Evaluation of Impact Assessment Methodologies. Part I: Applied Methods (2009)
Kärger, Luise, Baaran, Jens, Gunnion, A., Thomson, R.
The present paper is the first part of a comparative evaluation of two methodologies for the analysis of damage in composites. The subject of the investigation is low-velocity impact and residual...
Evaluation of Impact Assessment Methodologies. Part II: Experimental Validation (2009)
Kärger, Luise, Baaran, Jens, Gunnion, A., Thomson, R.
The present paper is the second part of an evaluation study of the impact simulation tools CODAC and IDAT. While in Part I the methodologies for stress analysis, failure detection, material...
Residual strength prediction of impacted composite sandwich structures (2008)
The paper presents two methods for predicting the in-plane compression strength of impact damaged sandwich structures. For developing these methods uniaxial in-plane compression tests of impact...
Schadensdatenbank für Faserverbundpaneele (2008)
Steinbach, Mathias, Baaran, Jens
Diese Diplomarbeit ist im Rahmen der Modularisierung der DLR Finite-Element Software CODAC (Composite Damage Tolerance Analysis Code) entstanden. Hierfür wurde eine Da-tenbank aufgesetzt, in die...
Efficient prediction of damage resistance and tolerance of composite aerospace structures (2008)
Baaran, Jens, Kärger, Luise, Wetzel, Anja
The present work introduces efficient methodologies based on the finite-element method for a quick evaluation of damage resistance and damage tolerance of composite aerospace structures. Monolithic,...
Efficient simulation of low-velocity impacts on composite sandwich panels (2008)
Kärger, Luise, Baaran, Jens, Teßmer, Jan
For efficiently simulating the damage resistance of sandwich panels subjected to low-velocity impacts, the finite element based damage tolerance tool CODAC has been enhanced. While sandwich...
Schlussbericht KRAFT Versagenskriterien und Analyse von Faserverbund-Rumpf-Tragwerken (2007)
Aschenbrenner, Lars, Baaran, Jens, Degenhardt, Richard, Kärger, Luise, Temmen, Hubert, Teßmer, Jan, ...
Rapid simulation of impacts on composite sandwich panels inducing barely visible damage (2007)
Kärger, Luise, Baaran, Jens, Teßmer, Jan
The finite element based design tool, CODAC, has been developed for efficiently simulating the impact behavior of sandwich structures consisting of two composite face sheets and a compliant core. To...
Potentials and Limitation of FE-based Simulation Methods for Fibre Composite Structures (2007)
Kling, Alexander, Kärger, Luise, Baaran, Jens, Teßmer, Jan
Current industrial demands for fibre composite primary structures in the area of aeronautics require innovative, experimentally validated simulation methods and tools, to support a cost and weight...
Experimental validation of efficient impact simulation methodologies of sandwich structures (2007)
Kärger, Luise, Baaran, Jens, Teßmer, Jan
Aircraft design calls for weight efficient shell constructions. Composite sandwich structures satisfy this demand by the combination of two thin, stiff face sheets and an intermediate lightweight...
Experimental Validation of Efficient Impact Simulation Methodologies for Sandwich Structures (2007)
Kärger, Luise, Baaran, Jens, Teßmer, Jan
Aircraft design calls for weight efficient shell constructions. Composite sandwich structures satisfy this demand by the combination of two thin, stiff face sheets and an intermediate lightweight...
Untersuchung Bruchmechanischer Fragestellungen mit CODAC (2007)
Altendorf, Dennis, Baaran, Jens
Berechnung der Rissausbreitung des Bruchmodus I und des Bruchmodus II auf analytischem Weg. Vergleichsrechnung der Bruchmoden mit CODAC.
Xiao, Y., Baaran, Jens, Gädke, Michael
PREDICTION OF FATIGUE LIFE AND RESIDUAL STRENGTH AFTER FATIGUE LOADING FOR COMPOSITE LAMINATES
The determination of the effective mass and moment of inertia of a pendulum impactor (2004)
Van Huffelen, Rolf, Zipfel, Ary, Baaran, Jens
Impact tests can be performed by using a drop weight or a pendulum as is being done within the DLR. In order to simulate the impact tests within the CODAC program it is necessary to know the...
Bestimmung der Degradation von Faserverbundwerkstoffen mit dem Equivalent Constraint Model (2003)
Greskamp, Marius, Baaran, Jens
Wegen des steigenden Einsatzes von Faserverbundwerkstoffen (FVW), allen voran im Flugzeugbau, ist es wichtig ein umfassendes Verständnis der Eigenschaften dieses Materials für die sichere Auslegung...
Schallfeldanalyse bei sich bewegenden schallerzeugenden Körpern / (1999)
Zugl.: Braunschweig, Techn. Univ., Diss., 1999.