Fatigue damage on CFRP plates under bending by thermographic and UT analysis, aided with FEM-DIC prediction
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In this paper, a combination of numerical and experimental methodology for delamination evolution analysis on unidirectional CFRP elements under fatigue is suggested, which is based on experimental procedures to better detect and predict damage initiation and growth.Abstract:
In this article, a combination of numerical and experimental methodology for delamination evolution analysis on unidirectional CFRP elements under fatigue is suggested. Fiber-reinforced composite structures exhibit continuous damage accumulation with degradation of effective mechanical properties during cyclic HCF loads. Since advanced composites applications are allowed after extensive experimental certification tests, proposed work is based on experimental procedures to better detect and predict damage initiation and growth, monitoring static displacements and strains under 4-points bending by digital image correlation and measuring compliance variation under fatigue. In addition, non-destructive investigation of composite plates is conducted during cycling tests by using infrared thermography and ultrasonic measurements to detect damage location and validate FEM predictions. Experimental results are analyzed and compared, employing also digital image correlation technique; in addition, thermographic and ultrasonic monitoring inspection with Matlab elaborated measurements are implemented to check results for fatigue damage analysis of same specimens.read more
Citations
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Journal ArticleDOI
Fatigue and damage analysis on aeronautical CFRP elements under tension and bending loads: Two cases of study
Francesco W. Panella,A. Pirinu +1 more
TL;DR: In this paper, the authors focused on experimental monitoring procedures to investigate stresses and damage settlement during fatigue tests of CFRP elements under bending and tensile loads, coupled with mechanical properties degradation, during long lasting HC fatigue loads.
Journal ArticleDOI
Full-field monitoring methods for damage analysis on aeronautical CFRP specimens under fatigue loads
TL;DR: In this article , two different experimental methodologies based on thermographic techniques and displacement measurements with Digital Image Correlation (DIC) analysis are employed for damage settlement and evolution to be detected up to failure, together with correspondent compliance analysis.
Proceedings ArticleDOI
Full-field monitoring methods for damage analysis on aeronautical CFRP specimens under fatigue loads
TL;DR: In this article , two different experimental methodologies based on thermographic techniques and displacement measurements with Digital Image Correlation (DIC) analysis are employed for damage settlement and evolution to be detected up to failure, together with correspondent compliance analysis.
Proceedings ArticleDOI
Mechanical and fatigue behaviour of Sandwich elements with ABS core cells and GFRP plies, as function of cellular geometry and process parameters
TL;DR: In this paper , the authors apply the potential of FDM (Fused Deposition Modelling) technology with economic printing machine, in order to create performant ABS cores, to be subsequently used as shaped moulds for sandwich plate assembly with GFRP skins, representing simple prototypes to validate production concept and its structural behaviour.
Journal ArticleDOI
Thermal and ultrasonic analysis of fatigue damaged CFRP samples under traction and bending load
Francesco W. Panella,A. Pirinu +1 more
TL;DR: In this article, an analysis of the damage to rupture behavior of the material through the mechanical tensile test and a non-destructive inspection procedure is adopted during HCF load, in order to detect in real time local compliance variations and damage initiation.
References
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Ncorr: Open-Source 2D Digital Image Correlation Matlab Software
TL;DR: Ncorr is an open-source subset-based 2D DIC package that amalgamates modern DIC algorithms proposed in the literature with additional enhancements and several applications of Ncorr that both validate it and showcase its capabilities are discussed.
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A new rapid thermographic method to assess the fatigue limit in GFRP composites
TL;DR: In this paper, a new procedure for the evaluation of fatigue limit and the monitoring of damage in GFRP material by means of thermography was proposed, which provides results in good agreement with those attained by the standard test methods.
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Nonlinear ultrasound modelling and validation of fatigue damage
TL;DR: In this paper, a nonlinear constitutive material model was developed to predict the structural response under continuous harmonic excitation of a fatigued isotropic sample that showed anharmonic effects.
Journal ArticleDOI
Study of damage evolution in composite materials based on the Thermoelastic Phase Analysis (TPA) method
TL;DR: In this article, the phase of the thermal signal associated with intrinsic dissipation processes occurring in the material has been used to localize and assess the damaged areas in a quantitative manner, leading to an evaluation of the endurance limit of composites.