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residual stress 10

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The stress relaxation of cement clinkers under high temperature

Xiufang WANG,Yiwang BAO,Xiaogen LIU,Yan QIU

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 4, Pages 413-417 doi: 10.1007/s11465-015-0357-7

Abstract: This research provides a theoretical proof for the mechanism of the stress relaxation of cement clinkersCompression stress relaxation under various high temperatures is discussed using a specially developedload cell, which can measure stress and displacement under high temperatures inside an autoclave.The cell shows that stress relaxation dramatically increases and that the remaining stress rapidly decreases

Keywords： stress relaxation high temperature cement clinker compression elastic modulus

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Hypoplastic constitutive modeling of wetting deformation of weathered rockfill materials

Erich BAUER, Zhongzhi FU, Sihong LIU,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 78-91 doi: 10.1007/s11709-010-0011-8

Abstract: The extended model takes into account the influence of the current density, the effective stress stateIn particular, triaxial compression paths and creep deformation under deviatoric stress states are considered

Keywords： rockfill dams weathered granular materials hypoplasticity solid hardness creep stress relaxation

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Deformation control criterion of shield tunnel under lateral relaxation of soft soil

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5, Pages 780-795 doi: 10.1007/s11709-023-0944-3

Abstract: Metro shield tunnels under the lateral relaxation of soil (LRS) are susceptible to significant lateralFor a shield tunnel with a diameter of approximately 6 m and under the lateral relaxation of sandy soil

Keywords： shield tunnel lateral relaxation of soil deformation control criterion of segment structure model

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Finding buckling points for nonlinear structures by dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Hossein ESTIRI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1, Pages 23-61 doi: 10.1007/s11709-019-0549-z

Abstract: Dynamic Relaxation Method (DRM) is an explicit approach for solving the simultaneous systems of equationsMixing the dynamic relaxation scheme with external work technique has not been formulated so far.In fact, the suggested load factor depends only on the Dynamic Relaxation (DR) fictitious parameters.It is shown that author’s technique is quicker than the other dynamic relaxation strategies.

Keywords： load factor external work dynamic relaxation static equilibrium path large displacement

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Nonlinear analysis of cable structures using the dynamic relaxation method

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1, Pages 253-274 doi: 10.1007/s11709-020-0639-y

Abstract: The dynamic relaxation method (DRM) is an explicit procedure for analyzing these types of structures.

Keywords： nonlinear analysis cable structure stiffness matrix dynamic relaxation method

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A fast and accurate dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1, Pages 176-189 doi: 10.1007/s11709-018-0486-2

Abstract: Dynamic relaxation method (DRM) is one of the suitable numerical procedures for nonlinear structuralBased on this formulation, a new time step is found for the viscous dynamic relaxation.

Keywords： viscous dynamic relaxation time step displacement error geometric nonlinear analysis

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Realizing complex beams via amplitude-phase digital coding metasurfaces and semidefinite relaxation optimization Research Article

武军伟1,2,3,华琼1,徐辉1,杨汉卿1,汪正兴1,程强1,崔铁军1,2,3

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 12, Pages 1708-1716 doi: 10.1631/FITEE.2300146

Abstract: Complex beams play important roles in wireless communications, radar, and satellites, and have attracted great interest in recent years. In light of this background, we present a fast and efficient approach to realize complex beams by using (SDR) optimization and amplitude-phase digital coding metasurfaces. As the application examples of this approach, complex beam patterns with cosecant, flat-top, and double shapes are designed and verified using full-wave simulations and experimental measurements. The results show excellent main lobes and low-level side lobes and demonstrate the effectiveness of the approach. Compared with previous works, this approach can solve the complex beam-forming problem more rapidly and effectively. Therefore, the approach will be of great significance in the design of beam-forming systems in wireless applications.

