131 research outputs found
A piecewise exponential model for three-dimensional analysis of sandwich panels with arbitrarily graded core
Open Access funded by Engineering and Physical Sciences Research Council Acknowledgements Financial support of this research by the EPSRC (Engineering and Physical Sciences Research Council) (EP/P503299/1, EP/P503930/1), United Kingdom, is gratefully acknowledged.Peer reviewedPublisher PD
Modelling Cracked Cross-Ply Laminates with Delamination Buckling
Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG gefƶrderten) Allianz- bzw. Nationallizenz frei zugƤnglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively
Matrix cracking in polymeric composites laminates: Modelling and experiments
Composites ability to retain functionality in the presence of damage is a crucial safety and economic issue. Generally the first damage mode in composite laminates is matrix cracking, which affects the mechanical properties of the structure long before its load-bearing capacity is exhausted. In this paper, a detailed analysis of the effect of matrix cracking on the behaviour of cross-ply [0/90]s and unbalanced symmetric [0/45]s glass/epoxy laminates loaded statically in tension is performed. Theoretical predictions of stiffness reduction due to damage are based on the Equivalent Constraint Model (ECM), which takes into account concurrent matrix cracking in all plies of the laminate, although matrix cracking under consideration is developing only within the off-axis ply of the laminates. The longitudinal Youngās modulus predictions are compared to experimentally derived data obtained using laser Raman spectroscopy (LRS). The good agreement between predicted and measured values of the reduced longitudinal Youngās modulus validates the ECM model and proves that its basic assumptions are accurate. Thus, the predictions for all the mechanical properties by the ECM model are within a realistic range, while experimental evidence is required for further validation
Performance of functionally graded plates under localised transverse loading
AbstractThis paper presents a study of the bending of an isotropic functionally graded plate under localised transverse load through a combination of analytical and computational means. The analytical modelling is based on the recently developed three-dimensional elasticity solution, expanded to cover different loading types, whilst the Finite Element model uses graded isoparametric elements. The plate under consideration is assumed to be simply supported, with Youngās and shear moduli varying exponentially through the thickness and the Poissonās ratio constant. Comparative analysis of stress and displacement fields in functionally graded and homogeneous plates subjected to uniformly distributed and patch loadings is carried out
Three-dimensional elasticity analysis of sandwich panels with functionally graded transversely isotropic core
Open Access via Springer Compact Agreement. Financial support of this research by the EPSRC DTA is gratefully acknowledgedPeer reviewedPublisher PD
Predicting residual stiffness of cracked composite laminates subjected to multi-axial inplane loading
Funding This research arises from work carried out under EPSRC/GR/L51348 grant. Acknowledgments Financial support from UKās Engineering and Physical Sciences Research Council is gratefully acknowledged.Peer reviewedPostprin
Modelling of stiffness degradation due to cracking in laminates subjected to multi-axial loading
Funding Financial support of this research by the Engineering and Physical Sciences Research Council (EPSRC/GR/L51348) and the British Ministry of Defence is gratefully acknowledged.Peer reviewedPostprin
Development of the consistent second-order plate theory for transversely isotropic plates and its analytical assessment from the three-dimensional perspective
Financial support of this research by The Royal Society (UK) International Exchanges award (IE161021) and by the German Science Foundation (DFG) under Project-No. Ki 284/25-1 is gratefully acknowledgedPeer reviewedPostprin
Three-dimensional elastic deformation of functionally graded isotropic plates under point loading
Acknowledgement Financial support of this research by The Royal Society (UK) under grant number JP090633 is gratefully acknowledged.Peer reviewedPostprin
Analysis of multiple cracking in metal/ceramic composites with lamellar microstructure
Financial support of this research by The Royal Society, UK (IE121116), The Carnegie Trust for the Universities of Scotland, UK (Trust Reference 31747) and DFG (PI 785/3-2, PI 785/1-2), Germany, is gratefully acknowledged. We thank Dr. S. Roy (KIT) for providing the microstructure images and Professor I. Tsukrov (University of New Hampshire, USA) for helpful discussions.Peer reviewedPostprin
- ā¦