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A computational tool for investigations on the lifetime estimation of multi-directional laminates under multiaxial stress states based on layerwise structural analysis

  • In the present paper a calculation tool for the lifetime prediction of composite materials with focus on local multiaxial stress states and different local stress ratios within each lamina is developed. The approach is based on repetitiv, progressive in-plane stress calculations using classical laminate theory with subsequent analysis of the material stressing effort and use of appropriate material degradation models. Therefore experimentally data of S-N curves are used to generate anistropic constant life diagrams for a closer examination of critical fracture planes under any given combination of local stress ratios. The model is verified against various balanced angle plies and multi-directional laminates with arbitrary stacking sequences and varying stress ratios throughout the analysis. Different sections of the model, such as residual strength and residual stiffness, are examined and verified over a wide range of load cycles. The obtained results agree very well with the analyzed experimental data.

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Author:Marc Möller, Jochen Blaurock, Gerhard Ziegmann, Alfons Esderts
Series (Serial Number):Mobility and Engineering Research (MER) (1/2018)
Document Type:Working Paper
Year of Completion:2018
Release Date:2018/08/17
Tag:Composite Materials; Lifetime Prediction; Multiaxial Fatigue; Plywise Analysis
GND Keyword:Material
Page Number:19
Institutes and Central Facilities:Fakultät für Fahrzeugsysteme und Produktion (F08) / Fakultät 08 / Institut für Fahrzeugtechnik
CCS-Classification:I. Computing Methodologies / I.6 SIMULATION AND MODELING (G.3) / I.6.4 Model Validation and Analysis
Dewey Decimal Classification:500 Naturwissenschaften und Mathematik / 500 Naturwissenschaften
Open Access:Open Access
Licence (German):License LogoCreative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International