Session: 03-15-01: Composites Design for Automated Fiber Placement and Additive Manufacturing

Paper Number: 137866

137866 - Review of Advanced Constitutive Models for Additive Manufactured Self-Healing Composites in Aerospace Applications 

This is presentation of the initial research at the recent project DENNGA - Development of Numerical Methods in Modelling New Generation of Advanced Composite Structures (IP-HRZZ-2022-10-8845) with the aim to further advance existing numerical methodology on simulating behaviour of additively manufactured self-healing composites.

Experience with self-healing composite structures was gained throughout the previous research of these co-authors within the project ACCESS (IP-HRZZ-2018-01-2248). This project resulted in development of constitutive models for the self-healing matrix material and for the self-healing FRP composite materials validated both with in-house conducted experiments and experimental results available in the literature. Recently, this research group has developed an advanced multiscale constitutive model for intrinsically self-healing polymer composites with matrix plasticity model, rate-dependant matrix micro-damage model and time-dependant healing model.

In this research, relatively new class of polymers, vitrimers, are of special interest since they exhibit intrinsic self-healing ability. To obtain fully reprocessable composite, vitrimers could be combined with basalt fibres whose mechanical properties are comparable to carbon fibres.

Several technologies are available for additive manufacturing of FRP composites, such as: FDM (Fused Deposition Modelling), SLS (Selective Laser Sintering) and DIW (Direct Ink Writing). FDM is the most commonly used one, where mostly thermoplastic polymers are used in material systems. Based on the available reference, the models to evaluate effect of manufacturing parameters on the mechanical properties of 3D printed FRP composites are reviewed. Of the particular interest are limited number of references dealing with additive manufacturing of intrinsically self-healing polymers and FRP composites. Therefore, the extensive evaluation of the current applicable constitutive models is performed. This will include, among others, micromechanical approach based on the RVE as to determine composites mechanical properties; elasto-plastic models for evaluation of failure modes; phenomenological models etc.  

The presented review results are fundamental in selection of the most appropriate constitutive model as a basis for further development of a comprehensive constitutive model for additively manufactured self-healing composites and other new composite material systems.

Presenting Author: Ivica Smojver University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture

Presenting Author Biography: Prof. Ivica Smojver is active at the Department of Aeronautical Engineering, Faculty of Mechanical Engineering and Naval Architecture (FMENA), University of Zagreb. Prior to joining FMENA in 1991, Prof. Smojver had worked at Technical Military Academy in Zagreb, Rocket Technology Department.
In the period 2004 – 2018 he was Head of Chair of Aerodynamics and Chair of Aircraft Structures. He has been Head of the Project Laboratory for Numerical Modelling of Damage in Aeronautical Structures at FMENA since 2009. Scientific interests include the application of finite elements in the analysis of composite aircraft structures; impact damage /failure analysis of aircraft structures; the application of multiscale methods in damage analysis of composite aeronautical structures; computational modeling of various processes; self healing structures. Professor Smojver teaches subjects in the fields of aircraft structures and mechanics of aeronautical composite structures at studies of Mechanical and Aeronautical Engineering at FMENA, as well subjects in the field of rocket technology at the University Military Studies. As the leader of number of projects, he has more than 50 journal and conference papers and has given invited lectures at, among other institutions, NASA Glenn Laboratory, Airbus, Bombardier, TsAGI, INCAS etc.
He is a Senior Member of AIAA and a member of Croatian Society of Mechanics as well as Central European Association of Computational Mechanics, was a Croatian member of Horizon 2020 Programme Committee Transport configuration, a previous Co-chairman of Advisory Council for Aeronautical Research and Innovation in Europe - Member States Group (ACARE – MSG) and was a Croatian member of Clean Sky 2 States Representatives Group. Member of the Materials Technical Committee of the American Institute of Aeronautics and Astronautics since 2022.