Tensile properties and damage evolution in a 3D C/SiC composite at cryogenic temperatures

Liu, Xiaochong; Cheng, Laifei; Zhang, Litong; Dong, Ning; Wu, Shoujun; Meng, Zhixin

doi:10.1016/j.msea.2011.06.050

Cited by 43 publications

(12 citation statements)

References 16 publications

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“…In this study, parameter D is illustrated on the tensile strength/strain curve in Fig. 7 to understand damage evolution associated with the tensile fractured process [33].…”

Section: Impact Damagementioning

confidence: 99%

An investigation of dynamic failure progress and properties of 2D C/SiC composite from 173 K to 1273 K by SHTB

Chen

et al. 2017

Composites Part B: Engineering

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Our work studies the dynamic properties of coated and uncoated 2D C/SiC composite material from 173K to 1273K by means of Split Hopkinson Tensile Bar. Examination of the failure process of the specimen by SIM D8 ultra high-speed camera and damage analysis help define the three phases of crack propagation, namely: the elastic pre-damaged phase, the yielding phase or the crack-initiating phase, and the failure phase or the phase of fast-spreading cracks. Experimental results also reveal that the dynamic tensile strength of both coated and uncoated composites decreases with the increase of temperature and decreases more conspicuously at higher temperature. An SEM is employed to examine the fracture surface and damage of C/SiC composites at different temperatures are determined by calculation. Finally, k was introduced according to the Cowper-Symonds fitting model to describe the temperature dependency. This implies a greater significance of SiC coating on the properties of the composite with the increase of temperature. Thus, it is believed that coated composite within the temperature range of 173K to 1273K displays a superior impact property compared with uncoated composite, and is a better structural thermal protection material.

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“…In this study, parameter D is illustrated on the tensile strength/strain curve in Fig. 7 to understand damage evolution associated with the tensile fractured process [33].…”

Section: Impact Damagementioning

confidence: 99%

An investigation of dynamic failure progress and properties of 2D C/SiC composite from 173 K to 1273 K by SHTB

Chen

et al. 2017

Composites Part B: Engineering

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“…2 One of the main challenges of applying nanocomposite adhesives in aerospace structural components is the extreme temperature condition (from À170 C to 2000 C) which will be encountered during their service in the tropopause and low earth orbit. 3 According to a technical report published by National Aeronautics and Space Administration (NASA), FRP composites, with adhesive bonding, will also be used for fabricating cryogenic fuel tanks for next-generation launch vehicles. However, experimental results showed that epoxy adhesive significantly degrades at cryogenic temperatures (CTs).…”

Section: Introductionmentioning

confidence: 99%

Effect of nanoclay concentration on the lap joint shear performance of nanoclay/epoxy adhesive at cryogenic condition

Lam

Zhang

Lau

et al. 2017

Journal of Composite Materials

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Nanoclay has been a popular kind of nanofiller for polymer-based nanocomposites in industries since adding a small amount of it can effectively enhance the mechanical properties of polymer. In the present study, a suitable sonication time was first found for manufacturing nanoclay/epoxy adhesive. Then, the lap joint shear strengths of nanoclay/epoxy adhesives with different nanoclay content (0, 1, 3, 5 wt%) conditioned at both room temperature and cryogenic temperature environment were investigated. The main failure mechanism of all samples was interfacial failure between the first layer of glass fiber and adhesive due to peeling. Results showed that 1 wt% was the optimal nanoclay concentration for cryogenic temperature. Scanning electron microcopy was used to examine the fracture surfaces of samples. Good exfoliation and dispersion were found in samples containing 1 wt% of nanoclay. Adding nanoclay into epoxy did not greatly affect the lap joint shear strength at room temperature but significantly influence the strength at cryogenic temperature. This was due to a clamping force induced on nanoclay by negative thermal expansion during conditioning from room temperature to cryogenic temperature. With good exfoliation and dispersion, the clamping force can be evenly distributed. Hence, 1 wt% nanoclay/epoxy adhesive is suitable for bonding composite lap joints, which will be servicing at low temperature environment.

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“…In this context, the knowledge to damage tolerance is essential. [26,27] Damage tolerance of silicon-matrix-based composite is studied by Liu et al [28] The author calculated a detectable damage at different testing conditions. It was observed that up to 100 MPa of stress, the values of 'D' are almost zero or no damage is detectable.…”

Section: Introductionmentioning

confidence: 99%

Damage tolerance behaviour of cloisite 15A incorporated recycled polypropylene nanocomposites and bionanocomposites

Naushad

Nayak

Mohanty

et al. 2016

Journal of Experimental Nanoscience

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In the present investigation, recycled polypropylene (rPP) used as a matrix was modified by incorporating nanofillers through melt blending technique to prepare a masterbatch of nanocomposites. Untreated sisal fibre and mercerised sisal fibres were further incorporated into the nanocomposites for the preparation of bionanocomposites. Bionanocomposites containing 40 wt% of UT fibre and 5 wt% of MA-g-PP revealed an increase in the tensile strength and modulus to the tune of 27% and 370%, respectively, compared to rPP. The flexural strength and modulus also increased to the tune of 129% and 269%, respectively, compared to rPP. Further, the surface treatment of the fibre slightly increased the mechanical properties and stiffness of bionanocomposites. Interfacial strength between fibre and matrix was also evaluated by using Turcsanyi and SatoÀFurukawa models. Damage tolerance of rPP nanocomposites and its bionanocomposites was evaluated using single-edge-notch specimens. The notch length 'a' to width 'W' ratios, a/W, were chosen as 0.3, 0.45 and 0.6. The nanocomposites showed better damage tolerance as compared to the rPP matrix. The corrugated structure with increased fractured surface area was observed in scanning electron microscopy. Better dispersion of clay in the nanocomposites was observed in transmission electron microscopy.

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Tensile properties and damage evolution in a 3D C/SiC composite at cryogenic temperatures

Cited by 43 publications

References 16 publications

An investigation of dynamic failure progress and properties of 2D C/SiC composite from 173 K to 1273 K by SHTB

An investigation of dynamic failure progress and properties of 2D C/SiC composite from 173 K to 1273 K by SHTB

Effect of nanoclay concentration on the lap joint shear performance of nanoclay/epoxy adhesive at cryogenic condition

Damage tolerance behaviour of cloisite 15A incorporated recycled polypropylene nanocomposites and bionanocomposites

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