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FE Analysis of the Drop-weight Impact on 3D Orthogonal Woven Fabric Reinforced Composite.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	FE Analysis of the Drop-weight Impact on 3D Orthogonal Woven Fabric Reinforced Composite./
作者:	Xu, Wang.
面頁冊數:	1 online resource (371 pages)
附註:	Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
Contained By:	Dissertations Abstracts International84-11B.
標題:	Metals. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30400551click for full text (PQDT)
ISBN:	9798379471866

FE Analysis of the Drop-weight Impact on 3D Orthogonal Woven Fabric Reinforced Composite.
Xu, Wang.

FE Analysis of the Drop-weight Impact on 3D Orthogonal Woven Fabric Reinforced Composite. - 1 online resource (371 pages)

Source: Dissertations Abstracts International, Volume: 84-11, Section: B.

Thesis (Ph.D.)--North Carolina State University, 2023.

Includes bibliographical references

Fiber-reinforced composites are being utilized in a variety of applications, including ballistic protection, aerospace, and vehicles. When compared to prepreg composites, woven reinforcements have several advantages, including lower manufacturing costs and higher structural integrity. Mechanical parameters of the reinforcement, which depend on fiber type, weaving density, weaving pattern, and other structural properties, influence the mechanical properties of woven composites. Traditional 2D woven fabrics are composed of two sets of strands that are perpendicular to one another. The innovation of 3D orthogonal woven fabrics (3DOW) brings a new set of yarn that travels in the through-thickness direction, which substantially enhanced the out-of-plane properties and consequently provides delamination resistance to 3D woven composites.The experimental results indicated that increasing structural parameters, such as the density of the weft yarn and the number of layers, can improve the performance of 3DOW composites under impact by changing the amount of fiber. Due to a lack of systematic studies, it is not clear how these structural characteristics affect the impact resistance of 3DOW. In this work, the impact performance of 3DOW under low-velocity impact is investigated using the finite element method since it allows the researchers to include more details that are difficult to capture through testing, such as strain wave propagation. In this investigation, meso-level E-glass 3DOW composite models were created to study the influence of varying weft yarn density, number of layers, and binder path on the impact resistance of 3DOW. The FE modeling findings were validated with their experimental counterparts' results in terms of energy absorption, load-time curves, and morphological comparison, and this successfully validated the model.On the basis of this validated model, the energy distribution, back face deformation, and stress distribution in 3DOW models with varied structural properties were specifically examined. It was discovered that an increase in X-yarn density enhances not only the internal energy (IE) of X-yarns but also the IE absorption in the warp primary yarns. The results also revealed that the difference between pick densities of 4.87 and 5.45 picks/cm is much greater than the difference achieved by raising the X-yarn density from 5.45 to 5.87 picks/cm. In all yarns, the 3DOW with twill binder absorbed somewhat less energy than the simple variant. Due to the lack of interlacing between the binder yarn and the top weft yarn in the basket weave, the side weft yarn slipped off after the impact, resulting in much less IE absorption in the weft primary yarns. Additional research on the fracture of primary yarns showed that an increase in X-yarn density delayed the fracture time of primary yarns in the bottom layer of 2-layer 3DOW and the middle and bottom layers of 3- and 4- layer 3DOW. which contributes to enhanced IE absorption.The investigation of stress distribution along the primary yarn before fracture revealed that models with greater X-yarn density had less stress concentration in the primary yarn. With increased Xyarn density, the back face of matrix resin exhibited less concentrated stress, as the reinforcement took more stress. The shape of the rear face deformation is less rounded in models with more Xyarn density because greater X-yarn density results in a greater area deformed along near the Xedge yarns in the warp direction. With increasing X-yarn density, the highly deformed area at the impact center decreased while the total deformation area increased. The twill and basket weave additionally enhanced areas of back face deformation because the two continuous intersections between binder yarn and weft yarn in these two weaves resulted in more X-yarn deformation.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798379471866Subjects--Topical Terms:

