Free and forced vibration analyses using the four-node quadrilateral element with continuous nodal stress

Yang, Yongtao; Chen, Li; Xu, Dong; Zheng, Hong

doi:10.1016/j.enganabound.2016.05.005

Cited by 10 publications

(2 citation statements)

References 48 publications

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“…Similarly, ANSYS shell mesh quadrilateral automatic approach was used with curvature shape function, for two types of elements: four nodes (QUAD4) and eight nodes (QUAD8). This type of elements is the most used in surface type geometries, due to its higher results accuracy, compared with results obtained with triangular elements such as TRI3 or TRI6 26 .…”

Section: Model Sensitivity Studymentioning

confidence: 99%

Effects of seawater immersion on a glass fibre reinforced bioepoxy mechanical properties and its application in the ship hull finite-element analysis

Parra

Ramón-Valencia

López-Arraiza³

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Currently, there is a grown tendency to manufacture environmentally more sustainable composite structures. In this work, a glass fibre reinforced bioepoxy composite was manufactured and submerged in seawater between T = 17[Formula: see text]C and T = 24[Formula: see text]C for a bioactivity period of 6 months. Tensile and flexural tests were performed in order to characterize the new composite before and after seawater immersion. A drop of 20% in Young’s modulus and 9% in tensile strength were observed after immersion. The same trend was analysed in both the flexural modulus and flexural strength, with a fall of 18% and 6%, respectively. It is also remarkable a higher ductility of the specimen after seawater immersion due to a plasticization process by moisture absorption. Those results were confirmed by scanning electron microscopy. Given the mechanical behaviour of the new composite, an L = 6.26 m in length ship hull was designed. Structural analysis was conducted on the suitability and reliability of the composite by using ANSYS software. The simulations revealed the optimal structural performance of the new design even in the extreme sagging situation. To sum up, SuperSap® bioepoxy resin is a suitable matrix to manufacture small glass fibre ship-hulls.

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Section: Model Sensitivity Studymentioning

confidence: 99%

Effects of seawater immersion on a glass fibre reinforced bioepoxy mechanical properties and its application in the ship hull finite-element analysis

Parra

Ramón-Valencia

López-Arraiza³

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…FE-Meshfree elements are also free from the LD problem which exists in many of the PUM-based finite elements. PU-based FE-Meshfree method has already been applied successfully within statics, free vibration [48,49], forced vibration [50], geometric nonlinearity [51,52], acoustic engineering [53], and other fields.…”

Section: Introductionmentioning

confidence: 99%

FE‐Meshfree QUAD4 Element with Modified Radial Point Interpolation Function for Structural Dynamic Analysis

Zhang

Chen

Qian

et al. 2019

Shock and Vibration

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The partition-of-unity method based on FE-Meshfree QUAD4 element synthesizes the respective advantages of meshfree and finite element methods by exploiting composite shape functions to obtain high-order global approximations. This method yields high accuracy and convergence rate without necessitating extra nodes or DOFs. In this study, the FE-Meshfree method is extended to the free and forced vibration analysis of two-dimensional solids. A modified radial point interpolation function without any supporting tuning parameters is applied to construct the composite shape functions. The governing equations of elastodynamic problem are transformed into a standard weak formulation and then discretized into time-dependent equations which are solved via Bathe time integration scheme to conduct the forced vibration analysis. Several numerical test problems are solved and compared against previously published numerical solutions. Results show that the proposed FE-Meshfree QUAD4 element owns greater tolerance for mesh distortion and provides more accurate solutions.

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Smoothed FE-Meshfree method for solid mechanics problems

Chen

Qian

et al. 2018

Acta Mech

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Free and forced vibration analyses using the four-node quadrilateral element with continuous nodal stress

Cited by 10 publications

References 48 publications

Effects of seawater immersion on a glass fibre reinforced bioepoxy mechanical properties and its application in the ship hull finite-element analysis

Effects of seawater immersion on a glass fibre reinforced bioepoxy mechanical properties and its application in the ship hull finite-element analysis

FE‐Meshfree QUAD4 Element with Modified Radial Point Interpolation Function for Structural Dynamic Analysis

Smoothed FE-Meshfree method for solid mechanics problems

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