Computational micromechanics of fiber kinking in unidirectional FRP under different environmental conditions

Published on May 26, 2017in Composites Science and Technology7.094
· DOI :10.1016/J.COMPSCITECH.2017.03.014
F. Naya9
Estimated H-index: 9
(IMDEA),
Miguel González Herráez12
Estimated H-index: 12
(IMDEA)
+ 3 AuthorsF. Pons2
Estimated H-index: 2
(EADS: Airbus)
Sources
Abstract
Abstract The determination of ply properties of Fiber Reinforced Polymers (FRP) for particular operational environmental conditions in aeronautical applications is mandatory in order to fulfill current industry stringent certification requirements. However, the traditional experimental approach requires massive investments of resources and time. From the behaviour obtained experimentally, constitutive equations including failure criteria are then devised to be used in the design of FRP structures. The ply longitudinal behaviour under compression is generally the most difficult to measure and characterize. In this work, an alternative coupled experimental-computational micromechanics approach is proposed to determine the longitudinal compression properties of unidirectional FRP plies under different environmental conditions. This methodology includes experimental characterization of matrix and fiber/matrix interface, combined with numerical simulations of realistic microstructures. The interface decohesion is simulated using cohesive-frictional interactions. A pressure dependent, elasto-plastic model that includes tensile damage is employed to capture the matrix nonlinear behaviour. The numerical predictions match the experimentally-obtained ply properties available in the literature in a remarkable way and suggest that virtual ply property characterization is a mature and reliable approach to conduct screening of materials.
📖 Papers frequently viewed together
92 Citations
77 Citations
604 Citations
References45
Newest
#1F. Naya (IMDEA)H-Index: 9
#2C. González (UPM: Technical University of Madrid)H-Index: 4
Last. F. Pons (EADS: Airbus)H-Index: 2
view all 5 authors...
Abstract Qualification of Fiber Reinforced Polymer materials (FRP’s) for manufacturing of structural components in the aerospace industry is usually associated with extensive and costly experimental campaigns. The burden of testing is immense and materials should be characterized under different loading states (tension, compression, shear) and environmental conditions (temperature, humidity) to probe their structural integrity during service life. Recent developments in multiscale simulation, to...
92 CitationsSource
#1F. Naya (IMDEA)H-Index: 9
#2Jon M. Molina-Aldareguia (IMDEA)H-Index: 40
Last. Javier LLorca (UPM: Technical University of Madrid)H-Index: 73
view all 5 authors...
A novel methodology is presented and applied to measure the shear interface strength of fiber-reinforced polymers. The strategy is based in fiber push-in tests carried out on the central fiber of highly-packed fiber clusters with hexagonal symmetry, and it is supported by a detailed finite element analysis of the push-in test to account for the influence of hygrothermal residual stresses, fiber constraint and fiber anisotropy on the interface strength. Examples of application are presented to de...
17 CitationsSource
#1Miguel González Herráez (IMDEA)H-Index: 12
#2Andrea Fernández (IMDEA)H-Index: 3
Last. Carlos González (IMDEA)H-Index: 42
view all 4 authors...
The characterization of the strength and fracture toughness of three common structural fibres, E-glass, AS4 carbon and Kevlar KM2, is presented in this work. The notched specimens were prepared by means of selective carving of individual fibres by means of the focused ion beam. A straight-fronted edge notch was introduced in a plane perpendicular to the fibre axis, with the relative notch depth being a 0 / D ≈0.1 and the notch radius at the tip approximately 50 nm. The selection of the appropria...
30 CitationsSource
The subject of this work is the investigation of the influence of voids on the mechanical properties of fibre-reinforced polymers (FRPs) under compression loading. To specify the damage accumulation of FRPs in the presence of voids, the complex three-dimensional structure of the composite including voids was analysed and a reduced mechanical model composite was derived. The hierarchical analysis of the model composite on a micro-scale level implies the description of the stress and strain behavi...
6 CitationsSource
#1Xiaoming Bai (NU: Northwestern University)H-Index: 1
#2Miguel A. Bessa (NU: Northwestern University)H-Index: 15
Last. Wing Kam Liu (NU: Northwestern University)H-Index: 108
view all 6 authors...
Abstract An experimentally validated micro-scale analysis of the visco-thermo-mechanical behavior of polymer matrix composites under different loads is proposed. A new constitutive law for the matrix material is developed taking into account the pressure dependence of the material as well as strain-rate and temperature dependence. Capturing the matrix behavior under multi-axial stress states is concluded to be essential to accurately predict the composite material behavior, even when considering...
