Containment tests and analysis of soft wall casing fabricated by wrapping Kevlar fabric around thin metal ring

He, Zekan; Hu, Xuan; Bai, Conger; Hu, Yanqi; Pei-hong, Cong; Bai, Hansong; Yan, Miao; Hong, Weirong

doi:10.1016/j.ast.2016.11.018

Cited by 21 publications

(8 citation statements)

References 11 publications

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“…For the PMC layer, a hybrid of polyimide fibre [14] and carbon fibre was applied. The modulus of the polyimide fibre is 120GPa, the tensile strength of dry fibre is 3.5GPa and the density is about 1.44 g/cm 3 . The carbon fibres are T800 grade with intermediate modulus.…”

Section: Materials and Manufacturingmentioning

confidence: 99%

“…It is required by aviation regulations that the casing should be able to contain the high-velocity fragments generated during fan blade-off (FBO) events [2]. As the bypass ratio continues to increase for larger thrust and higher efficiency, there have been researches in developing impact-resistant structures [3] or materials [4] so that the casing can be made thinner and lighter. Among those efforts, 3D woven composites, which have better impact resistance [5] and reinforced through-thickness properties [6], have been successfully employed for the casing of LEAP-X engines [7].…”

Section: Introductionmentioning

confidence: 99%

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Impact and quasi-static bending tests for a novel composite structure of ceramic and polymeric matrix composites

Kong

Yang

Zhang

et al. 2022

J. Phys.: Conf. Ser.

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To resolve the dilemma between impact resistance and structural stiffness of fan containment casing of modern civil aeroengines, a novel composite structure (CS) is proposed. It combines the hard and stiff ceramic which layered at the impact side and the lightweight and tough polymeric matrix composites (PMC) on the back side. The new structure was tested under ballistic impact loadings and quasi-static four-point bending. The results indicate that the impact resistance of the new structure is improved, compared with the PMC-only samples. Meanwhile, the bending stiffness of the new structure is also substantially larger at the cost of much lower bending strength.

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Section: Materials and Manufacturingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact and quasi-static bending tests for a novel composite structure of ceramic and polymeric matrix composites

Kong

Yang

Zhang

et al. 2022

J. Phys.: Conf. Ser.

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show abstract

“…현재 강도가 좋은 유리섬유 및 탄소섬유와 같은 세라믹 섬유가 이용되고 있지만, 세라믹 섬유가 가지 고 있는 취성으로 쉽게 깨질 수 있는 단점이 있다 [2,3]. 이 를 해결하기 위하여 나일론, 케블라, 노멕스 등의 고분자 섬 유가 대두되고 있다 [4]. 고분자 섬유는 고분자 체인이 전기 가 통하지 않기 때문에 절연 재료로도 많이 사용된다 [5].…”

Section: 서 론unclassified

Manufacturing and Mechanical Properties of Epoxy Fibers Spinning using Anhydride and Amine Hardeners

Shin¹,

Kim²,

Park³

et al. 2016

Composites Research

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Commonly-used polymers are manufactured as versatile forms. Furthermore, continuous polymer fibers are recently manufactured using nylon or aramid fiber. One of common epoxy was also used to make polymer fibers. Bisphenol-A type was used as base epoxy whereas amine and anhydride were used as hardeners. Epoxy fibers was cured by stepping up the temperature to maintain the shape of epoxy fiber. Surface energy was measured to confirm the degree of interfacial adhesion by modified static contact angle method. After mechanical properties were measured via fiber tensile test, the evaluation of fiber fracture was proceeded. Tensile strength of epoxy fiber using amine type hardener was higher as 138 MPa than anhydride case as 70 MPa. Fractured surface exhibited different failure patterns at the cross-section.

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“…5 Among the simulations using finite elements are the so-called explicit dynamics simulations with large deformations, which can model two or more objects that can strike each other, considering the interaction of high energy levels and strain rates, such as the impact of a car against a wall, the impact between two cars, the detachment of material in a machining process, [6][7][8][9] the deformation and fracture of tensile test pieces, [10][11][12] impact tests, [13][14][15][16][17][18] and others. In the aeronautics industry, such simulations have enabled non-destructive tests to be performed on the new aircraft engine models that have been developed, such as the blade containment test [19][20][21][22][23][24][25] and the bird strike test. [26][27][28] There are different constitutive models to predict the viscoelastic behavior of materials.…”

Section: Introductionmentioning

confidence: 99%

Dynamic numerical prediction of plasticity and damage in a turbofan blade containment test

Sepúlveda

Valle

Pincheira

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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For the light designs of new aircraft engines, constitutive plasticity and fracture models sensitive to strain rate and temperature are essential for the accurate prediction of deformations and internal stresses of the components during simulations of impact and explosion events. The work described in this article consists of the development and numerical analysis by finite elements of the blade containment test of a commercial aircraft turbofan engine, conducted to evaluate the structural integrity of the casing after being impacted by a detached fan blade. Two simulation models of the test are proposed, in which the resistance behavior of the strain rate-dependent material is described by isotropic laws of strain hardening and Johnson–Cook damage. The strength analysis is based on the numerical field results of equivalent stresses and deformations, along with the internal damage rates of the casing. The first simplified model considers half of the casing impacted by a blade at different speeds and angles of impact. The second model consists of a complete discretization of casing and rotating turbofan, with the initial detached condition of a blade simulated at different rotating speeds of the fan. The material used in this study is the Ti-6Al-4V alloy. The results analysis and advances obtained make it possible to approach an efficient computational tool with more accurate calculations to study a casing redesign with a safe reduction in mass and that fulfills the certification requirements using the blade containment test.

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Containment tests and analysis of soft wall casing fabricated by wrapping Kevlar fabric around thin metal ring

Cited by 21 publications

References 11 publications

Impact and quasi-static bending tests for a novel composite structure of ceramic and polymeric matrix composites

Impact and quasi-static bending tests for a novel composite structure of ceramic and polymeric matrix composites

Manufacturing and Mechanical Properties of Epoxy Fibers Spinning using Anhydride and Amine Hardeners

Dynamic numerical prediction of plasticity and damage in a turbofan blade containment test

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