A5059347120- Mechanical Behavior of Composites
- Epoxy Resin Curing Processes
- Structural Response to Dynamic Loads
- Structural Analysis of Composite Materials
- Cellular and Composite Structures
- Material Properties and Applications
- Green IT and Sustainability
- Innovation Diffusion and Forecasting
- Composite Material Mechanics
- Metal Forming Simulation Techniques
- Numerical methods in engineering
- Material Properties and Processing
- Synthesis and properties of polymers
- Aluminum Alloy Microstructure Properties
- Injection Molding Process and Properties
- Metallurgy and Material Forming
- Digital Platforms and Economics
RWTH Aachen University
2020-2023
FIR e. V. an der RWTH Aachen
2022
Technische Universität Dresden
2021
FHNW University of Applied Sciences and Arts
2007-2014
A fast crosslinking reaction is crucial for the economical production of automotive components in liquid composite molding (LCM) processes. Although a large number works have focused on modeling shrinkage induced surface waviness and part distortions underlying phenomena an accurate determination material properties under consideration processing parameters still represents major challenge fast-curing epoxy resins. Fast-curing polymers allow manufacturing thermoset parts minutes while...
Process-induced surface waviness effects represent a major concern for series production of high-quality lightweight structures based on fiber reinforced plastics (FRP). This paper suggests method the numerical prediction these by using example processing glass (GFRP) in resin transfer molding (RTM) process. The influence reaction kinetics, chemical shrinkage and cure-dependent viscoelastic properties are taken into account. Furthermore, dependence quality curing cycle, consolidation...
Abstract For fiber‐reinforced plastics, the strain‐rate dependent response is governed by matrix behavior. In this work, Goldberg model considered for epoxy constitutive material model. Moreover, dependency achieved direct influence on elastic modulus, inelastic strain, and strain to failure. addition, an anisotropic damage implemented extended through a definition. Since relies nonphysical parameters, parameter study further performed. Additional numerical investigations using...
Fast-curing epoxy resins enable substantial reduction of cycle times during production thermoset polymer matrix composites. Due to the snap-cure behaviour, both characterisation and processing these are associated with high complexity which motivates development a high-fidelity framework for prediction process-dependent behaviour ranging from experiment model validation. In order determine influence time, temperature, degree cure, multitude rheometer dynamic mechanical analysis experiments...
Commonly used visualisation methods for observing material flow during extrusion are either labor intensive, prone to loss of the tracer pattern or subject different behaviour than occurs in practice. A novel method using a copper mesh inlay and computer tomography was developed visualise partially extruded EN AW-6082 aluminum billets. In parallel with physical experiments, finite element (FE) model compared experiments. The readily observable from images FE data closely matched experimental results.
Liquid composite molding (LCM) has established as a high quality manufacturing process for fiber reinforced structures. In order to reduce cycle times significantly, novel fast curing matrix resins are being introduced into series production. These put requirements on control and part reproducibility. Problems that may be encountered in this context involve process-induced distortion surface waviness resulting from anisotropic cure-dependent material properties. Numerical simulations...