56 CitationsSource
#1Miguel González Herráez (IMDEA)H-Index: 12
#2Diego Mora (IMDEA)H-Index: 1
Last. Javier LLorca (UPM: Technical University of Madrid)H-Index: 73
view all 6 authors...
Abstract Transverse cracking in cross-ply carbon/epoxy and glass/epoxy laminates in tension is analyzed by means of computational micromechanics. Longitudinal plies were modeled as homogenized, anisotropic elastic solids while the actual fiber distribution was included in the transverse plies. The mechanical response was obtained by the finite element analysis of a long representative volume element of the laminate. Damage in the transverse plies was triggered by interface decohesion and matrix ...
77 CitationsSource
#1Michael W. Czabaj (UofU: University of Utah)H-Index: 12
#2Mark L. Riccio (Cornell University)H-Index: 22
Last. William W. Whitacre (Charles Stark Draper Laboratory)H-Index: 4
view all 3 authors...
Abstract This study presents a combined experimental and computational effort aimed at high-resolution 3D imaging, visualization, and numerical reconstruction of a fiber-reinforced polymer (FRP) composite microstructure at the constituent-level length scale. A unidirectional sample of graphite/epoxy composite is imaged at sub-micron resolution using a 3D X-ray computed tomography microscope. The numerical reconstruction is enabled by a novel segmentation algorithm, which is developed using conce...
63 CitationsSource
#1Danial Ashouri Vajari (DTU: Technical University of Denmark)H-Index: 4
#2Carlos Gonzalez (IMDEA)H-Index: 6
Last. Brian Nyvang Legarth (DTU: Technical University of Denmark)H-Index: 12
view all 4 authors...
Abstract The effect of porosity on the transverse mechanical properties of unidirectional fiber-reinforced composites is studied by means of computational micromechanics. The composite behavior is simulated by the finite element analysis of a representative volume element of the composite microstructure in which the random distribution of fibers and the voids are explicitly included. Two types of voids – interfiber voids and matrix voids – were included in the microstructure and the actual damag...
55 CitationsSource
#1Silvestre T. PinhoH-Index: 42
#2Carlos G. DavilaH-Index: 33
Last. Paul RobinsonH-Index: 39
view all 5 authors...
AbstractA set of three-dimensional failure criteria for laminated fiber-reinforced composites,denoted LaRC04, is proposed. The criteria are based on physical models for eachfailure mode and take into consideration non-linear matrix shear behaviour. Themodel for matrix compressive failure is based on the Mohr-Coulomb criterion and itpredicts the fracture angle. Fiber kinking is triggered by an initial fiber misalignmentangle and by the rotation of the fibers during compressive loading. The plane offi...
225 Citations
#1António R. Melro (National Institute of Statistics and Geography)H-Index: 12
#2Pedro P. Camanho (University of Porto)H-Index: 70
Last. Silvestre T. Pinho (Imperial College London)H-Index: 42
view all 4 authors...
Abstract This paper presents the application of a new constitutive damage model for an epoxy matrix on micromechanical analyses of polymer composite materials. Different representative volume elements (RVEs) are developed with a random distribution of fibres. Upon application of periodic boundary conditions (PBCs) on the RVEs, different loading scenarios are applied and the mechanical response of the composite studied. Focus is given to the influence of the interface between fibre and matrix, as...
134 CitationsSource
Cited By63
Newest
#1Haibin Tang (Nanjing University of Science and Technology)H-Index: 5
#2Guowei Zhou (SJTU: Shanghai Jiao Tong University)H-Index: 11
Last. Xuming Su (Ford Motor Company)H-Index: 18
view all 7 authors...
Abstract null null null With a better balance among good mechanical performance, high freedom of design, and low material and manufacturing cost, chopped carbon fiber chip reinforced null sheet molding compound null null null (SMC) composites show great potential in different engineering applications. In this paper, bending fatigue behaviors of SMC composites considering the heterogeneous null fiber orientation distributions null have been thoroughly investigated utilizing both experimental and ...
Source
view all 8 authors...
Source
#1G. Pappas (ETH Zurich)H-Index: 8
#2Arthur Schlothauer (ETH Zurich)H-Index: 2
Last. Paolo Ermanni (ETH Zurich)H-Index: 33
view all 3 authors...
