Constitutive model of metal matrix composites at high strain rates and its application

Suo, Yongyong; Deng, Zhilun; Wang, Bo; Gong, Yaohua; Jia, Purong

doi:10.1016/j.mtcomm.2021.102328

Cited by 8 publications

(3 citation statements)

References 37 publications

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“…However, as deformation increased, the strain-hardening rate gradually decreased, and this trend was independent of the strain rate. There are two reasons for this phenomenon: first, although one part of the heat converted from the plastic work during loading immediately dissipated, the other part could still increase the internal temperature of the specimen, which softened the matrix to a certain extent; second, particles in the composite started to fracture as the loading continued, which weakened the strengthening effect of particles [ 21 , 31 , 32 ]. Furthermore, the curves in Figure 7 a also demonstrate that the flow stress continued to increase with deformation although the strain-hardening rate of the composite decreased as the loading continued, which indicated that the thermal softening of the matrix and the failure of particles could only partially rather than completely counteract the strain-hardening effect at room temperature.…”

Section: Resultsmentioning

confidence: 99%

High-Temperature Compressive Response of SiCp/6092Al Composites under a Wide Range of Strain Rates

Suo

Deng

et al. 2021

Materials

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The high-temperature dynamic compressive properties of a 30 vol.% SiCp/6092Al composite, fabricated using powder metallurgy, were experimentally investigated using the split Hopkinson pressure bar system with an electric furnace. Three different ambient temperatures, namely, room temperature, 200 °C, and 350 °C, were adopted, and the dynamic tests of the composite specimens were conducted at strain rates ranging from 1500 to 4500 s−1. The experimental results showed that the flow stress of the composite was generally insensitive to strain rates at room temperature. However, the composite started exhibiting different strain-rate-dependent behaviors as the temperature increased, and the flow stress nonlinearly varied with increasing temperature. In addition, the microscopic images of the specimens showed that the microscopic failure mechanisms of the composite were greatly influenced by the ambient temperature and strain rate. Specifically, the percentage of failed particles decreased with rising temperature and the dominating failure mode of particles changed significantly as the strain rate increased.

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Section: Resultsmentioning

confidence: 99%

High-Temperature Compressive Response of SiCp/6092Al Composites under a Wide Range of Strain Rates

Suo

Deng

et al. 2021

Materials

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“…These numerical methods that aimed to efficient achievement of modern compute essentially required finite element discretization of the inhomogeneous region, such as finite element modeling (FEM) 20 , Mechanics of structure genome 21,22 , Fast Fourier transforms 23 and so on. Different from the limited description of physical events of the materials by phenomenological model, the analytical approaches that provide a good reference for revealing the intrinsic properties of materials allow to correlate between the overall behavior of composites and the individual constituents, for instance, elasticity solution [24][25][26][27] , Eshelby theory 28 and energy method 29,30 , which is limited by the complex situation and boundary conditions. Morever, traditional micromechanics is designed to obtain the homogenized characterization at the smallest length scale of the materials 31 , unconsciously ignoring the scale correlation of material deformation mechanism 32,33 .…”

Section: Multiscale Simulation and Experimental Measurements Of The E...mentioning

confidence: 99%

Multiscale simulation and experimental measurements of the elastic response for constructional steel

Zhao

Huang

et al. 2022

Sci Rep

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The multiscale elastic response to the macroscopic stress was simulated to reveal the multi-scale correlation of elastic properties of the medium carbon steel. Based on the multiscale correlation constitutive equations derived from this constitutive model, the effective elastic constants (EECs) of medium carbon steel are predicted. In addition, the diffraction elastic constants (DECs) of the constituents of the medium carbon steel are also evaluated. And then, the simple in-situ X-ray diffraction experiments were performed for the measurements of DECs and EECs of treated 35CrMo steel during the four-point bending. Compared with the experimental measurements and different existing models, the results demonstrated that the developed constitutive model was in good agreement with the measured values of the EECs and DECs, and that the feasibility and reliability of the constitutive model used to simulate multiscale elastic response could reveal the correlation between the material and its constitutes.

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“…Ceramic-particle-reinforced metal matrix composites combine the characteristics of easy deformation and high thermal conductivity of metals with the characteristics of high strength and low expansion of ceramic particles [ 1 ]. They are widely applied in the fields of aerospace, automobile, and electronic packaging [ 2 , 3 ]. As one of the metal matrix composites, silicon carbide (SiC)-reinforced aluminum matrix (SiC/Al) composites possess high strength, high modulus, and enhanced temperature resistance.…”

Section: Introductionmentioning

confidence: 99%

Precise Modeling of Thermal and Strain Rate Effect on the Hardening Behavior of SiC/Al Composite

Wang

et al. 2022

Materials

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Temperature and strain rate have significant effects on the mechanical behavior of SiC/Al 2009 composites. This research aimed to precisely model the thermal and strain rate effect on the strain hardening behavior of SiC/Al composite using the artificial neural network (ANN). The mechanical behavior of SiC/Al 2009 composites in the temperature range of 298–623 K under the strain rate of 0.001–0.1 s−1 was investigated by a uniaxial tension experiment. Four conventional models were adopted to characterize the plastic flow behavior in relation to temperature, strain rate, and strain. The ANN model was also applied to characterize the flow behavior of the composite at different strain rates and temperatures. Experimental results showed that the plastic deformation behavior of SiC/Al 2009 composite possesses a coupling effect of strain, strain rate, and temperature. Comparing the prediction error of these models, all four conventional models could not provide satisfactory modeling of flow curves at different strain rates and temperatures. Compared to the four conventional models, the suggested ANN structure dramatically improved the prediction accuracy of the flow curves at different strain rates and temperatures by reducing the prediction error to a maximum of 4.0%. Therefore, the ANN model is recommended for precise modeling of the thermal and strain rate effect on the flow curves of SiC/Al composites.

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Constitutive model of metal matrix composites at high strain rates and its application

Cited by 8 publications

References 37 publications

High-Temperature Compressive Response of SiCp/6092Al Composites under a Wide Range of Strain Rates

High-Temperature Compressive Response of SiCp/6092Al Composites under a Wide Range of Strain Rates

Multiscale simulation and experimental measurements of the elastic response for constructional steel

Precise Modeling of Thermal and Strain Rate Effect on the Hardening Behavior of SiC/Al Composite

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