Keywords： Antenna beams Amplitude-phase coding metasurface Far-field synthesis Semidefinite relaxation

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EFFECTS OF TRANSPORT STRESS ON THE INTESTINES INVOLVING NEURONAL NITRIC OXIDE SYNTHASE

Frontiers of Agricultural Science and Engineering Pages 285-295 doi: 10.15302/J-FASE-2022469

Abstract:

● Transport stress declined the level of leukocytes including lymphocytes

Keywords： intestine nNOS nNOS-positive neurons transport stress

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Magnetostriction varieties and stress relief caused by pulsed magnetic field

Zhipeng CAI, Xinjie DUAN, Jian LIN, Haiyan ZHAO

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3, Pages 354-358 doi: 10.1007/s11465-011-0123-4

Abstract:

Magnetostriction is investigated to evaluate the stress relief caused by pulsed magnetic field treatment, because this physical property is closely associated with residual stress.The stress variations caused by pulsed magnetic treatment are also compared.It is found that magnetostriction variations are closely associated with stress changes.is nearly a constant during magnetic field treatment, which is valuable for stress relief evaluation

Keywords： magnetostriction pulsed magnetic field treatment stress relief

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Elastic modulus and thermal stress in coating during heat cycling with different substrate shapes

Daniel GAONA,Alfredo VALAREZO

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3, Pages 294-300 doi: 10.1007/s11465-015-0351-0

Abstract: experimental and simulated results for the 1D and 2D specimens reveals that deformation and thermal stress

Keywords： in-plane Young’s modulus curvature temperature thermal stress coating

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Parametric equations for notch stress concentration factors of rib–deck welds under bending loading

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3, Pages 595-608 doi: 10.1007/s11709-021-0720-1

Abstract: The effective notch stress approach for evaluating the fatigue strength of rib–deck welds requires notchstress concentration factors obtained from complex finite element analysis.First, we developed a model for investigating the effective notch stress in rib–deck welds.analysis to investigate the effects of multiple geometric parameters of a rib–deck weld on the notch stressThe notch stress concentration factors estimated from the developed formulas show agree well with the

Keywords： notch stress concentration factor rib–deck weld parametric analysis regression analysis parametric

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The formation mechanism and the influence factor of residual stress in machining

Zhaoxu QI,Bin LI,Liangshan XIONG

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3, Pages 265-269 doi: 10.1007/s11465-014-0311-0

Abstract: On the basis of the analytical model for residual stress, a series of simulations for residual stressorder to obtain the influences of cutting speed, depth of cut and tool edge radius on surface residual stressAnd these influences are explained from the perspective of formation mechanism of residual stress in

Keywords： residual stress analytical model strain plastic cutting parameter

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Analysis on annealing-induced stress of blind-via TSV using FEM

Jie SHAO, Tielin SHI, Li DU, Lei SU, Xiangning LU, Guanglan LIAO

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 3, Pages 401-410 doi: 10.1007/s11465-017-0457-7

Abstract: However, in TSV manufacturing, thermo-mechanical stress is induced during the annealing process, oftenTop interface stress analysis on the TSV structure shows that the curvature of via openings releasesstress concentration that leads to ~60 MPa decrease of normal stresses, Keywords： through silicon via (TSV) annealing-induced stress interface stress plastic deformation finite element

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An investigation on stress distribution effect on multi- piezoelectric energy harvesters

Hailu YANG, Dongwei CAO

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3, Pages 301-307 doi: 10.1007/s11709-017-0404-z

Abstract: The stress distribution will significantly affect the piezoelectric material performance.When the same multi piezoelectric units work together, if the stress state of the piezoelectric unitsFor uneven stress distribution, the optimal output mode is that each of the piezoelectric units rectified

Keywords： piezoelectric transducer uneven stress impedance matching optimal energy output

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Improved analytical model for residual stress prediction in orthogonal cutting

Zhaoxu QI,Bin LI,Liangshan XIONG

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3, Pages 249-256 doi: 10.1007/s11465-014-0310-1

Abstract:

The analytical model of residual stress in orthogonal cutting proposed by Jiann is an important toolfor residual stress prediction in orthogonal cutting.In application of the model, a problem of low precision of the surface residual stress prediction is, ignorance of stress constraint and cyclic loading algorithm.At last, an experiment for measuring residual stress in cutting AISI 1045 steel is conducted.

Keywords： residual stress analytical model orthogonal cutting cutting force cutting temperature