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Article
A hybrid computational scheme on electromechanically coupled behaviors of aligned MWCNT/polymer nanocomposite sensors with strain-dependent tunneling effect
The sensitivity of randomly distributed multi-walled carbon nanotube (MWCNT)/polymer nanocomposite sensors has been extensively investigated, while that of aligned nanocomposite sensors is to be explored. In t...
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Article
Open AccessEffective hyperelastic material parameters from microstructures constructed using the planar Boolean model
We construct two-dimensional, two-phase random heterogeneous microstructures by stochastic simulation using the planar Boolean model, which is a random collection of overlap** grains. The structures obtained...
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Article
Open AccessNumerische Prozessauslegung zur gezielten Eigenspannungseinstellung in warmmassivumgeformten Bauteilen unter Berücksichtigung von Makro- und Mikroskala
Ziel dieser Arbeit ist die Einstellung eines vorteilhaften Druckeigenspannungsprofils in warmumgeformten Bauteilen durch intelligente Prozessführung mit angepasster Abkühlung aus der Schmiedewärme. Die Machbar...
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Article
Open AccessResidual stresses in hot bulk formed parts: microscopic stress analysis for austenite-to-martensite phase transformation
In this contribution, the two-scale analysis of residual stress states in a hot bulk formed part with subsequent cooling in the framework of the ...
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Article
Open AccessResidual stresses in hot bulk formed parts: two-scale approach for austenite-to-martensite phase transformation
In production engineering, current research focuses on the induction of targeted residual stress states in components in order to improve their properties. Therein, the combination of experiment and simulation...
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Chapter and Conference Paper
Experimental and Numerical Investigations on the Development and Stability of Residual Stresses Arising from Hot Forming Processes
Residual stresses are an important issue as they affect both the manufacturing process as well as the performance of the final parts. Taking the whole process chain of hot forming into account, the integrated ...
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Chapter and Conference Paper
EXASTEEL: Towards a Virtual Laboratory for the Multiscale Simulation of Dual-Phase Steel Using High-Performance Computing
We present a numerical two-scale simulation approach of the Nakajima test for dual-phase steel using the software package FE2TI, a highly scalable implementation of the well known homogenization method FE2. We co...
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Chapter
Construction of Statistically Similar RVEs
In modern engineering, micro-heterogeneous materials are designed to satisfy the needs and challenges in a wide field of technical applications. The effective mechanical behavior of these materials is influenc...
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Chapter
Construction of Statistically Similar Representative Volume Elements
In computational homogenization approaches the definition of a representative volume element (RVE) strongly influences the performance of the resulting numerical scheme, not only with respect to its physical a...
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Article
Approximation of random microstructures by periodic statistically similar representative volume elements based on lineal-path functions
For the direct incorporation of micromechanical information into macroscopic boundary value problems, the FE2-method provides a suitable numerical framework. Here, an additional microscopic boundary value problem...
