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Stochastic Computational Modeling of the Fracturing Behavior in Discontinuous Fiber Composite Structures


Title: Stochastic Computational Modeling of the Fracturing Behavior in Discontinuous Fiber Composite Structures

Authors: Seunghyun Ko, Jinkyu Yang, Mark E. Tuttle and Marco Salviato

DOI: 10.33599/nasampe/s.20.0182

Abstract: In this study, we numerically investigate the mode I intra-laminar fracture and size effect of Discontinuous Fiber Composites (DFCs) as a function of the platelet sizes and the structure thicknesses. First, the complex 3D mesostructures of DFCs are generated using a random platelet generation algorithm. The algorithm explicitly generates stacks of platelets into pre-defined partitions. Each partition stores unique platelet orientation and associated thickness. The partitioned morphology is transferred to a Finite Element (FE) model. The in-plane damage mechanisms are captured by a quasibrittle failure criterion whereas the out-of-plane inter-platelet damage is captured by cohesive elements. The stochastic FE model is calibrated using size effect experiments of a single platelet size and thickness. After the calibration, the model captures the effects of different platelet sizes as well as the change in thickness. Additionally, the model provides unique insights on the change in damage mechanisms of DFCs with respect to the platelet morphology. By simulating different mesostructures, we can further extend the effects of platelet sizes and the thicknesses beyond the experimental results.

References: 1. J. Fudge, “Chopped prepregs – compelling performance and cost effective material.” SAMPE conference 41st ITSC, Wichita KS Oct 19-22nd, 2009. 2. GP Picher-Martel, A. Levy, P. Huber. “Compression moulding of Carbon/PEEK randomly-oriented strands composites: A 2D finite element model to predict the squeeze flow behavior.” Comp Part A 2016;81:67-77 3. B. Boursier, A. Lopez. "Failure initiation and effect of defects in structural discontinuous fiber composites", Hexcel Research and Technology, 2010. 4. P. Feraboli, E. Peitso, F. Deleo, T. Cleveland. “Characterization of prepreg-based discontinuous carbon fiber/epoxy systems.” J Reinf Plast Compos 2009;28(10):1191–214. 5. M. Selezneva, L. Lessard. “Characterization of mechanical properties of randomly oriented strand thermoplastic composites.” J Compos mater 2016;50(20):2833-51. 6. S. Kravchenko, D. Sommer, B. Denos, W. Avery, R.B. Pipes. “Structure-property relationship for a prepreg platelet molded composite with engineered meso-morphology.” Compos Struct 2019;210:430-45. 7. S. Kravchenko, D. Sommer, B. Denos, A. Favaloro, C. Tow, W. Avery, R.B. Pipes. “Tensile properties of a stochastic prepreg platelet molded composite.” Comp Part A 2019;124:105507. 8. S. Kravchenko, D. Sommer, R.B. Pipes. “Uniaxial strength of a composite array of overlaid and aligned prepreg platelets.” Comp Part A 2018;109:31-47. 9. S. Ko, J. Davey, S. Douglass, J. Yang, M.E. Tuttle, M. Salviato. “Effect of the thickness on the fracturing behavior of discontinuous fiber composite structures.” Comp Part A 2019;125:105520. 10. S. Ko, J. Yang, M.E. Tuttle, M. Salviato. “Effect of the platelet size on the fracturing behavior and size effect of discontinuous fiber composite structures.” Comp Struct 2019;227:111245. 11. B. Denos, D. Sommer, A. Favaloro, R.B. Pipes, W. Avery. “Simulation of prepreg platelet compression molding: method and orientation validation.” J Rheol 2018;62(2):1443-55. 12. L. Martulli, L. Muyshondt, M. Kerschbaum, S. Pimenta, S.V. Lomov, Y. Swolfs. “Carbon fibre sheet moulding compounds with high in-mould flow: Linking morphology to tensile and compressive properties.” Comp Part A 2019;126:105600 13. Y. Wan, I. Straumit, J. Takahashi, S.V. Lomov. “Micro-CT analysis of the orientation unevenness in randomly chopped strand composites in relation to the strand length.” Comp Struct 2018;206:865-875. 14. Z. Chen, T. Huang, Y. Shao, Y. Li, H. Xu, K. Avery, D. Zeng, W. Chen, X. Su. “Multiscale finite element modeling of sheet molding compound (SMC) composite structure based on stochastic mesostructure reconstruction.” Comp Struct 2018;188:25-38 15. M. Selezneva, S. Roy, S. Meldrum, L. Lessard, A. Yousefpour. “Modelling of mechanical properties of randomly oriented strand thermoplastic composites.” J Compos Mater 2017;51:831-45. 16. Y. Li, S. Pimenta, J. Singgih, S. Nothdurfter, K. Schuffenhauer. “Experimental investigation of randomly-oriented tow-based discontinuous composites and their equivalent laminates.” Comp Part A 2017;102:64-75 17. Y. Li, Z. Chen, L. Su, W. Chen, X. Jin, H. Xu. “Stochastic reconstruction and microstructure modeling of SMC chopped fiber composites.” Comp Struct 2018;200:153-164. 18. S. Ko, K. Chan, R. Hawkins, R. Jayaram, C. Lynch, R. El Mamoune, et al. “Characterization and computational modeling of the fracture behavior in discontinuous fiber composite structure.” SAMPE Conference, Long Beach, CA. 21-24 May 2018. 19. Dassault Systemes ABAQUS. ABAQUS Documentation. Providence, RI; 2018. 20. Z. Hashin. “Failure criteria for unidirectional fiber composites.” J Applied Mechanics 1980;47:329-34. 21. Z.P. Bažant, J. Planas. “Fracture and size effect in concrete and other quasibrittle materials.” CRC press; 1998. 22. M. Salviato, K. Kirane, Z.P. Bažant, G. Cusatis. “Experimental and numerical investigation of intra-laminar size effect in textile composites.” Comps Sci Technology 2016;135:67-75. 23. M. Salviato, K. Kirane, Z.P. Bažant, G. Cusatis. “Mode I and II interlaminar fracture in laminated composites: A size effect study.” Journal of Applied Mechanics 2019;86:091008. 24. Y. Li, S. Pimenta. “Development and assessment of modelling strategies to predict failure in tow-based discontinuous composites.” Comp Struct 2019;209:1005-1021. 25. M. Selezneva. “Experimental and theoretical investigations of mechanical properties of randomly-oriented strand (ROS) composites.” PhD dissertation, McGill University, Montreal, 2015. 26. Y. Qiao, M. Salviato. “Strength and cohesive behavior of thermoset polymers at the microscale: A size-effect study.” Eng Fract Mech 2019;213:100-117. 27. M. C. Preetam, S.V. Lloyd. “Effect of bond quality on crack growth resistance of adhesively bonded composite joints under static and cyclic loading.” SAMPE Conference, Seattle, WA. 22-25 May 2017. 28. Y. Wan, J. Takahashi “Tensile and compressive properties of chopped carbon fiber tapes reinforced thermoplastics with different fiber lengths and molding pressures.” Comp Part A. 2016;87:271-281. 29. G. Milakantan, S. Nutt. “Reuse and upcycling of thermoset prepreg scrap: Case study with out-of-autoclave carbon fiber/epoxy prepreg.” J Compos Mater 2018;52:341-360. 30. Digimat User’s Manual. Version 2017.0, e-Xstream Engineering. MSC.

Conference: SAMPE 2020 | Virtual Series

Publication Date: 2020/06/01

SKU: TP20-0000000182

Pages: 12

Price: FREE

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