On the topological yarn structure of 3-D rectangular and tubular braided preforms

Wang, Y.Q.; Wang, A.S.D.

doi:10.1016/0266-3538(94)90090-6

Cited by 90 publications

(79 citation statements)

References 2 publications

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“…Over the last decades, extensive investigations have been mainly carried out [2][3][4][5][6][7][8][9][10][11][12] about the modeling of 3D braided composites. 4-step method is widely used as the basic forming technique of 3D braiding composites.…”

Section: Tow-scale Modelmentioning

confidence: 99%

“…The common numerical approach for characterizing the composite materials is to create a representative volume cell (RVC) that captures the major features of the underlying microstructure. A variety of RVC models and strategies were proposed to determine mechanical properties of 3D braided composite [2][3][4][5][6][7][8][9][10][11][12], but the work for characterization of 3D C/SiC composites has been limited compared to polymer and metal matrix composites. １ This study aims at the microstructure modeling and numerical prediction of effective CTE of 3-D braided C/SiC composite.…”

Section: Introductionmentioning

confidence: 99%

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Numerical prediction of the effective coefficient of thermal expansion of 3D braided C/SiC composite

Zhang

2009

Int. J. Simul. Multidisci. Des. Optim.

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-This paper is focused on the microstructure modeling and evaluation of effective coefficient of thermal expansion (CTE) of 3D braided carbon fiber-reinforced silicon carbide composites (C/SiC). Regarding the multi-scale characteristics of the composite, the microstructure modeling is carried out sequentially from the fiber scale to tow scale. Effective elastic properties are obtained based on the sequential homogenization from the fiber scale to the tow scale. A stain energy model is developed for the prediction of the effective CTE of composite materials. This model is based on the relationship established between the strain energy of the microstructure and that of the homogenized equivalent model under specific thermo-elastic boundary conditions. Expressions of closed-form are derived for the effective CTE in terms of the strain energy and effective elastic tensor. Numerical results obtained by the proposed model show a good agreement with the results measured experimentally.

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Section: Tow-scale Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical prediction of the effective coefficient of thermal expansion of 3D braided C/SiC composite

Zhang

2009

Int. J. Simul. Multidisci. Des. Optim.

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“…Ref. [1] contains most of the details rendered in both of the programs of this research, while Ref. [2] provides a cohesive description of the variously developed links in the virtual simulation routine; it also lists 16 published papers by this research team.…”

Section: Research Accomplishmentsmentioning

confidence: 99%

“…The initial design of a preform requires several input parameters: the yarn selected, the braiding procedure, the exact preform geometry, etc. These input parameters allow the design for the yarn carrier deployment on the braiding platform (see section 2.3, Ref [1]). The question of preform braidability may come into play as well at this design stage, as an input from design simulation.…”

Section: Research Accomplishmentsmentioning

confidence: 99%

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On Braidability and Formability for 3D Braided Structural Shapes

Wang¹

2000

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for revie maintaining the data needed, and completing and reviewing this collection of information. TITLE AND SUBTITLE On Braidability and Fomability for 3D Braided Structural Shapes AUTHOR(S)Albert S. D. Wang PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)Drexel University 32 nd & Chestnut Streets Philadelphia PA 19104 SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)AFOSR SPONSOR/MONITOR'S ACRONYM(S) SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION / AVAILABILITY STATEMENTApproval for Public Release; distribution unlimited. SUPPLEMENTARY NOTES ABSTRACTThis final report outlines the research results obtained under the AFOSR Grant F49620-97-1-0160 for the period from 1 March 1977 to 31 December 1999. The research was partially augmented by the AASET Grant F49620-96-1-0283 for the period from 1 July 1997 to 31 December 1999.The main objective of the research was to develop a rational design/analysis methodology for a class of 3D braided structural shapes for aerospace applications. Research was carried out with two concurrent programs -the experimental program and the simulation programinvolving design, braiding of performs, consolidation and shape forming, fiber architecture determination and description, mechanics modeling, testing, investigation of preform braidability and formability at the consolidation stage. SUBJECT TERMS

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A matrix computing method for visualizing switchless controlled 3D hexagonal‐annular rotary braiding process architecture

Zhang

et al. 2023

Polymer Composites

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Numerous process architectures for fabric molding are investigated because fiber braided structure is closely related to the performance of fiber‐reinforced composites. However, existing methods for calculating process architectures have to deal with the coordinates of each fiber when modeling the three‐dimensional braiding method without individually controlled switches. The amount of data grows geometrically as the number of fibers and braiding steps increases. A methodology that enables simple and efficient computation of a model of the relationship between braiding parameters and fiber structure is urgently needed. This paper proposes a novel algorithm to trace the yarn carrier trajectories through machine simulation with Euler rotation‐matrix operations. To predict the real fabric architecture, a contraction factor is introduced to optimize the yarn trajectory while considering the volume of the yarn. The optimized fabric architecture is explored and the braiding process architecture with different braiding parameters is simulated according to the algorithm. Based on the exploration of the relationship between the braiding parameters and the process structure, a hexagonal‐annular braiding machine was established, which can fabricate fabrics with different cross‐sectional shapes. The simulation results were verified by the braiding experiments.

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On the topological yarn structure of 3-D rectangular and tubular braided preforms

Cited by 90 publications

References 2 publications

Numerical prediction of the effective coefficient of thermal expansion of 3D braided C/SiC composite

Numerical prediction of the effective coefficient of thermal expansion of 3D braided C/SiC composite

On Braidability and Formability for 3D Braided Structural Shapes

A matrix computing method for visualizing switchless controlled 3D hexagonal‐annular rotary braiding process architecture

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