Song Guo
Huazhong University of Science and Technology
Length scaleElasticity (economics)PhysicsMathematical analysisKinetic energyEquations of motionCantileverStrain rateNonlinear systemComposite materialMicroscale chemistryBoundary value problemGalerkin methodMetallurgyGrain sizeMaterials scienceVibrationStress relaxationRitz methodRelaxation (physics)Geometrically necessary dislocationsCouple stressCyclic torsionRelaxation behaviorSize dependentMaterial propertiesTorsion (mechanics)Axial symmetryNyström methodMetalCopperMechanicsClassical mechanicsPlasticityBucklingVariational principlePartial differential equation
19Publications
10H-index
424Citations
Publications 19
Newest
#1Song Guo (HUST: Huazhong University of Science and Technology)H-Index: 10
#2Yuming He (HUST: Huazhong University of Science and Technology)H-Index: 23
Last. Shihao Han (HUST: Huazhong University of Science and Technology)H-Index: 2
view all 7 authors...
Abstract Cyclic torsion of micron-scale polycrystalline copper wires was experimentally studied. It was found that cyclic hardening is more pronounced with larger strain amplitude under symmetric cyclic straining. The mean stress relaxation is accelerated with larger initial strain and smaller strain amplitude under asymmetric cyclic straining. Meanwhile, both sample size and grain size effects were observed. That is the mean stress relaxation increases with decreasing sample size and grain size...
2 CitationsSource
#1Song Guo (HUST: Huazhong University of Science and Technology)H-Index: 10
#2Yuming He (HUST: Huazhong University of Science and Technology)H-Index: 23
Last. Shihao Han (HUST: Huazhong University of Science and Technology)H-Index: 2
view all 6 authors...
Abstract Torsional stress relaxation experiments on thin copper wires are performed. A size effect is observed. That is a faster relaxation deformation arises in a thinner wire. As the wire diameter increases, the activation volume increases but the strain rate sensitivity decreases. A greater effect of geometrically necessary dislocations on the relaxation deformation accounts for the size effect. In a thinner wire, geometrically necessary dislocations undergo fewer obstacles to reach the wire ...
3 CitationsSource
#1Zhenkun Li (HUST: Huazhong University of Science and Technology)H-Index: 10
#2Yuming He (HUST: Huazhong University of Science and Technology)H-Index: 23
Last. Dabiao Liu (HUST: Huazhong University of Science and Technology)H-Index: 20
view all 6 authors...
Abstract The nonlinear vibration of cantilever nickel microbeams with thickness in micron level is investigated through experiment and theory. A non-contact dynamic vibration measurement system is built to test the fundamental linear frequency and the nonlinear amplitude-frequency curves near the primary resonance. Experimental result reveals the nonlinear amplitude-frequency curves exhibit a marked weak softening-type behavior as well as hysteresis behavior. To elucidate the experimental observ...
10 CitationsSource
#1Zhenkun Li (HUST: Huazhong University of Science and Technology)H-Index: 10
#2Yuming He (HUST: Huazhong University of Science and Technology)H-Index: 23
Last. Dabiao Liu (HUST: Huazhong University of Science and Technology)H-Index: 20
view all 5 authors...
The superharmonic resonance (SR) of size-dependent cantilever microbeams is investigated experimentally and analytically. Nickel cantilever microbeams are employed with concentrated harmonic force ...
Source
#1Zhenkun Li (HUST: Huazhong University of Science and Technology)H-Index: 10
#2Yuming He (HUST: Huazhong University of Science and Technology)H-Index: 23
Last. Dabiao Liu (HUST: Huazhong University of Science and Technology)H-Index: 20
view all 6 authors...
A new perspective is presented to study size-dependent elasticity experimentally within micron scale utilizing dynamic approach. The size-dependent vibration of cantilever microbeams made of nickel is studied for the first three transverse modes. The normalized natural frequency of the first mode manifests strong size effect as reported. Remarkably, the normalized natural frequencies of the second and third mode also increase to 1.9 times as the thickness of microbeams decreases from 15 to 2.1 μ...
18 CitationsSource
#1Zhenkun Li (HUST: Huazhong University of Science and Technology)H-Index: 10
#2Yuming He (HUST: Huazhong University of Science and Technology)H-Index: 23
Last. Dabiao Liu (HUST: Huazhong University of Science and Technology)H-Index: 20
view all 6 authors...
The nonlinear forced vibrations of size-dependent clamped–hinged microbeams to fundamental excitations of respectively the first mode and second mode in the presence of three-to-one internal resona...
6 CitationsSource
#1Jian Lei (HUST: Huazhong University of Science and Technology)H-Index: 15
#2Yuming He (HUST: Huazhong University of Science and Technology)H-Index: 23
Last. Dabiao Liu (HUST: Huazhong University of Science and Technology)H-Index: 20
view all 5 authors...
Abstract In this work, postbuckling response of bi-directional functionally graded (FG) beams with porosities is investigated. The transverse shear deformation is taken into account based on a novel third-order shear deformation theory in which the kinematic of displacements is derived from an elastic formulation. Porosities owing to the technical issue during the preparation of functionally graded materials (FGMs) with even and uneven distributions are considered. Material properties of bi-dire...
19 CitationsSource
#1Jian LeiH-Index: 15
#2Yuming HeH-Index: 23
Last. Dabiao LiuH-Index: 20
view all 5 authors...
AbstractIn this work, the thermal effect on the buckling response of the axially functionally graded (AFG) nanobeams is studied based on the nonlocal thermoelasticity theory. Size effects of elastic deformation and heat conduction are considered simultaneously. Non-uniform distribution of temperature along the longitudinal direction of the AFG nanobeams is taken into account and determined by the nonlocal heat conductive law. Equations of motion and the corresponding boundary conditions are deri...
6 CitationsSource
#1Song Guo (HUST: Huazhong University of Science and Technology)H-Index: 10
#2Yuming He (HUST: Huazhong University of Science and Technology)H-Index: 23
Last. Dabiao Liu (HUST: Huazhong University of Science and Technology)H-Index: 20
view all 5 authors...
Abstract The tensile stress relaxation behavior of thin copper wires with diameters of 20, 35 and 50 μm is experimentally investigated at room temperature. It is revealed that the stress relaxation can occur at low starting stress below the yield strength at room temperature. Significant size and stress dependences in the stress relaxation are observed. That is at a given stress, a smaller-diameter sample exhibits a much faster stress relaxation. At a given diameter, the stress relaxation is acc...
9 CitationsSource
#1Zhenkun Li (HUST: Huazhong University of Science and Technology)H-Index: 10
#2Yuming He (HUST: Huazhong University of Science and Technology)H-Index: 23
Last. Lin Wang (HUST: Huazhong University of Science and Technology)H-Index: 61
view all 6 authors...
Abstract A standard experimental method for determining the intrinsic material length scale of modified couple stress theory is proposed based on a non-contact laser Doppler vibration measurement system. The first-order resonant frequencies of two different cantilever microbeams made of copper and titanium with thickness ranging from 15 to 2 µm are measured, respectively. The elastic size effects are obviously observed from the experimental results. The length scale parameters are obtained by fi...
58 CitationsSource