Predicting crack initiation in composite material systems due to a thermal expansion mismatch

Folias, E. S.; Hohn, Michael H.; Nicholas, T.

doi:10.1007/978-94-017-2854-6_17

Cited by 7 publications

(6 citation statements)

References 4 publications

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“…However, some of the thermal stress could not be alleviated. In this case, residual stress forms at the SiC particle layer/filler metal interface, causing the failure of the joint under external loads [19], as shown in Figures 8(a) and 8(c). According to the analysis software measurement results, SiC volume fraction in the SiC particle layer increases as SiC concentration increases from 3 g/m 2 to 16 g/m 2 .…”

Section: Mechanical Properties Of the Jointsmentioning

confidence: 99%

Semisolid Compression Brazing of Al50Si Alloy Using Zn-Al-Cu Filler Metal Assisted by SiC Particles

Xiao

Bai

et al. 2019

Advances in Materials Science and Engineering

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Semisolid compression brazing of Al50Si alloy using Zn-Al-Cu filler metal assisted by SiC particles coating has been developed. The effects of the size and concentration of SiC particles on the microstructure and mechanical properties of the joints were studied. By using 1 μm SiC particles and the concentration of SiC particles increased to 3 g/m2, oxide film on the surface of base metal was completely disrupted and a good bonding strength was obtained. As SiC concentration further increased to 4 g/m2, colonies of SiC particle with nonwetting areas of filler metal formed at the interface, resulting in a decrease in the bonding strength. By using 5 μm SiC particles, the bonding strength was enhanced as SiC concentration increased from 1 g/m2 to 3 g/m2 due to the removal of the oxide film. By further increasing SiC concentration to 16 g/m2, the strength was constantly improved because of the dislocation strengthening effect generated at the SiC particle layer/filler metal interface. When SiC concentration increased to 32 g/m2, nonwetting area appeared inside the SiC particles layer, causing a decrease in the bonding strength.

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Section: Mechanical Properties Of the Jointsmentioning

confidence: 99%

Semisolid Compression Brazing of Al50Si Alloy Using Zn-Al-Cu Filler Metal Assisted by SiC Particles

Xiao

Bai

et al. 2019

Advances in Materials Science and Engineering

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“…Modelling of such stresses has thus been achieved for unidirectional fibre-reinforced composites of infinite length and two-dimensional solutions (generalized plane strain) can be found in the works of Mikata and Taya [3] and Anifantis et al [4]. For a finite specimen length, close-form solutions based on a more general three-dimensional approach have recently been derived by Folias et al [5] and Quek [6]. For the single fibre push-out problem, Chai and Mai [7] proposed a model of stress transfer by considering interface roughness and thermal residual stresses.…”

Section: Introductionmentioning

confidence: 97%

Characterisation of residual stresses in a single fibre composite with FBG sensor

Colpo

Humbert

Botsis

2007

Composites Science and Technology

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“…Residual stresses can have intense effects on the mechanical properties of a composite product, such as compressive and buckling strength, fracture toughness, and fatigue strength, since a ''pre-loading'' has been introduced [2]. They also have a major effect on the micro-stresses within a composite material system and must be added to the stresses induced by the external mechanical loads [3,4]. This goes against the current trend in aerospace and other industries to develop large integrated structures to reduce the expensive cost of assembling small parts.…”

Section: Introductionmentioning

confidence: 99%

Strain and Temperature Monitoring of Asymmetric Composite Laminate using FBG Hybrid Sensors

Guo

2007

Structural Health Monitoring

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Fiber Bragg grating (FBG) hybrid sensors and thermocouples measure strain and temperature simultaneously during and after cure of asymmetric cross-ply composite laminates. FBG strain sensor is used to measure strain; FBG temperature sensor and thermocouple are used to measure temperature. The characteristic matrix of the sensor is derived analytically and measurements can be done without sensor calibration experiments. A wavelength-swept fiber laser is used as the light source. Two FBG hybrid sensors and two K-type thermocouples are embedded in a carbon/epoxy asymmetric cross-ply composite laminate in different directions and different locations. The real-time measurement of fabrication strains and temperatures is performed at two points within the asymmetric composite laminate during the cure process in a hot press. Through these experiments, FBG hybrid sensors are proven to be an efficient choice for smart monitoring of composite structures.

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Predicting crack initiation in composite material systems due to a thermal expansion mismatch

Cited by 7 publications

References 4 publications

Semisolid Compression Brazing of Al50Si Alloy Using Zn-Al-Cu Filler Metal Assisted by SiC Particles

Semisolid Compression Brazing of Al50Si Alloy Using Zn-Al-Cu Filler Metal Assisted by SiC Particles

Characterisation of residual stresses in a single fibre composite with FBG sensor

Strain and Temperature Monitoring of Asymmetric Composite Laminate using FBG Hybrid Sensors

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