Fatigue damage modeling in laminated composite by using Rx-FEM and strength tracking method

Lu, Wei-Tsen; Gao, Zhenjia; Adluru, Hari K.; Hoos, Kevin H.; Seneviratne, Waruna; Mollenhauer, David; Iarve, Endel V.

doi:10.1016/j.compositesa.2022.107199

Cited by 11 publications

(1 citation statement)

References 42 publications

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“…The experimentally obtained fatigue sensitivity curves are necessary to build and verify residual mechanical properties prediction models. Some of them were proposed previously [47][48][49][50][51]. However, these models are often only suitable for a particular class of composite and require the definition of many parameters.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties Degradation of Fiberglass Tubes during Biaxial Proportional Cyclic Loading

et al. 2023

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Composite structures during an operation are subjected to various types of external loading (impact, vibration, cyclic, etc.), which may lead to a decrease in mechanical properties. Previously, many experimental investigations of the mechanical behavior of composites under uniaxial cyclic loading were carried out. Acquisition of new data on the reduction of composite materials’ mechanical characteristics under conditions of multiaxial cyclic loading, as well as verification of existing models for calculation of the residual properties, are relevant. Therefore, this work is devoted to the experimental investigation of the mechanical behavior of fiberglass tubes under proportional cyclic loading. Static and fatigue tests were carried out under tension with torsion conditions. Inhomogeneous strain fields were obtained using a non-contact optical video system VIC-3D. The structural damage accumulation processes were analyzed by an AMSY-6 acoustic emission signals recording system. Surface defects were determined using a DinoLite microscope. Residual dynamic elastic modules were calculated during fatigue tests, and fatigue sensitivity curves were built. Data was approximated using various models, and their high descriptive capability was revealed. Damage accumulation stages were determined. The dependence of the models’ parameters on a stress state were observed. It was concluded that multiaxial cyclic loading leads to a significant decrease in mechanical properties, which should be taken into account in composite structure design.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties Degradation of Fiberglass Tubes during Biaxial Proportional Cyclic Loading

et al. 2023

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Regularized X‐FEM Modeling of Arbitrary 3D Interacting Crack Networks

Iarve,

Zhou,

Ballard

et al. 2024

Numerical Meth Engineering

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An extension to the Regularized eXtended Finite Element Method (RX‐FEM) is proposed that allows arbitrary 3D cracks through a novel hierarchical enrichment algorithm. The technique avoids geometric consideration of how a crack cuts elements or intersects other cracks. Each crack is described separately in terms of its sign distance function and regularized step function, which are only recorded for nodes in the region where the gradient of the regularized step function is non‐zero. The algorithm creates a set of superimposed nodes, referred to as node twins, and elements, referred to as twinned elements, for each crack and determines the connectivity of the element twins using the involved crack indices. The displacement jump is calculated between each pair of element twins corresponding to the same crack, and a cohesive zone model (CZM) is formulated for each pair of twins to model crack opening. Following the theory for the novel method, several examples are presented that illustrate capabilities of the new method that the traditional RX‐FEM formulation lacked. A quasi‐2D example of offset crack propagation is considered and successfully compared with published results. Additionally, two 3D examples involving perpendicularly intersecting cracks are considered, illustrating the intersection of two crack fronts and correct partitioning of the domain into eight fragments due to three crossing cracks, respectively.

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Regularized eXtended Finite Element Modeling of fatigue response in laminated composites

Lu,

Iarve

2024

Modeling Damage, Fatigue and Failure of Composite Materials

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Fatigue damage modeling in laminated composite by using Rx-FEM and strength tracking method

Cited by 11 publications

References 42 publications

Mechanical Properties Degradation of Fiberglass Tubes during Biaxial Proportional Cyclic Loading

Mechanical Properties Degradation of Fiberglass Tubes during Biaxial Proportional Cyclic Loading

Regularized X‐FEM Modeling of Arbitrary 3D Interacting Crack Networks

Regularized eXtended Finite Element Modeling of fatigue response in laminated composites

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