For the prevention and control of low-frequency noise and vibration, the existing researches in PnC field mainly focus on passive optimization and active control. The former optimizes the model structure mainly by considering the symmetry of the structure, the selection of materials and the arrangeme...
where E is Young’s modulus, μ is Poisson’s ratio, and ρ is density, the subscripts c and m represents the ceramic and metal material, Vf is the volume fraction. The volume fraction, thus the variation of the material properties of each component can be obtained by assuming to be dif...
Its elastic properties, as demonstrated by Lee et al., include a Young’s modulus of 1 TPa and intrinsic strength of 130 GPa, representing the strongest material ever measured [11]. That the electrical properties of graphene are merely changed when it is stretched suggests a possible use for...
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From the calculation formula of mesh stiffness (Equation (11)), it is concluded that the contact stiffness (that is, OFS) is proportional to mesh stiffness, so the greater the roughness is, the smaller the gear mesh stiffness is. 5.3. Mesh Stiffness under Different Rotational Speeds The OFS...
Figure 2.Schematics of 3D seismic isolator’s motions: (a) Without loads; (b) with vertical static load; (c) with horizontal and vertical seismic loads. In this paper, the design target is established to limit the maximum vertical seismic displacement response within the static displacement of...
[19] adopted a method to check the actual thickness of each slice: a triangular shape is milled over the Pt protective layer by the FIB, and, using a simple formula, it helps in aligning the image sequence and checking the actual slice-to-slice distance. Liu also suggests the possibility...
where K is the bulk modulus, G is the shear modulus, E is the Young’s modulus, and ΔZmin is the minimum width in the direction of normal contact of adjacent units in the discrete element model [23]. Table 1. Physical and mechanical parameters of rock mass and structural surfaces. ...
According to the theory of elastic mechanics, the axial thermo-elastic deformation of the base can be calculated using the following Formula (9) [21]. ⎧⎩⎨ 𝑍b1=[𝛼1Δ𝑇−𝜁c4𝐹niπ𝑙12𝐸1−(1−𝜁c)𝑝f𝐸1]𝐵𝑍b2=[𝛼2Δ𝑇−𝜁c4𝐹niπ𝑙22...