Damage Tolerance Prediction for a Hybrid Composite/Metal Structure under Three Point Bending

Arndt, Corey M.; Heng, Bozhi; Ma, Xiafeng; TerMaath, Stephanie C.

doi:10.2514/6.2019-0233

Cited by 3 publications

(7 citation statements)

References 9 publications

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“…The source model for the layered structure is a high-fidelity 3D finite element (FE) model, previously developed by Heng et al and Arndt et al [14][15][16][17]. The structural configuration is an E-glass/epoxy composite overlay co-cured to an aluminum 5456-H116 substrate (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

“…In many cases, data were sparse for a given parameter, and in some cases only a single average value was used to represent a material property. These 41 mechanical properties populated the parameter space evaluated in this study and full details can be found in the previous literature on the source model development [14][15][16][17]. Only material parameters were selected to limit the scope and to focus on investigating the accuracy and efficiency of the RDSM summation approach.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…Structural analysis solutions exist for lap and scarf joints (e.g., [57,58]); however, advanced, high-fidelity analysis, such as FE analysis, is required to capture the effects of the multi-physics, interacting damage mechanisms for generic configurations of layered structures. A validated source model was developed by Heng et al and Arndt et al [14,15] that explicitly models each lamina layer of the composite overlay, the metallic substrate, and the composite/metal interface to predict structural damage tolerance (Figure 4). This high-fidelity 3D FE model for analysis with ABAQUS [59] captures the interacting damage mechanisms including matrix cracking (PL), fiber fracture (DL), delamination within the composite (DC), disbond at the composite/metal interface (DI), and yielding in the metal (PM).…”

Section: Computational Model Development and Validationmentioning

confidence: 99%

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Reduced-Dimension Surrogate Modeling to Characterize the Damage Tolerance of Composite/Metal Structures

Arndt,

Crusenberry,

Heng

et al. 2023

Modelling

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Complex engineering models are typically computationally demanding and defined by a high-dimensional parameter space challenging the comprehensive exploration of parameter effects and design optimization. To overcome this curse of dimensionality and to minimize computational resource requirements, this research demonstrates a user-friendly approach to formulating a reduced-dimension surrogate model that represents a high-dimensional, high-fidelity source model. This approach was developed specifically for a non-expert using commercially available tools. In this approach, the complex physical behavior of the high-fidelity source model is separated into individual, interacting physical behaviors. A separate reduced-dimension surrogate model is created for each behavior and then all are summed to formulate the reduced-dimension surrogate model representing the source model. In addition to a substantial reduction in computational resources and comparable accuracy, this method also provides a characterization of each individual behavior providing additional insight into the source model behavior. The approach encompasses experimental testing, finite element analysis, surrogate modeling, and sensitivity analysis and is demonstrated by formulating a reduced-dimension surrogate model for the damage tolerance of an aluminum plate reinforced with a co-cured bonded E-glass/epoxy composite laminate under four-point bending. It is concluded that this problem is difficult to characterize and breaking the problem into interacting mechanisms leads to improved information on influential parameters and efficient reduced-dimension surrogate modeling. The disbond damage at the interface between the resin and metal proved the most difficult mechanism for reduced-dimension surrogate modeling as it is only engaged in a small subspace of the full parameter space. A binary function was successful in engaging this damage mechanism when applicable based on the values of the most influential parameters.

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Section: Methodsmentioning

confidence: 99%

Section: Materials Propertiesmentioning

confidence: 99%

Section: Computational Model Development and Validationmentioning

confidence: 99%

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Reduced-Dimension Surrogate Modeling to Characterize the Damage Tolerance of Composite/Metal Structures

