Abstract
Due to the large surface/interface-to-volume ratio, surface/interface effect in nanomaterials begins to play an important role in changing the constitutive law seen in classical elasticity theory. This work investigates the size-dependent elastic field of nano-inhomogeneity due to interface and interphase effect, respectively. Closed-form solution to the elastic field of nano-inhomogeneity with interface and interphase effect is found. For comparison, the numerical result of InAs/GaAs system is provided as an example, which demonstrates that interface and interphase effect could have significant influence on the elastic field of nano-inhomogeneity. The continuity/discontinuity of the elastic field of nano-inhomogeneity with interface and interphase effect is discussed in detail. It is verified both numerically and analytically that the elastic field from interphase effect tends to converge to that from interface effect when the interphase thickness shrinks to zero. Furthermore, all results converge to the classical solution at positions far away from the interfacial region, so it is unnecessary to distinguish interface or interphase effect at positions far away from the interfacial region in practical situations.
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This work was supported by National Natural Science Foundation of China (No. 11702041) and Fundamental Research Funds for the Central Universities (No. 2018CDXYHK0016).
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Wang, M., Ye, W. Size-dependent elastic field of nano-inhomogeneity: from interface effect to interphase effect. Arch Appl Mech 90, 2319–2333 (2020). https://doi.org/10.1007/s00419-020-01722-2
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DOI: https://doi.org/10.1007/s00419-020-01722-2