International Journal of Mechanics and Materials in Design
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Modelling of the mechanical response of Zr–Nb and Ti–Nb alloys in a wide temperature range
International Journal of Mechanics and Materials in Design - Tập 16 - Trang 215-224 - 2019
This article presents the results of modeling the mechanical behavior of Zr–Nb and Ti–Nb alloys in a range of strain rates from 0.001 to 1000 1/s and temperature range 297–1273 K. A modification of constitutive equations describing the mechanical response of fine-grained and coarse-grained Zr–1Nb and Ti–13Nb–13Zr alloys in a wide temperature range is proposed. It was shown that the phase transitio......
Identification of stiffness and damping characteristics of axial air-foil bearings
International Journal of Mechanics and Materials in Design - Tập 7 - Trang 231-243 - 2011
Air-foil bearings (AFBs) are self acting hydrodynamic bearings made from sheet metal foils comprised of at least two layers. The innermost “top foil” layer traps a gas pressure film that supports a load while the layer or layers underneath provide an elastic foundation. AFBs are currently used in many commercial applications, both terrestrial and in aerospace. AFBs provide a means to eliminate the......
Numerical study on load-bearing capabilities of beam-like lattice structures with three different unit cells
International Journal of Mechanics and Materials in Design - - 2018
Boussinesq problem with the surface effect based on surface energy density
International Journal of Mechanics and Materials in Design - Tập 16 - Trang 633-645 - 2019
Surface effect plays an important role in nanosized materials. In this paper, two-dimensional Boussinesq problem with the surface effect is systematically investigated based on Chen–Yao’s surface elastic theory, in which surface effect on mechanical properties of materials is considered based on the concept of surface energy density. The Fourier integral transform method is adopted to derive the c......
Finite strain numerical analysis of elastomeric bushings under multi-axial loadings: a compressible visco-hyperelastic approach
International Journal of Mechanics and Materials in Design - Tập 9 - Trang 385-399 - 2013
Elastomers have wide and ever increasing applications in several industries. In this work a compressible visco-hyperelastic approach is employed to investigate the behavior of elastomeric materials. The time-discrete form of the material model is developed to be used in numerical simulations. This formulation provides a recursive relation to update the stress in any time step regarding the deforma......
Transient response of porous inhomogeneous nanobeams due to various impulsive loads based on nonlocal strain gradient elasticity
International Journal of Mechanics and Materials in Design - Tập 16 - Trang 57-68 - 2019
Transient vibration responses of a porosity-dependent functionally graded nanobeam under different impulsive loadings have been investigated in the context of non-local strain gradient theory. Three impulse loads of rectangular-type, linear-type and sine-type have been applied to top surface of nanobeam. Two porosity distribution types known as even and uneven are discussed. Governing equations of......
A critical assessment and contact algorithm for the staggered grid material point method
International Journal of Mechanics and Materials in Design - Tập 17 - Trang 743-766 - 2021
The material point method (MPM) has demonstrated itself as an effective numerical method to simulate extreme events with large deformations. However, the original MPM suffers several defects caused by the particle quadrature, including cell crossing noise, low spatial integration accuracy, and loss of spatial convergence. Our newly developed staggered grid material point method (SGMP) employs the ......
Assessment on assorted hyper-elastic material models applied for large deformation soft finger contact problems
International Journal of Mechanics and Materials in Design - Tập 7 - Trang 299-305 - 2011
Modeling of soft finger contact mechanics is a prerequisite for gripper design. Realism of soft finger deformations depends extremely on the selection of appropriate hyper-elastic material model for soft materials. The essential criterion for a good mathematical model for hyper elasticity is its ability to match the measured strain energy curves under different deformations over a large range. Sel......
Size-dependent behaviour of electrically actuated microcantilever-based MEMS
International Journal of Mechanics and Materials in Design - Tập 12 - Trang 301-315 - 2015
In this paper, the nonlinear size-dependent static and dynamic behaviours of a microelectromechanical system under an electric excitation are investigated. A microcantilever is considered for the modelling of the deformable electrode of the MEMS. The governing equation of motion is derived based on the modified couple stress theory (MCST), a non-classical model capable of capturing small-size effe......
Consistent multiscale analysis of heterogeneous thin plates with smoothed quadratic Hermite triangular elements
International Journal of Mechanics and Materials in Design - Tập 12 - Trang 539-562 - 2015
A consistent multiscale formulation is presented for the bending analysis of heterogeneous thin plate structures containing three dimensional reinforcements with in-plane periodicity. A multiscale asymptotic expansion of the displacement field is proposed to represent the in-plane periodicity, in which the microscopic and macroscopic thickness coordinates are set to be identical. This multiscale d......
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