Abstract null null In this work, the impact of high stress gradients, found in bending of thin unidirectional fiber reinforced shells (∼0.1 to 1 mm), on compressive micro-buckling failure, was analyzed. Such thin shells show increased resistance to compressive failure under high curvatures, which may even allow tensile fiber damage to drive ultimate failure for very low thickness (e.g.
Source
#1Ernesto Camarena (SNL: Sandia National Laboratories)
#2Ryan J. Clarke (SNL: Sandia National Laboratories)
Last. Brandon Lee Ennis (SNL: Sandia National Laboratories)H-Index: 8
view all 3 authors...
Abstract An approach to increase the value of carbon fiber for wind turbines blades, and other compressive strength driven designs, is to identify pathways to increase its cost-specific compressive strength. A finite element model has been developed to evaluate the predictiveness of current finite element methods and to lay groundwork for future studies that focus on improving the cost-specific compressive strength. Parametric studies are conducted to understand which uncertainties in the model ...
Source
#1Haibin Tang (Nanjing University of Science and Technology)H-Index: 5
#2Qingping Sun (Ford Motor Company)H-Index: 8
Last. Wentao Yan (NUS: National University of Singapore)H-Index: 18
view all 5 authors...
Abstract Fused filament fabrication (FFF) with continuous carbon fiber filaments has proven to be a promising manufacturing technique in engineering applications. To provide guidance in the design of 3D printed carbon fiber reinforced polymer (CFPR) components, the longitudinal compression failure of continuous CFPR composites using the FFF technique is investigated systematically. First, longitudinal compression tests are performed for 3D printed continuous CFRP composites with and without desi...
1 CitationsSource
#1Xinyu Hui (NPU: Northwestern Polytechnical University)H-Index: 1
#2Yingjie Xu (NPU: Northwestern Polytechnical University)H-Index: 17
Last. Weihong Zhang (NPU: Northwestern Polytechnical University)H-Index: 61
view all 4 authors...
Abstract Cure-induced residual stresses have a great impact on the mechanical behavior of carbon fiber reinforced polymer (CFRP) composites. This paper develops an integrated analytical framework to study the effect of the cure-induced residual stresses on the mechanical behavior of unidirectional IM7/8552 composites. During the curing process, evolution of the material properties of the resin matrix is captured using the cure hardening instantaneous linear elastic (CHILE) model. In addition to ...
3 CitationsSource
#1Tao Zheng (HIT: Harbin Institute of Technology)H-Index: 1
#2Licheng Guo (HIT: Harbin Institute of Technology)H-Index: 26
Last. Hongjun Yu (HIT: Harbin Institute of Technology)
view all 5 authors...
Abstract This paper investigates the compressive damage mechanisms of 3D woven composites through a coupled numerical-experimental approach. A comprehensive progressive damage model, capable of characterizing the fiber kinking failure, transverse inter-fiber crack, matrix damage and interfacial debonding, is developed to capture the damage accumulations by incorporating a novel fracture angle-dependent stress reduction scheme, and the numerical implementation is accomplished accordingly. Accordi...
2 CitationsSource
Abstract This work presents a numerical approach to multi-routines based on experiments to analyse the effects on the strength of a cross-ply glass fibre reinforced plastics (GFRP) after immersion in sulphuric acid solution under pressure (5% H 2 SO 4 solution, 95° C, 15 bar). Two alternative vinyl ester resins (bisphenol-A diglycidyl ether and epoxy phenol novolac) were investigated. After 0.5, 1, 1.5 and 2 years of conditioning, the specimens were mechanically tested. The definition of the mat...
Source
#1Paulina Diaz Montiel (SDSU: San Diego State University)H-Index: 1
#2Satchi Venkataraman (SDSU: San Diego State University)H-Index: 14
Last. Hyonny Kim (UCSD: University of California, San Diego)H-Index: 13
view all 3 authors...
Source
#1Giuseppe Catalanotti ('QUB': Queen's University Belfast)H-Index: 22
#2L.F. Varandas ('QUB': Queen's University Belfast)H-Index: 5
Last. Brian Falzon ('QUB': Queen's University Belfast)H-Index: 28
view all 6 authors...
Abstract A micromechanics framework for modelling the longitudinal failure of unidirectional fibre composites, in both tension and compression, is presented. Appropriate constitutive models are used for the different constituents (i.e., fibre and matrix) and interfaces. An algorithm for the generation of the fibre misalignment is reported. It combines a stochastic process with an optimization procedure in order to match the numerical and experimental misalignment angle distributions. Two alterna...
2 CitationsSource