601053
Metals.
Index Terms--Genre/Form:

542853
Electronic books.

FE Analysis of the Drop-weight Impact on 3D Orthogonal Woven Fabric Reinforced Composite.
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245 1 0 $a FE Analysis of the Drop-weight Impact on 3D Orthogonal Woven Fabric Reinforced Composite.
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500 $a Source: Dissertations Abstracts International, Volume: 84-11, Section: B.
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502 $a Thesis (Ph.D.)--North Carolina State University, 2023.
504 $a Includes bibliographical references
520 $a Fiber-reinforced composites are being utilized in a variety of applications, including ballistic protection, aerospace, and vehicles. When compared to prepreg composites, woven reinforcements have several advantages, including lower manufacturing costs and higher structural integrity. Mechanical parameters of the reinforcement, which depend on fiber type, weaving density, weaving pattern, and other structural properties, influence the mechanical properties of woven composites. Traditional 2D woven fabrics are composed of two sets of strands that are perpendicular to one another. The innovation of 3D orthogonal woven fabrics (3DOW) brings a new set of yarn that travels in the through-thickness direction, which substantially enhanced the out-of-plane properties and consequently provides delamination resistance to 3D woven composites.The experimental results indicated that increasing structural parameters, such as the density of the weft yarn and the number of layers, can improve the performance of 3DOW composites under impact by changing the amount of fiber. Due to a lack of systematic studies, it is not clear how these structural characteristics affect the impact resistance of 3DOW. In this work, the impact performance of 3DOW under low-velocity impact is investigated using the finite element method since it allows the researchers to include more details that are difficult to capture through testing, such as strain wave propagation. In this investigation, meso-level E-glass 3DOW composite models were created to study the influence of varying weft yarn density, number of layers, and binder path on the impact resistance of 3DOW. The FE modeling findings were validated with their experimental counterparts' results in terms of energy absorption, load-time curves, and morphological comparison, and this successfully validated the model.On the basis of this validated model, the energy distribution, back face deformation, and stress distribution in 3DOW models with varied structural properties were specifically examined. It was discovered that an increase in X-yarn density enhances not only the internal energy (IE) of X-yarns but also the IE absorption in the warp primary yarns. The results also revealed that the difference between pick densities of 4.87 and 5.45 picks/cm is much greater than the difference achieved by raising the X-yarn density from 5.45 to 5.87 picks/cm. In all yarns, the 3DOW with twill binder absorbed somewhat less energy than the simple variant. Due to the lack of interlacing between the binder yarn and the top weft yarn in the basket weave, the side weft yarn slipped off after the impact, resulting in much less IE absorption in the weft primary yarns. Additional research on the fracture of primary yarns showed that an increase in X-yarn density delayed the fracture time of primary yarns in the bottom layer of 2-layer 3DOW and the middle and bottom layers of 3- and 4- layer 3DOW. which contributes to enhanced IE absorption.The investigation of stress distribution along the primary yarn before fracture revealed that models with greater X-yarn density had less stress concentration in the primary yarn. With increased Xyarn density, the back face of matrix resin exhibited less concentrated stress, as the reinforcement took more stress. The shape of the rear face deformation is less rounded in models with more Xyarn density because greater X-yarn density results in a greater area deformed along near the Xedge yarns in the warp direction. With increasing X-yarn density, the highly deformed area at the impact center decreased while the total deformation area increased. The twill and basket weave additionally enhanced areas of back face deformation because the two continuous intersections between binder yarn and weft yarn in these two weaves resulted in more X-yarn deformation.
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650 4 $a Tension tests. $3 3689348
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650 4 $a Textiles. $3 3559975
650 4 $a Aerospace engineering. $3 1002622
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650 4 $a Mechanics. $3 525881
650 4 $a Polymer chemistry. $3 3173488
650 4 $a Textile research. $3 2153103
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