Arndt,

Crusenberry,

Heng

et al. 2023

Modelling

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“…This method was demonstrated on the particular hybrid configuration of an E-glass/epoxy composite patch co-cured to an aluminum 5456 substrate. This work utilizes the high-fidelity 3D finite element (FE) model previously developed by Heng et al and Arndt et al [42,43], which explicitly models each layer of the composite overlay, the metallic substrate, and the interface to predict interacting damage mechanisms including matrix cracking, fiber breakage, delamination within the composite, disbond at the composite/metal interface, and yielding in the metal. The model was evaluated under four-point bending using global sensitivity analysis (GSA), uncertainty quantification (UQ), and data visualization to identify the most influential design parameters, quantify their uncertainty on patch reliability, and guide potential design requirements.…”

Section: Methodsmentioning

confidence: 99%

Nondeterministic Parameter Space Characterization of the Damage Tolerance of a Composite/Metal Structure

Arndt

TerMaath

2022

AIAA SCITECH 2022 Forum

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An integrated experimental, computational, and non-deterministic approach is demonstrated to predict the damage tolerance of an aluminum plate reinforced with a cocured bonded quasi-isotropic E-glass/epoxy composite overlay and to determine the most sensitive material parameters and their ranges of influence on the damage tolerance of the hybrid system. To simulate the complex progressive damage in the repaired structure, a high fidelity three-dimensional finite element model is developed and validated using four-point bend testing to investigate potential damage mechanisms. A surrogate model is then generated to explore the complex parameter space of this model. Global sensitivity analysis and uncertainty quantification are performed for non-deterministic analysis to characterize the energy absorption capability of the patched structure relative to these influential design properties. Additionally, correlating the data quality of the material parameters with the sensitivity analysis results provides practical guidelines for model improvement and the design optimization of the patched structure.

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“…A comparative study on the post-buckling behaviour of T-stiffened co-cured composite panels with cobonding and secondary bonding was carried out by Ye et al [14] and it proves that the bonding method influences the buckling behaviour of the composites. Arndt et al [15] in the course of their experimentation fabricated dis-similar composite joints using fibre and aluminium. Furthermore, theyemployed a three-point bending to analyse the damage tolerance.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation on enhancing the strength and stiffness of GFRP co-cured composite joint: effect of glass powder addition

Rajan

Gnanavel²

2022

Mater. Res. Express

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Co-cure adhesive joints are being preferably used by various industries, namely automobile, marine and aerospace, to joint two surfaces in structural applications as a useful replacement for mechanical fastenings. The present work focuses on mechanical properties and free vibration behaviour of co-cured glass fiber composites which is being reinforced with glass powder. In the course of the experimentation, the adhesive is being reinforced concurrently with glass powder belonging to four different weight percentages such as 0%, 0.5%, 1%, 1.5% and 2%. The mechanical testing results reveal that the addition of 1.5% of glass powder to the epoxy could relatively help in increasing the tensile strength and flexural strength of co-cured glass fiber composites respectively to the degree of 11.68% (364.29 Mpa) and 24.75% (256.16 Mpa). Single lap shear results shows that the 0.5% glass powder reinforcement significantly increases the shear strength of cocured glass fiber composites by 20.91% (19.31 Mpa). Furthermore, the free vibrational study of 1.5 % co-cured composites show that they have a higher fundamental natural frequency than the glass powder reinforced co-cured composites that have a lower weight percentage. Furthermore, the addition of glass powder to co-cured composites helps in increasing the damping factor of the composites due to the glass powder agglomeration. Neat and glass powder reinforced co-cured samples are father being analysed afterwards using the mechanical and shear test by scanning electron microscopy.

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Damage Tolerance Prediction for a Hybrid Composite/Metal Structure under Three Point Bending

Cited by 3 publications

References 9 publications

Reduced-Dimension Surrogate Modeling to Characterize the Damage Tolerance of Composite/Metal Structures

Reduced-Dimension Surrogate Modeling to Characterize the Damage Tolerance of Composite/Metal Structures

Nondeterministic Parameter Space Characterization of the Damage Tolerance of a Composite/Metal Structure

An experimental investigation on enhancing the strength and stiffness of GFRP co-cured composite joint: effect of glass powder addition

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