Thermomechanical Modeling And Experimental Characterization Of Sheet Molding Compound Composites

Author : Lang, Juliane
Publisher : KIT Scientific Publishing
Page : 250 pages
File Size : 46,8 Mb
Release : 2023-06-28
Category : Electronic
ISBN : 9783731512325

Get Book

Thermomechanical Modeling and Experimental Characterization of Sheet Molding Compound Composites by Lang, Juliane Pdf

The aim of this work is to model and experimentally characterize the anisotropic material behavior of SMC composites on the macroscale with consideration of the microstructure. Temperature-dependent thermoelastic behavior and failure behavior are modeled and the corresponding material properties are determined experimentally. Additionally, experimental biaxial damage investigations are performed. A parameter identification merges modeling and experiments and validates the models.

Author : Kehrer, Maria Loredana
Publisher : KIT Scientific Publishing
Page : 204 pages
File Size : 48,6 Mb
Release : 2019-06-13
Category : Technology & Engineering
ISBN : 9783731509240

Get Book

Thermomechanical Mean-Field Modeling and Experimental Characterization of Long Fiber-Reinforced Sheet Molding Compound Composites by Kehrer, Maria Loredana Pdf

A discontinuous fiber-reinforced thermoset material produced by the Sheet Molding Compound process is investigated. Due to the process-related fiber orientation distribution, a composite with an anisotropic microstructure is created which crucially affects the mechanical properties. The central objectives are the modeling of the thermoelastic behavior of the composite accounting for the underlying microstructure, and the experimental characterization of the pure resin and the composite material.

Author : Maria Loredana Kehrer
Publisher : Saint Philip Street Press
Page : 0 pages
File Size : 54,7 Mb
Release : 2020-10-09
Category : Technology & Engineering
ISBN : 1013281942

Get Book

Thermomechanical Mean-Field Modeling and Experimental Characterization of Long Fiber-Reinforced Sheet Molding Compound Composites by Maria Loredana Kehrer Pdf

A discontinuous fiber-reinforced thermoset material produced by the Sheet Molding Compound process is investigated. Due to the process-related fiber orientation distribution, a composite with an anisotropic microstructure is created which crucially affects the mechanical properties. The central objectives are the modeling of the thermoelastic behavior of the composite accounting for the underlying microstructure, and the experimental characterization of the pure resin and the composite material. This work was published by Saint Philip Street Press pursuant to a Creative Commons license permitting commercial use. All rights not granted by the work's license are retained by the author or authors.

Author : Bauer, Julian Karl
Publisher : KIT Scientific Publishing
Page : 252 pages
File Size : 45,7 Mb
Release : 2023-02-27
Category : Technology & Engineering
ISBN : 9783731512622

Get Book

Fiber Orientation Tensors and Mean Field Homogenization: Application to Sheet Molding Compound by Bauer, Julian Karl Pdf

Effective mechanical properties of fiber-reinforced composites strongly depend on the microstructure, including the fibers' orientation. Studying this dependency, we identify the variety of fiber orientation tensors up to fourth-order using irreducible tensors and material symmetry. The case of planar fiber orientation tensors, relevant for sheet molding compound, is presented completely. Consequences for the reconstruction of fiber distributions and mean field homogenization are presented.

Author : Gajek, Sebastian
Publisher : KIT Scientific Publishing
Page : 326 pages
File Size : 53,7 Mb
Release : 2023-08-25
Category : Electronic
ISBN : 9783731512783

Get Book

Deep material networks for efficient scale-bridging in thermomechanical simulations of solids by Gajek, Sebastian Pdf

We investigate deep material networks (DMN). We lay the mathematical foundation of DMNs and present a novel DMN formulation, which is characterized by a reduced number of degrees of freedom. We present a efficient solution technique for nonlinear DMNs to accelerate complex two-scale simulations with minimal computational effort. A new interpolation technique is presented enabling the consideration of fluctuating microstructure characteristics in macroscopic simulations.

Author : Kuhn, Jannick
Publisher : KIT Scientific Publishing
Page : 224 pages
File Size : 50,5 Mb
Release : 2023-04-04
Category : Technology & Engineering
ISBN : 9783731512721

Get Book

Microstructure modeling and crystal plasticity parameter identification for predicting the cyclic mechanical behavior of polycrystalline metals by Kuhn, Jannick Pdf

Computational homogenization permits to capture the influence of the microstructure on the cyclic mechanical behavior of polycrystalline metals. In this work we investigate methods to compute Laguerre tessellations as computational cells of polycrystalline microstructures, propose a new method to assign crystallographic orientations to the Laguerre cells and use Bayesian optimization to find suitable parameters for the underlying micromechanical model from macroscopic experiments.

Author : Ernesti, Felix
Publisher : KIT Scientific Publishing
Page : 264 pages
File Size : 46,7 Mb
Release : 2023-04-17
Category : Technology & Engineering
ISBN : 9783731512851

Get Book

A computational multi-scale approach for brittle materials by Ernesti, Felix Pdf

Materials of industrial interest often show a complex microstructure which directly influences their macroscopic material behavior. For simulations on the component scale, multi-scale methods may exploit this microstructural information. This work is devoted to a multi-scale approach for brittle materials. Based on a homogenization result for free discontinuity problems, we present FFT-based methods to compute the effective crack energy of heterogeneous materials with complex microstructures.

