Functional intrinsic hybrid composites with active elements and structured metal surfacesContinuation: Efficient heat and load transport for fast rate activation - dynamic characterization and multi scale modelling

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In the previous project (DFG404403710 Funktionale intrinsische Hybridverbunde), selective electrochemical etching for surface modification of nickel-titanium shape memory alloys (SMA) and the increase of the elastic strain of the matrix was proven useful for increased load transfer and a complete set of methods for quantitative experimental characterization of the thermoelastic properties of SMA wires and hybrid composite (HC) was established. The proposed follow-up project will pursue three mutually interacting main objectives: 1) The development of a fundamentally new concept to improve the thermo-mechanical resistance of the SMA-polymer interface in an active HC through a precise adjustment of the thermo-mechanical properties of the polymeric matrix by introducing nanoscale-sculptured functional Al foils in the interface region. 2) Physically motivated multiscale modelling, for a fundamental understanding of the thermo-mechanical behavior of the SMA-polymer interface under cyclic thermo-mechanical loading. 3) Fundamental investigation of the possibilities and limitations of additive manufacturing techniques, namely Stereolithography for the fabrication of HC modules with tailored properties. The project is divided in three interacting work packages, (I) Surface modification, development of functional Al-foils for load transfer and characterization of bulk-surface interactions on the micro-scale (Lead: CAU), (II) HC design and additive manufacturing of HC modules (Lead: IVW) and (III) Characterization and multiscale modelling (Lead: IVW). The research methodology focuses on the experimental characterization, modelling and understanding of the process-structure-property relation (PSPR) by: Establishing a quantitative representation of the PSPR based on physically motivated models and experiments on dedicated specimen along the length scale of the HC. Validating this process-structure-property relation with experiments on full HCs. Using the knowledge for an iterative knowledge-based development of the overall HC design depending on the requirements from different applications.