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composites

  • Design and simulation of additive manufactured structures of three component composite material

    Lattice structures have become widespread in many areas. Their obvious advantage is the light weight and significant cost savings of a material. Application of unidirectional composite materials allows preserve the exceptional strength properties of composites in construction regardless of the loading direction. For this reason, the lattice composite structures are actively used in the aerospace industry. The goal of this work is the study of the property change of lattice structures of three component composite materials depending on their parameters, as well as the determination of optimal configurations of these structures.​ 

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  • Damage characterization of aluminum 2024 thin sheet for different stress triaxialities

    Due to its attractive mechanical properties, aluminum 2024 is widely used in aircraft manufacturing industries, especially as fiber metal laminates, such as GLARE. In the present work, a series of experiments for different stress triaxialities are used to study the ductile damage of Al 2024 considering continuum damage mechanics (CDM).​

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  • Process Integration and Optimization of ICME Carbon Fiber Composites for vehicle lightweighting: a preliminary development

    Different from the Sheet Molding Compounds (SMC) structure, the unidirectional (UD) structure (laminate) has multiple layers, and each layer has anisotropic properties. The layout of each component in the vehicle structure needs to be optimized in order to achieve the optimum structure performance such as stiffness, durability, NVH, and safety. he multi-layer UD structure optimization is implemented on the platform of modeFRONTIER.

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  • Strengthening of Composite T-joints using novel ply design approaches

    This study assesses three different and novel design approaches to increase the failure stress and elastic damage limit of T-shaped structural joints made of carbon fibre-epoxy composite. The ply orientations to the laminate within the T-joint radius bend, which is highly susceptible to delamination failure, were designed using a numerical optimisation method and two design-of-experiment methods to increase the failure load. Software modeFRONTIER was used for optimization.

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  • Scaling Parameter for Fatigue Delamination Growth in Composites under Varying Load Ratios

    The aim of this paper in aerospace applications, is to develop a scaling parameter that can account for the effects of fiber bridging on the growth behavior of delamination cracks under fatigue loading. An inverse method has been developed to determine the traction stresses acting in the crack wake. Static and fatigue experiments were carried out on IM7/977-3 composite laminates.

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  • Implementation and calibration of meso-scale modeling technique for simulation of tensile behavior of fabric materials

    In this paper, the proposed calibration methodology constitutes a unique solution for the correct determination of material properties of yarns, which are necessary for the simulation of fabric response.  An algorithm in modeFRONTIER was designed to determine the combination of parameters in order to fit the experimental tensile load-displacement curve with the corresponding numerical curve.

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  • Design of a Meta-Material with Targeted Nonlinear Deformation Response

    This thesis aims to demonstrate the possibility of designing a meta-material to match a nonlinear deformation response. Application of this method was successful in generating a meta-material to meet the response of the rubber pad in an M1 Abrams tank. The optimization method using modeFRONTIER can serve as a framework for future designers to develop meta-materials for nonlinear targeted responses

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  • Multi-objective optimization of the extrusion process

    A comprehensive approach for multi-objective design optimization of extrusion dies is illustrated in this work. A three-bridges porthole die, used to produce thick round tube profiles, was selected as test case. This approach using modeFRONTIER for optimization can provide an effective process for practical productions to be used at the die and process design stage, in order to maximize process performances both for die makers and extruders.

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  • Modeling and Optimizing IPMC Microgrippers

    This project was run with the goal of optimizing IPMC (Ionic Polymer Metal Composite) fingers for deflection and force. An optimization process using the FEA model was chosen. The best way to achieve design goals without simply cutting out an IPMC finger and testing it, was to use an optimization package using modeFRONTIER and Comsol Multiphysics. 

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