Stable node-based smoothed extended finite element method for fracture analysis of structures

Zhao, Jinhai; Feng, Shizhe; Tao, Yourui; Li, Zhixiong

doi:10.1016/j.compstruc.2020.106357

Cited by 15 publications

(3 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using Rupp's equivalent structural stress as an example, the structural stress value can be directly calculated by combining the diameter of the welding core and plate thickness, after obtaining various loads on the welding core. This method is suitable for various types of specimens [22]. During the process of fatigue analysis, different fatigue events can be obtained by combining the load spectrum under various working conditions [21], allowing for the simulation of the effect of fatigue analysis on the welding points of the quick-replacement battery box.…”

Section: Welding Fatigue Analysis Resultsmentioning

confidence: 99%

A Welding Fatigue Analysis of a Quick-Replacement Battery Box for Electric Vehicles

Li,

Zhou,

Chen

2023

WEVJ

View full text Add to dashboard Cite

In order to counter the problems of cracks and large area fractures in the welding points of quick-replacement battery boxes for electric vehicles (which may lead to the concentration of stress), in this study, a fatigue analysis of the welding points, based on a load spectrum, was used to predict welding points’ fatigue and improve the structural life of quick-replacement battery boxes. Firstly, a model of the quick-replacement battery box was established in SolidWorks software; secondly, the welding points’ fatigue was analyzed using the Optistruct module of HyperMesh software, and the topology of the quick-replacement battery box was optimized according to the results of the analysis; finally, for testing purposes and to achieve a lighter weight and an improved structural life, the fatigue of the welding points of the optimized battery box was analyzed. The results of the analysis showed that the force of the quick-replacement battery box was primarily concentrated at the connection between the middle bottom plate and the partition. Additionally, retaining the number of welding points at the hanging ear was shown to be beneficial for maintaining stiffness during electric vehicle operation; however, the number of welding points at the partition connection could be appropriately reduced. Before optimization, the maximum fatigue damage values of the welding points were 2.763 × 10−6, 3.833 × 10−6, and 6.728 × 10−6, respectively, satisfying the criteria of fatigue damage to the welding points. After optimization, the fatigue damage values of the welding points in the quick-replacement battery box were significantly reduced to 4.431 × 10−8, 4.562 × 10−8, and 8.885 × 10−8, respectively, compared with their pre-optimized levels. Consequently, the stress concentration was alleviated effectively, thereby meeting the conditions for fatigue damage. These results have important theoretical and engineering significance for the design and optimization of quick-replacement battery boxes for electric vehicles.

show abstract

Section: Welding Fatigue Analysis Resultsmentioning

confidence: 99%

A Welding Fatigue Analysis of a Quick-Replacement Battery Box for Electric Vehicles

Li,

Zhou,

Chen

2023

WEVJ

View full text Add to dashboard Cite

show abstract

“…To remedy this issue, Duan et al (2012aDuan et al ( , b, 2014 developed a set of quadratically consistent integration (QCI) schemes for EFGM using quadratic base functions by correcting the nodal derivatives based on the consistency integration constrain between a nodal shape function and its derivatives. By combining the strain smoothing technique with the FEM and the XFEM, a series of numerical methods have been proposed for engineering analysis, such as smoothed finite element method (S-FEM) (Liu et al, 2007), edge-based smoothed finite element method (ES-FEM) (Nguyen-Xuan et al, 2012), node-based smoothed finite element method (NS-FEM) (Li and Liu, 2019) and smoothed extended finite element methods (Sm-XFEM) (Bordas et al, 2010;Surendran et al, 2017Surendran et al, , 2019Zhao et al, 2020), to name a few. Chen et al (2013) proposed the variationally consistent integration (VCI) by correcting test functions to the desire order.…”

Section: Introductionmentioning

confidence: 99%

A linear smoothed meshfree method with intrinsic enrichment functions for 2D crack analysis

Ban

Zhang

et al. 2022

View full text Add to dashboard Cite

PurposeThis article aims to develop an accurate and efficient meshfree Galerkin method based on the strain smoothing technique for linear elastic continuous and fracture problems.Design/methodology/approachThis paper proposed a generalized linear smoothed meshfree method (LSMM), in which the compatible strain is reconstructed by the linear smoothed strains. Based on the idea of the weighted residual method and employing three linearly independent weight functions, the linear smoothed strains can be created easily in a smoothing domain. Using various types of basic functions, LSMM can solve the linear elastic continuous and fracture problems in a unified way.FindingsOn the one hand, the LSMM inherits the properties of high efficiency and stability from the stabilized conforming nodal integration (SCNI). On the other hand, the LSMM is more accurate than the SCNI, because it can produce continuous strains instead of the piece-wise strains obtained by SCNI. Those excellent performances ensure that the LSMM has the capability to precisely track the crack propagation problems. Several numerical examples are investigated to verify the accurate, convergence rate and robustness of the present LSMM.Originality/valueThis study provides an accurate and efficient meshfree method for simulating crack growth.

show abstract

“…A first-order XFEM proposed by Sanchez et al [19] could achieve the optimal convergence rate by adopting singular enrichments. Zhao et al [20] proposed stable node-based smoothed XFEM to model the discontinuity using enrichment functions and stabilization term. The extended functional basis with discontinuous properties is taken to represent the discontinuities in a computational domain by Jiang et al [21].…”

Section: Introductionmentioning

confidence: 99%

Evaluation Method for Cohesive Crack Propagation in Fragile Locations of RCC Dam Using XFEM

Zhao

2020

Water

View full text Add to dashboard Cite

Roller compacted concrete (RCC) dams own a large number of horizontal construction layers, which can easily lead to weak joints among layers and generate interlayer joints with different scales to reduce the dam bearing capacity. In this study, extended finite element method (XFEM) is used to simulate crack propagation, the finite element description is first taken on the strong discontinuity. Subsequently, the displacement function of the crack-tip in the quadrilateral element and the geometric determination method of the crack-tip strengthening region are established. Afterwards, the discrete form of the governing equation is derived and the XFEM increment discretization method of the cohesive crack with the crack-tip reinforcement is proposed using the virtual node method to represent the discontinuity of the fracture element. These methods are validated through simulating mixed-mode cracking of one-sided notched asymmetric four-point bending beam. Eventually, the proposed methods are applied to RCC gravity dam to study the development rule and propagation path of the interlayer joints, so as to evaluate the effect of different lengths of the interlayer joints on the dam structural performance. The estimated critical values of dam deformation are helpful to prevent the dam failure during long term operation.

show abstract

Stable node-based smoothed extended finite element method for fracture analysis of structures

Cited by 15 publications

References 64 publications

A Welding Fatigue Analysis of a Quick-Replacement Battery Box for Electric Vehicles

A Welding Fatigue Analysis of a Quick-Replacement Battery Box for Electric Vehicles

A linear smoothed meshfree method with intrinsic enrichment functions for 2D crack analysis

Evaluation Method for Cohesive Crack Propagation in Fragile Locations of RCC Dam Using XFEM

Contact Info

Product

Resources

About