression. The research were lead with using numerical calculations basing on the finite element method, which currently has a very wide application [24][25][26][27][28][29][30][31][32], with the ABAQUS software. Obtained numerical results were validated with experimental results obtained for physical models of the tested structures.…”

Section: Introductionmentioning

confidence: 99%

Composite plate analysis made in an unsymmetric configuartion

Falkowicz

2021

J. Phys.: Conf. Ser.

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The work presents a thin-walled plate element with the central rectangular cut-out which can be use as an elastic or load-bearing element. Plates were made of carbon epoxy laminate and subjected to uniform compression. Plates were simply supported on shorter edges, and loaded axial load. The study included analysis of the critical and weakly post-critical behavior using experimental and numerical methods. Numerical analysis was performed with using linear analysis of eigenvalue problem to determination critical loads. The second step connected nonlinear analysis of structure with initiated geometrically imperfection corresponding to the flexural-torsional buckling mode of the plate. To the numerical calculations the commercial ABAQUS program was used.

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“…The finite element method is used to solve various problems in engineering by using FEM software packages. Numerical simulation of solidification facilitates obtaining highquality castings and minimising product cost and scrap [1][2][3][4]. FEM-based software for solving casting problems has high computational capabilities for low operating costs, and advances in simulation methodology have made simulation the most widely used and accepted method in operations research and systems analysis.…”

Section: Introductionmentioning

confidence: 99%

Mould design optimisation by FEM

Ayer

Kaya

2021

J. Phys.: Conf. Ser.

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Production can be briefly defined as creating something new as a result of effort. There are many different production methods. With the industrial revolutions, the number of these methods has increased, and these methods have developed. Over time, heavy and laborious work that people had to do began to be done by machines. The casting method, which is one of the most common production methods in the world, is to pour the molten metal or its alloy into a mould cavity suitable for the shape of the desired product and remove it from the mould after it solidifies. In this study, firstly, the manufacturing method by casting was mentioned, and the difficulties of mould design in the casting method were explained. Secondly, the benefits of computer-aided simulation programs for casting are explained. As an example, a model was designed and different runners were added to this model. These models, which were prepared afterwards, were cast in a virtual environment with the FLOW-3D CAST program, which is a simulation program. Casting results and casting defects after these castings were compared and interpreted. The results show that it is important for the casting quality to keep the runner diameters as small as possible in runner designs. Two or three times more air voids are formed in the sand mould casting method compared to the permanent mould casting. Additionally, it was observed that the casting material had less shrinkage in the sand mould casting method. It is concluded that sand mould casting is disadvantageous in terms of the parameter of time.

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Numerical analysis of the thin-walled structure with different trigger locations under axial load

Cited by 15 publications

References 15 publications

Analysis of the Rock Failure Cone Size Relative to the Group Effect from a Triangular Anchorage System

Analysis of the Rock Failure Cone Size Relative to the Group Effect from a Triangular Anchorage System

Composite plate analysis made in an unsymmetric configuartion

Mould design optimisation by FEM

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