Multiscale analysis of damage progression in newly designed UACS laminates

Li, Hang; Wang, Wen Xue; Matsubara, Terutake

doi:10.1016/j.compositesa.2013.11.003

Cited by 16 publications

(14 citation statements)

References 21 publications

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“…These results are obtained according to the variation of FI 1 , FI 2 , and d of the model. It was found that parameters from FI 3 to FI 6 show little effect on the damage of notched UACS laminate, which is consistent with the previous observation [11].…”

Section: Resultssupporting

confidence: 91%

“…Therefore, it is necessary to clarify mechanical properties and failure mechanism of UACS laminates with an open hole under different load conditions, as well as the relationship between the strength and the size of open holes, before the wide application of UACS laminates. As seen from previous research [7][8][9][10][11][12], it could be concluded that UACS laminates with bi-angled slits have the best mechanical properties, including tensile strength, compression strength, specific energy absorption, and flowability during curing, among the existing four kinds of UACS laminates. Therefore, in this study, open-hole UACS laminates with regularly arrayed bi-angled slits were fabricated based on the continuous CFRP prepreg using a commercial numerical control cutter.…”

Section: Introductionmentioning

confidence: 75%

“…The displacement load was added at the left edge of the model in the fiber direction of 0 o ply, as shown in Figure 6. Figure 7 shows the flowchart of the present damage analysis, adapted from the previous work [11]. It is assumed that all the elements reveal the linear elastic deformation before damage, and the damage diagnosis is conducted at each load step.…”

Section: Fem Analysis Modelmentioning

confidence: 99%

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Experimental and Numerical Research on Open-Hole Strength and Damage Mechanism of Regularly Arrayed Short Fiber Reinforced Polymer Composite

Zhang

Chen

et al. 2020

Polymers

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Laminates with unidirectionally arrayed chopped strands (UACS) are one of the advanced short fiber reinforced polymer composites (SFRP) with significant application prospect, which greatly improves mechanical properties compared to the traditional SFRP, meanwhile ensuring excellent flowability. In practice, composite laminate with an open hole is one of the typical connective components, and it is necessary to clarify the allowable load and damage tolerance performance of notched structures. In the present study, UACS laminates were fabricated using the continuous carbon fiber reinforced polymer (CFRP) prepreg, on which regularly arrayed bi-angled slits were introduced by a commercial numerical control cutter. The tensile strength and strain distribution around the open hole of the notched UACS laminate were experimentally investigated, while the damage progression near the open hole of the notched UACS laminate was analyzed by the finite element method (FEM). The tensile strength of the notched UACS laminate was measured at 298 MPa, which is about 60% of the strength of the unnotched UACS laminate. The simulation results match well with the experimental results, although there is a little overestimate on strength, by about 5% and 7%, for unnotched and notched UACS laminates, respectively. The final critical failure mode for the notched UACS laminate is mainly dominated by the delamination instead of the fiber breakage in the unnotched UACS laminate.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 75%

Section: Fem Analysis Modelmentioning

confidence: 99%

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Experimental and Numerical Research on Open-Hole Strength and Damage Mechanism of Regularly Arrayed Short Fiber Reinforced Polymer Composite

Zhang

Chen

et al. 2020

Polymers

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“…Li et al [6] proposed two newly designed ICF prepregs with discontinuous staggered angled ICFs and discontinuous bi-angled ICFs. Li et al [7] also studied the damage progression in three kinds of ICF quasi-isotropic (QI) laminates under tension by finite element simulation based on a multiscale analysis.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Behavior of Open-Holed CFRP Laminates with Initially Cut Fibers

Sudarsono¹,

Ogi²

2017

OJCM

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Carbon fiber-reinforced plastic (CFRP) laminates with initially cut fibers (ICFs) have good formability without large degradation of static strength; however, their fatigue behavior has not been investigated thus far. In this paper, we investigated fatigue behavior and damage progress of open-holed CFRP laminates with ICFs having interlayers. Three types of CFRP laminates were employed: a laminate without ICF fabricated using an autoclave (Continuous-A), a laminate with ICF fabricated using an autoclave (ICF-A) and a laminate with ICF fabricated using press molding (ICF-P).First, fatigue test was conducted to obtain S (maximum stress)-N (the number of cycles to failure) curves in order to reveal fatigue strength. The fatigue tests for several specimens were interrupted at three prescribed numbers of cycles to observe damage progress. It is found that the Continuous-A laminate shows little strength degradation in the S-N curve while fatigue strength in both ICF laminates is decreased by approximately 30% at N of 10 6 . In contrast, the damage progress of the ICF-P laminate is the least among the three laminates while the delamination progress at both edges and around the hole in the Continuous-A laminate is the most prominent.

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“…The experimental investigation of material constitutive behavior for complex strain-stress fields is time and resource consuming. To take the material complexity into account the two scale simulation method can be used effectively (Feyel and Chaboche 2000;Li et al 2014;Somer et al 2014;Rafsanjani et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Virtual characterization of MDF fiber network

et al. 2016

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A virtual design method for medium density fiberboards (MDF) is proposed with the aim to optimize the fiber orientation and lay-up of MDF. The new method estimates the stiffness and strength by using microstructure models of the MDF fiber network. The virtual design is used to improve the manufacturing technology of MDF plates with multilayer oriented fiber structure. Experimental investigations of the mechanical behavior of MDF microstructure for various fiber geometries, glue content and distribution are complicated, time consuming and expensive. On the other side, virtual microstructure design allows to develop a new wood fiber based material with less experimental work. Microstructure models help to better understand the non-linear damage mechanical behavior of a wood fiber network depending on fiber geometrical parameters. Such parameters as crack distribution and fiber deformation on micro-scale level are complicated to experimentally measure, but possible to model using computer simulations. The virtual design tool requires less empirical data. The model takes into account information on average wood fiber orientation, fiber diameter, fiber length and mechanical properties of wood fiber cell wall and glue. The numerical method for strength and stiffness analysis of MDF microstructure was calibrated using standard MDF with non-oriented fibers. It turned out that this method gives precise results for MDF with oriented fibers and even with multilayer structure. The proposed virtual microstructure design tool can significantly improve and speed-up the optimization manufacturing technology of MDF and other wood fiber based composites

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Multiscale analysis of damage progression in newly designed UACS laminates

Cited by 16 publications

References 21 publications

Experimental and Numerical Research on Open-Hole Strength and Damage Mechanism of Regularly Arrayed Short Fiber Reinforced Polymer Composite

Experimental and Numerical Research on Open-Hole Strength and Damage Mechanism of Regularly Arrayed Short Fiber Reinforced Polymer Composite

Fatigue Behavior of Open-Holed CFRP Laminates with Initially Cut Fibers

Virtual characterization of MDF fiber network

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