Author : Görthofer, Johannes
Publisher : KIT Scientific Publishing
Page : 258 pages
File Size : 51,9 Mb
Release : 2022-09-13
Category : Technology & Engineering
ISBN : 9783731512059

Get Book

Microstructure generation and micromechanical modeling of sheet molding compound composites by Görthofer, Johannes Pdf

Wir präsentieren einen Algorithmus zur schnellen Erzeugung von SMC Mikrostrukturen hoher Güte, durch Verwendung einer exakten Schließung und eines quasi-zufälligen Samplings. Darüber hinaus stellen wir ein modulares Framework zur Modellierung anisotroper Schädigung vor. Unser Konzept der Extraktionstensoren und Schädigungsfunktionen ermöglicht die Beschreibung komplexer Vorgänge. Darüber hinaus schlagen wir einen ganzheitlichen Multiskalenansatz zur Bestimmung anisotroper Versagenskriterien vor. - We introduce an algorithm that allows for a fast generation of SMC composite microstructures. An exact closure approximation and a quasi-random orientation sampling ensure high fidelity. Furthermore, we present a modular framework for anisotropic damage evolution. Our concept of extraction tensors and damage-hardening functions enables the description of complex damage-degradation. In addition, we propose a holistic multiscale approach for constructing anisotropic failure criteria.

Author : Wicht, Daniel
Publisher : KIT Scientific Publishing
Page : 336 pages
File Size : 51,9 Mb
Release : 2022-10-11
Category : Science
ISBN : 9783731512202

Get Book

Efficient fast Fourier transform-based solvers for computing the thermomechanical behavior of applied materials by Wicht, Daniel Pdf

The mechanical behavior of many applied materials arises from their microstructure. Thus, to aid the design, development and industrialization of new materials, robust computational homogenization methods are indispensable. The present thesis is devoted to investigating and developing FFT-based micromechanics solvers for efficiently computing the (thermo)mechanical response of nonlinear composite materials with complex microstructures.

Author : Erdle, Hannes
Publisher : KIT Scientific Publishing
Page : 184 pages
File Size : 47,6 Mb
Release : 2022-07-12
Category : Technology & Engineering
ISBN : 9783731511960

Get Book

Modeling of Dislocation - Grain Boundary Interactions in Gradient Crystal Plasticity Theories by Erdle, Hannes Pdf

A physically-based dislocation theory of plasticity is derived within an extended continuum mechanical context. Thermodynamically consistent flow rules at the grain boundaries are derived. With an analytical solution of a three-phase periodic laminate, dislocation pile-up at grain boundaries and dislocation transmission through the grain boundaries are investigated. For the finite element implementations, numerically efficient approaches are introduced based on accumulated field variables.

Author : Ruck, Johannes
Publisher : KIT Scientific Publishing
Page : 220 pages
File Size : 53,8 Mb
Release : 2021-05-07
Category : Technology & Engineering
ISBN : 9783731510727

Get Book

Modeling martensitic phase transformation in dual phase steels based on a sharp interface theory by Ruck, Johannes Pdf

artensite forms under rapid cooling of austenitic grains accompanied by a change of the crystal lattice. Large deformations are induced which lead to plastic dislocations. In this work a transformation model based on the sharp interface theory, set in a finite strain context is developed. Crystal plasticity effects, the kinetic of the singular surface as well as a simple model of the inheritance from austenite dislocations into martensite are accounted for.

Author : Hölz, Peter
Publisher : KIT Scientific Publishing
Page : 294 pages
File Size : 53,7 Mb
Release : 2020-07-08
Category : Technology & Engineering
ISBN : 9783731509882

Get Book

A dynamic and statistical analysis of the temperature- and fatigue behavior of a race power unit – The effect of different thermodynamic states by Hölz, Peter Pdf

Author : Prahs, Andreas
Publisher : KIT Scientific Publishing
Page : 182 pages
File Size : 40,6 Mb
Release : 2020-09-15
Category : Technology & Engineering
ISBN : 9783731510253

Get Book

A Gradient Crystal Plasticity Theory Based on an Extended Energy Balance by Prahs, Andreas Pdf

An overview of different methods for the derivation of extended continuum models is given. A gradient plasticity theory is established in the context of small deformations and single slip by considering the invariance of an extended energy balance with respect to Euclidean transformations, where the plastic slip is considered as an additional degree of freedom. Thermodynamically consistent flow rules at the grain boundary are derived. The theory is applied to a two- and a three-phase laminate.

Author : Schemmann, Malte
Publisher : KIT Scientific Publishing
Page : 194 pages
File Size : 43,6 Mb
Release : 2018-11-09
Category : Electronic
ISBN : 9783731508182

Get Book

Biaxial Characterization and Mean-field Based Damage Modeling of Sheet Molding Compound Composites by Schemmann, Malte Pdf

Author : Alan T. Riga,C. Michael Neag
Publisher : ASTM International
Page : 198 pages
File Size : 40,9 Mb
Release : 1991
Category : Materials
ISBN : 9780803114340

Get Book

Materials Characterization by Thermomechanical Analysis by Alan T. Riga,C. Michael Neag Pdf

Fifteen papers from the symposium held in Philadelphia, March 1990, examine the uses of thermomechanical analysis and thermodilatometry in materials science, addressing instrumentation, techniques, and applications. Annotation copyright Book News, Inc. Portland, Or.