Design of Braided Composites for Energy Absorption

Beard, S.G.; Chang, Fu‐Kuo

doi:10.1106/089270502022858

Cited by 13 publications

(3 citation statements)

References 13 publications

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“…Delamination failure. The exponential softening law of delamination failure is used based on Beard and Chang (2002), which is given by the following equations.…”

Section: Degradation Law Of Composite Materialsmentioning

confidence: 99%

Damage and perforation resistance behaviors induced by projectile impact load on bonding-patch repaired and scarf-patch repaired composite laminates

Jiang

Zhang

Liu

et al. 2018

International Journal of Damage Mechanics

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A three-dimensional continuum damage model is proposed to analyze the damage and perforation resistance behaviors of bonding-patch and scarf-patch repaired composite laminates under projectile impact load. Coupling with modified 3D-Hashin failure criteria, a linear-exponential law due to fiber pull-out failure and an exponential law are used to predict tensile and compressive softening processes of materials, respectively. A cohesive interaction based on triangle traction–separation law and mixed-mode fracture energy method is applied for interface debonding damages between patch/lamina, patch/patch and lamina/lamina. Comparisons are made between numerical results and several available test data for different impact offsets. The perforation resistance and interface debonding damage mechanisms are extensively discussed using finite element analysis. Further, perforation resistance behaviors of laminate with six different patch-repair patterns are assessed. Effects of initial velocity of projectile on residual velocity and energy-absorption are discussed. A residual velocity error within 7.3% and energy-absorption error within 9.2% is found between simulations and tests. Consistent failure modes including fiber fracture, matrix cracking, delamination and interface debonding are also identified. As the projectile invades patches, interface debonding damage in patches is accumulated rapidly, especially for larger impact offset. The combined patch-repairs show a reduction of at the most 48.3% in velocity and higher ballistic limit velocities which implies better perforation resistance capacity. The energy-absorption almost increases with increasing the initial velocity and a decreasing trend in average energy-absorption is found with the increase of impact offset.

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“…Delamination failure. The exponential softening law of delamination failure is used based on Beard and Chang (2002), which is given by the following equations.…”

Section: Degradation Law Of Composite Materialsmentioning

confidence: 99%

Damage and perforation resistance behaviors induced by projectile impact load on bonding-patch repaired and scarf-patch repaired composite laminates

Jiang

Zhang

Liu

et al. 2018

International Journal of Damage Mechanics

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“…A promising model for tube crush was developed by Beard and Chang [18][19][20] to simulate square and circular triaxially braided tubes under quasi-static loads. This model was successful in predicting the crush performance of axisymmetric circular tubes and was also applied to square tubes.…”

Section: Problem Statementmentioning

confidence: 99%

A dynamic crash model for energy absorption in braided composite materials. Part I: Viscoplastic material model

Flesher

Chang

Janapala

2011

Journal of Composite Materials

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A dynamic crash model is developed and implemented to model the failure behavior and energy absorption of braided composite structures. Part I describes the development and theoretical foundation of a viscoplastic material model that captures the rate-dependent behavior present in braided composite materials. Part II presents the implementation of the model into a FEM program and contains experimental results for tubes crushed from quasi-static rate to 4000 mm/s rates used to verify the model. The model is presented from the mesoscale to the structural scale, starting with the constitutive model applied to composite tow segments. Tow segment response is homogenized to determine the response of the braided unit cell, while consideration for braider tow rotation and stress concentration appear at the structural level.

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“…Yarn systems move in separate controlled sinusoidal or circular paths in the braiding technique [15]. Braiding technology offers a reduced fabrication time at a relatively low cost for producing low-cost, high-volume continuous fiber composites [16,17]. There is a possibility to produce a wide range of these technical textiles with different cross-section shapes, sizes, materials, and patterns [18].…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation into the behavior of sand reinforced by tubular braided structures

Noorbakhsh

Rowshanzamir

Abtahi

et al. 2019

Journal of Industrial Textiles

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This study introduces the tubular braided structure as a new geosynthetic material for sand reinforcement. The performance of a tubular braid under the influence of similar soil–reinforcement interaction mechanisms has been investigated to emphasize the effect of the reinforcement form on the performance of the reinforced soil composite. For this purpose, three series of interaction element tests including direct shear tests, pull-out tests, and soil stress control tests were conducted on the unreinforced and reinforced sand. Finally, the overall performance of the reinforced foundation bed with the planar and tubular reinforcing textile (with similar materials, properties, texture, and areal density) was evaluated through a series of standard plate load tests. The results indicated that the performance of the sand-braid composite was better compared to the similar typical planar reinforcement, except for the case of pull-out test. Tubular braid resulted in the enhanced shear strength of the reinforced soil composites, mobilization of the excess compressive stress in the enclosed soil inside the tubular braids, reduction in the vertical stress level of the footing model transferred down through the soil bed, the increase of the average bearing capacity of the footing model, and a significant reduction in the footing settlement.

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Design of Braided Composites for Energy Absorption

Cited by 13 publications

References 13 publications

Damage and perforation resistance behaviors induced by projectile impact load on bonding-patch repaired and scarf-patch repaired composite laminates

Damage and perforation resistance behaviors induced by projectile impact load on bonding-patch repaired and scarf-patch repaired composite laminates

A dynamic crash model for energy absorption in braided composite materials. Part I: Viscoplastic material model

An experimental investigation into the behavior of sand reinforced by tubular braided structures

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