Optimal design of a long and slender compressive strut

Byström, Johan

doi:10.1260/175095409788922275

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…When applying a load, only a unit load can be applied, and the critical load is equal to the product of all applied loads and load factors in the buckling analysis. Therefore, only a force of 1N needs to be applied at one end [10] .…”

Section: Deform-3d Finite Element Model Establishmentmentioning

confidence: 99%

Research on the destabilization of the ejector rod of cold header

Shu

Zhang

Duan

et al. 2023

Second International Conference on Advanced Manufacturing Technology and Manufacturing Systems (ICAMTMS 2023)

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Taking the ejector rod of a series of long bolts on cold heading process as the research object, the force of ejector rod is simulated and analyzed by DEFORM-3D software in order to solve the problem of ejector rod fracture encountered with actual production. The buckling of ejector rod is analyzed by Workbench software, and the relationship between the stress of M6 outer hexagon longs bolt ejector rod with different length-diameter ratios of cold heading and the critical stress of destabilization is analyzed. The critical length-diameter ratio of the ejector rod to break with unprotected condition is obtained, which agrees with the production experience of an enterprise. The finite element analysis technology provides theoretical basis of the production of long bolts and provides standard for the design of cold heading ejection mechanism.

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Section: Deform-3d Finite Element Model Establishmentmentioning

confidence: 99%

Research on the destabilization of the ejector rod of cold header

Shu

Zhang

Duan

et al. 2023

Second International Conference on Advanced Manufacturing Technology and Manufacturing Systems (ICAMTMS 2023)

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“…Typical material constants, see e.g [71], for carbon fibers are considered and are reported in Table 1.…”

Section: Materials Identificationsmentioning

confidence: 99%

A study of composite laminates failure using an anisotropic gradient-enhanced damage mean-field homogenization model

Sket

Molina-Aldareguia

et al. 2015

Composite Structures

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The failure of carbon fiber reinforced epoxy laminates is studied using an anisotropic gradient-enhanced continuum damage model embedded in a mean-field homogenization scheme. In each ply, a homogenized material law is used to capture the intra-laminar failure. The anisotropy of the homogenized material model results from the homogenization method and from the reformulation of the non-local continuum damage theory to account for the material anisotropy. As a result the damage propagation direction in each ply is predicted with accuracy as compared to the experimental results, while the problems of losing uniqueness and strain localization, which occur in classical finite element simulations when strain softening of materials is involved, can be avoided. To model the delamination process, the hybrid discontinuous Galerkin/extrinsic cohesive law method is introduced at the ply interfaces. This hybrid method avoids the need to propagate topological changes in the mesh with the propagation of the delamination while it preserves the consistency and stability in the un-cracked interfaces. As a demonstration, open-hole coupons with different stacking sequences are studied numerically and experimentally. Both the intra-and inter-laminar failure patterns are shown to be well captured by the computational framework.

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“…Downhole oil-water separation [1][2][3][4][5][6] (DOWS) is a new technology, which solves the problems of high oil well production and large separation workload in the development of high-watercut oilfields, addresses the huge investment and energy loss caused by water injection, and shows remarkable economic benefits and environmental protection effects. At present, there are two basic ways of DOWS: hydrocyclone separation technology and gravity separation technology [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Optimized Design of Oil-Water Separator for Injection and Production in the Same Well

2022

IJM

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To realize the injection and production technology in the same well for highwater-cut oil wells, the multicup isoflux oil-water separator was optimized and designed according to the separation principle similar to multicup isoflux gas anchor. In the design process, the number of openings and apertures in each layer of the separator increased step by step from top to bottom, the liquid intake of each liquid inlet was similar, and the residence time of each produced liquid in the separator was long enough. Through the analysis of the optimal combination of different segmentation methods, the number of openings and different apertures, considering the requirements of machining, parameters such as aperture size, aperture classification and the number of openings were optimized according to the principle of fluid dynamics. While ensuring that the residence time of produced liquid in the settling cups at each part exceeds 150s, this design gives full play to the role of settling cups, effectively shortens the length of downhole oil-water separator, and saves production and operating costs.

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Optimal design of a long and slender compressive strut

Cited by 5 publications

References 27 publications

Research on the destabilization of the ejector rod of cold header

Research on the destabilization of the ejector rod of cold header

A study of composite laminates failure using an anisotropic gradient-enhanced damage mean-field homogenization model

Optimized Design of Oil-Water Separator for Injection and Production in the Same Well

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