Compressive failure analysis of unidirectional carbon/epoxy composite based on micro-mechanical models

Sun, Wei; Guan, Zhidong; Li, Zengshan; Zhang, Mi; Huang, Yueyue

doi:10.1016/j.cja.2017.10.002

Cited by 37 publications

(21 citation statements)

References 31 publications

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“…In separate studies, Tsampas et al [ 9 ] evaluated the effect of monolithic and hybrid multidirectional composites laminates on compressive performance. Through the fractography analysis, the studies showed that the hybridization via multidirectional laminates was greatly influenced by the compressive performance by showing the delamination and interlaminar fracture at the hybrid interface which was more detrimental than that at the monolithic interface [ 121 ]. It is important to note that the fracture of natural fiber composites through the microbuckling process is also influenced by the matrix stiffness in shear, which resulted from sensitivity to time, strain rate, and test condition.…”

Section: Failure Mechanism Of Natural Fiber Hybrid Compositesmentioning

confidence: 99%

A Review on Mechanical Performance of Hybrid Natural Fiber Polymer Composites for Structural Applications

et al. 2021

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In the field of hybrid natural fiber polymer composites, there has been a recent surge in research and innovation for structural applications. To expand the strengths and applications of this category of materials, significant effort was put into improving their mechanical properties. Hybridization is a designed technique for fiber-reinforced composite materials that involves combining two or more fibers of different groups within a single matrix to manipulate the desired properties. They may be made from a mix of natural and synthetic fibers, synthetic and synthetic fibers, or natural fiber and carbonaceous materials. Owing to their diverse properties, hybrid natural fiber composite materials are manufactured from a variety of materials, including rubber, elastomer, metal, ceramics, glasses, and plants, which come in composite, sandwich laminate, lattice, and segmented shapes. Hybrid composites have a wide range of uses, including in aerospace interiors, naval, civil building, industrial, and sporting goods. This study intends to provide a summary of the factors that contribute to natural fiber-reinforced polymer composites’ mechanical and structural failure as well as overview the details and developments that have been achieved with the composites.

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Section: Failure Mechanism Of Natural Fiber Hybrid Compositesmentioning

confidence: 99%

A Review on Mechanical Performance of Hybrid Natural Fiber Polymer Composites for Structural Applications

et al. 2021

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“…For the polypropylene isotropic mechanical properties were considered. Regarding the composite, the matrix was considered to be isotropic, while the anisotropic material parameters for the fiber been applied [22]. The material properties are summarized in Tables 1 and 2. A RVE with a cross section of 0.014-0.009 mm was built.…”

Section: Numerical Simulation Resultsmentioning

confidence: 99%

“…The Representative Volume Element (RVE) [22][23][24][25] is a powerful and commonly used approach for numerical modelling and elastic behaviour analysis of composite materials and general periodic structures [26][27][28][29]. Different RVE models have been developed, but in this work the Homogenization Theory was taken into account which was shown to give more accurate estimates of effective stiffness for periodic composite material [26].…”

Section: Representative Volume Element (Rve)mentioning

confidence: 99%

A Non-Destructive Method for Evaluation of the Out of Plane Elastic Modulus of Porous and Composite Materials

et al. 2019

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This paper presents an effective and reliable non-destructive method to measure the Young Modulus of porous and out of plane Young Modulus of composite materials using sound waves. First, a Finite Element Model based on Representative Volume Element (RVE) is developed to demonstrate how the elastic properties of composite material can be estimated by acoustic measurements using an impedance tube test rig. Second, the results of the experimental measurement campaign was carried out to validate the proposed method. In particular, two soft elastic foams with different density, an epoxy-carbon fibre composite and vynilesterglass fibre composite were tested. In the proposed method, a two-microphone impedance tube setup was used where the measured acoustic pressures at two upstream locations allowed the estimation of the reflection coefficient and the acoustic impedance of the tested materials. Since the acoustic impedance can be expressed as a function of the longitudinal speed of sound (assuming a plane standing wave excitation), the elastic modulus can be estimated which is associated with the speed of sound. The elastic modulus measured using the proposed method were in good agreement with the values obtained by the standard methods such as tensile tests and ultrasound time of flight measurements. The proposed method would allow in an accurate and fast manner the non-destructive evaluation of Young Modulus of porous materials and for the first time the proposed approach is applied successfully to the measurement of out of plane Young modulus of composite materials.

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“…Among all possible influence factors, fiber initial misalignment and matrix shear property are generally regarded as the two most decisive factors. 18,24,[51][52][53][54][55][56][57] This result is not hard to expect. Considering the principle and process of the kinking failure of a composite under longitudinal compression, it is reasonable to regard it as an approximate local small-angle off-axial compressive failure.…”

Section: Introductionmentioning

confidence: 94%

Failure of fiber-reinforced composite laminates under longitudinal compression

Zhou

Huang

2019

Journal of Composite Materials

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A micro-mechanics approach is put forward to predict the fiber kink inclination angle and the strength of a unidirectional composite under longitudinal compression. Internal stresses of constituent materials in the kink-band are calculated through Bridging Model; thus, only the constituent fiber and matrix properties of the composite are needed. Considering the non-uniform stress distribution caused by the embedded fiber, the homogenized stresses of the matrix are converted into true values with stress concentration factors before being used for failure analysis. The definition and application of stress concentration factors are introduced. A failure criterion based on Mohr’s theory is established to determine the orientation of potential failure surface and the failure situation of matrix, whereas a maximum normal stress failure criterion is used to detect the fiber breakage. The longitudinal compressive strength of a laminate is defined as the applied load at the moment when a failure of whichever constituent materials occurs first. The practicability and accuracy of the theory have been verified with a comparison between the predictions and the measurements obtained from the worldwide failure exercises and some other literatures.

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Compressive failure analysis of unidirectional carbon/epoxy composite based on micro-mechanical models

Cited by 37 publications

References 31 publications

A Review on Mechanical Performance of Hybrid Natural Fiber Polymer Composites for Structural Applications

A Review on Mechanical Performance of Hybrid Natural Fiber Polymer Composites for Structural Applications

A Non-Destructive Method for Evaluation of the Out of Plane Elastic Modulus of Porous and Composite Materials

Failure of fiber-reinforced composite laminates under longitudinal compression

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