XFEM Modeling of Interface Failure in Adhesively Bonded Fiber‐Reinforced Polymers

Multi-material lightweight designs, e.g. the combination of aluminum with fiber-reinforced composites, are a key feature for the development of innovative and resource-efficient products. The connection properties of such bimaterial interfaces are influenced by the geometric structure on different length scales. In this article a modeling strategy is presented to study the failure behavior of rough interfaces within a computational homogenization scheme. We study different local phenomena and their effects on the overall interface characteristics, e.g. the surface roughness and different local failure types as cohesive failure of the bulk material and adhesive failure of the local interface. Since there is a large separation in the length scales of the surface roughness, which is in the micrometer range, and conventional structural components, we employ a numerical homogenization approach to extract effective tractionseparation laws to derive effective interface parameters. Adhesive interface failure is modeled by cohesive elements based on a traction-separation law and cohesive failure of the bulk material is described by an elastic-plastic model with progressive damage evolution.

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“…First applications to interfaces or layers of indefinite thickness can be found in e.g. [11] and [18].…”

Section: Homogenizationmentioning

confidence: 99%

“…Numerical models to describe and predict the failure behavior of bi-material interfaces have been proposed in e.g. [3,9,10,11]. Yao and Qu [3] developed a fracture mechanics model to predict the amount of adhesive and cohesive failure in rough polymer-metal interfaces.…”

Section: Introductionmentioning

confidence: 99%

Microscale simulation of adhesive and cohesive failure in rough interfaces

Hirsch

Kästner

2017

Engineering Fracture Mechanics

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“…As the prediction of the effect of microscopic damage on the overall mechanical response is a topic of ongoing research, e.g. the influence of interface failure on the macroscopic stress-strain repsonse has been analysed in Kästner et al (2015), the parameterisations of the damage model, Section 3.2, and the cohesive zone model in Section 3.3 are still based on experiments.…”

Section: Parameter Identificationmentioning

confidence: 99%

Simulation of self-piercing rivetting processes in fibre reinforced polymers: Material modelling and parameter identification

Hirsch

Müller

Machens

et al. 2017

Journal of Materials Processing Technology

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This paper addresses the numerical simulation of self-piercing rivetting processes to join fibre reinforced polymers and sheet metals. Special emphasis is placed on the modelling of the deformation and failure behaviour of the composite material. Different from the simulation of rivetting processes in metals, which requires the modelling of large plastic deformations, the mechanical response of composites is typically governed by intra-and interlaminar damage phenomena. Depending on the polymeric matrix, viscoelastic effects can interfere particularly with the long-term behaviour of the joint. We propose a systematic approach to the modelling of composite laminates, discuss limitations of the used model, and present details of parameter identification.Homogenisation techniques are applied to predict the mechanical behaviour of the composite in terms of effective anisotropic elastic and viscoelastic material properties. In combination with a continuum damage approach this model represents the deformation and failure behaviour of individual laminae. Cohesive zone elements enable the modelling of delamination processes. The parameters of the latter models are identified from experiments. The defined material model for the composite is eventually utilised in the simulation of an exemplary self-piercing rivetting process.

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“…This is made feasible by the use of a complex HYTT preform made partly of near net‐shaped 3D fabrics whose fibers are adapted to the respective loading paths (e.g., those to which the wheelhouses are subjected) . Furthermore, the integration of near net‐shaped shell stringer fabrics ensures the fulfilment of structural criteria while also minimizing weight as described in Mountasir et al Extensive research into the dimensioning of HYTT structures was therefore carried out, thus facilitating the use of novel damage models for HYTT composites to describe complex, non‐linear structural behavior under static and dynamic loading . Those models also made it possible to validate the structural resistance of components such as the bodywork and the adaptive leaf spring.…”

Section: Highly Integrated Structures With Load‐adapted Design Solutionsmentioning

confidence: 99%

Novel Hybrid Yarn Textile Thermoplastic Composites for Function‐Integrating Multi‐Material Lightweight Design

et al. 2016

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Future mobility applications are characterized by a high level of resource efficiency due to the application of novel lightweight materials and function-integrating, multi-material design concepts. Textile thermoplastic composites in particular pave the way for lightweight components characterized by highly specific mechanical properties and efficient production processes. This essay presents the strategy pursued by the Collaborative Research Centre SFB 639 "Textile-reinforced composite components for function-integrating multi-material design in complex lightweight applications", a concept for the holistic analysis of complex process chains for hybrid yarn textile thermoplastic (HYTT) composites and the idea behind the innovative FiF electric mobility technology demonstrator vehicle.

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XFEM Modeling of Interface Failure in Adhesively Bonded Fiber‐Reinforced Polymers

Cited by 15 publications

References 32 publications

Microscale simulation of adhesive and cohesive failure in rough interfaces

Microscale simulation of adhesive and cohesive failure in rough interfaces

Simulation of self-piercing rivetting processes in fibre reinforced polymers: Material modelling and parameter identification

Novel Hybrid Yarn Textile Thermoplastic Composites for Function‐Integrating Multi‐Material Lightweight Design

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