Dynamic behaviour of square tubular T-joints under impact loadings

Cui, Pengfei; Liu, Yanzhi; Chen, Fan; Huo, Jingsi

doi:10.1016/j.jcsr.2017.12.028

Cited by 19 publications

(5 citation statements)

References 21 publications

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“…According to the test plan, the accuracies of the FE models were verified using static loading [22] and impact tests [23]. The detailed geometries of the specimens are summarized in Table 1, where b, h, t, and L are the width, height, thickness, and length, respectively; R and r denote the outer and inner corner radii, respectively; and the subscripts "0" and "1" indicate the chord and brace components, respectively.…”

Section: Model Information and Materials Propertiesmentioning

confidence: 99%

“…The three static loading specimens (T1-0, T2-0, and T3-0) were used to obtain the static bearing capacities of the specimens and to determine the value of the pre-axial pressure of the brace. The boundary conditions, mesh size, material properties and contact settings between the drop hammer and the joint were kept consistent with the impact specimens [23] in Section 2.…”

Section: Determination Of Specimen Sizementioning

confidence: 99%

“…In this study, commercial ABAQUS software was used to perform independent numerical modeling of the static loading [22] and impact tests [23] of SHS T-joints, and the numerical results were compared with experimental curves to verify the feasibility of the finite element (FE) model. Then, 138 FE models of SHS T-joints were developed, including three static specimens and 135 specimens with impact loads acting on the surface of the chord.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Dynamic Mechanism of Square Tubular T-Joints With Chord Flanges Subjected to Impact Loading

2024

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This study examines the dynamic mechanical properties of square tubular T-joints with impact loads acting on the chord surface in the joint area. The study first verified the failure modes and behaviors of the specimens under a brace axial force and impact, respectively, where the simulation results demonstrated good agreement with the experimental results. A total of 138 square hollow section tubular T-joint finite element models were divided into T1, T2, and T3 groups based on different tube diameter ratios. The failure modes, displacement-time history curves, and impact force-time history curves were obtained. The results revealed that the joint deformation modes were primarily characterized by significant local indentation at the impact site and junction of the chord and brace, as well as a certain degree of deformation at both ends of the chord. Within a certain range, the preloaded axial force could mitigate the development of plastic deformation, whereas an increased ratio of the drop hammer length to chord diameter exacerbated it. Finally, theoretical analysis was simplified by defining the plastic element set, and the energy dissipation coefficient ψ was proposed to evaluate the impact resistance of square tubular T-joints by analyzing the specific energy changes in the intersecting region (El) and at the ends of the chord (Ee).

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Section: Model Information and Materials Propertiesmentioning

confidence: 99%

Section: Determination Of Specimen Sizementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of the Dynamic Mechanism of Square Tubular T-Joints With Chord Flanges Subjected to Impact Loading

2024

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“…For this purpose, researchers have gone from experimental tests in combination with numerical estimations to develop finite element models with some constitutive equations to reproduce the nonlinear visco‐plastic behavior of materials under dynamic loading 33 . Those models, such as Johnson–Cook or Cowper–Symonds, require to identify material parameters, which allows capturing their dynamic mechanical response 34–36 . Because Cowper–Symonds constitutive law is visco‐plastic, it offers the capability to capture the combined effects of strain rate and plastic deformation of the material response under impact testing 34–36 .…”

Section: Introductionmentioning

confidence: 99%

“…Those models, such as Johnson–Cook or Cowper–Symonds, require to identify material parameters, which allows capturing their dynamic mechanical response 34–36 . Because Cowper–Symonds constitutive law is visco‐plastic, it offers the capability to capture the combined effects of strain rate and plastic deformation of the material response under impact testing 34–36 . The parameters values used in constitutive models are usually obtained by uniaxial tension or compression tests at different strain rates or by using inverse methods 33,37 .…”

Section: Introductionmentioning

confidence: 99%

Impact test behavior of aluminum alloys welded joints: Experimental and numerical analysis

Martínez

Ambriz

Naït-Abdelaziz

et al. 2021

Fatigue Fract Eng Mat Struct

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The Charpy impact test behavior of base metal, weld metal, and heat‐affected zone for 6061‐T6 and 7075‐T651 aluminum alloy welds was analyzed. Force versus time curves of welded joints were obtained by means of an instrumented Charpy pendulum. An explicit finite element model was implemented to evaluate the performance of the Cowper–Symonds constitutive model. Parameters were obtained through a strain‐rate‐sensitivity analysis of base metals at high strain rates. Experimental results were compared with those computed by finite element method (FEM) by assuming the same physical and geometrical conditions of the dynamic‐experimental tests. ANSYS‐LS DYNA was used to achieve the FEM simulations. The comparison between experimental and FEM results in terms of force versus time data was evaluated. Higher accuracies were observed in Al 7075‐T651 alloy (roughly 98%). The 6061‐T6 alloy has shown an approximation of about 90%. Discrepancies are explained in terms of the effective plastic strain at fracture.

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Dynamic behavior of CHS-SHS tubular T-joints subjected to low-velocity impact loading

Gao

Xiao

Guan

et al. 2019

Engineering Structures

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Dynamic behaviour of square tubular T-joints under impact loadings

Cited by 19 publications

References 21 publications

Analysis of the Dynamic Mechanism of Square Tubular T-Joints With Chord Flanges Subjected to Impact Loading

Analysis of the Dynamic Mechanism of Square Tubular T-Joints With Chord Flanges Subjected to Impact Loading

Impact test behavior of aluminum alloys welded joints: Experimental and numerical analysis

Dynamic behavior of CHS-SHS tubular T-joints subjected to low-velocity impact loading

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