62 Result(s)
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English
Engineering
Characterization and Evaluation of Materials
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Article
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Article
Development of viscoplastic constitutive equation through biaxial material testing
Internal-state variables have been used to represent the deformation historyin the recently proposed viscoplastic constitutive equations. In the current study, creep tests under nonproportional loadings were u...
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Viscoplastic flow due to penetration: a free boundary value problem
Under the action of a pressure gradient, a solid body B penetrates into another body. Body B is assumed to be of an incompressible, viscoplastic, Bingham material. As a first model, the problem may be treated one...
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Transition elements matching the near crack-tip strain field
New transition elements used with the collapsed triangular singular elements are constructed by using the improved isoparametric transformations. Without 1/r singular terms, the new transition elements' strain fi...
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Description of two-dimensional spallation in pure copper
A new ductile dynamic failure model, based on a porous element consisting of a single spherical void of radius a in a sphere of radius b subject to internal pressure Pg and external stress σr = − αP + (α − 1) Pg ...
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A model of plastic flow enhanced crack growth dynamics
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Optimization of the adhesive joint Iosipescu specimen for pure shear test
This paper reviews some of the difficulties encountered in achieving a uniform stress distribution within the adhesive layer of bonded Iosipescu shear test specimens. The asymptotic singular stress field at th...
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A penny-shaped crack in piezoelectrics: resolved
This paper reconsiders the problem of a penny-shaped crack in a piezoelectric medium under uniform mechanical as well as electric loadings applied at infinity (mode I). The analysis is based on the general sol...
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Three-dimensional investigation of thick single-lap bolted joints
Stresses in single-lap bolted joints of thick plates are complex and difficult to analyze. Previous studies involving stresses through the thickness of bolted joints have been limited to finite element method ...
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Modulus, Fracture Strength, and Brittle vs. Plastic Response of the Outer Shell of Arc-grown Multi-walled Carbon Nanotubes
The fracture strengths and elastic moduli of arc-grown multi-walled carbon nanotubes (MWCNTs) were measured by tensile loading inside of a scanning electron microscope (SEM). Eighteen tensile tests were perfor...
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Anti-plane problem of periodic interface cracks in a functionally graded coating-substrate structure
In this paper, the interface cracking between a functionally graded material (FGM) and an elastic substrate is analyzed under antiplane shear loads. Two crack configurations are considered, namely a FGM bonded...
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The energy reflection coefficient of electrorheological fluid with continuously changing acoustic impedance
The electrorheological fluid (ERF), among the complex fluids, is a kind of smart or intelligent material. At the presence of an external electric field, the dispersed particles in ERF suspensions can form orde...
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Optimal design approach for eco-efficient machine tool bed
An optimal design approach of machine tool bed with the aim of obtaining an eco-efficient machine structure is studied. The suggested method includes three phases. The first is the layout design optimization o...
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Mode-I crack problem for functionally graded layered structures
This paper deals with two bonded functionally graded finite strips with two collinear cracks. Different layers may have different nonhomogeneity properties in the structure. A bi-parameter exponential function...
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Study of a Video Image Fire Detection System for Protection of Large Industrial Applications and Atria
This paper presents the results of full-scale fire and environmental tests to study the use of a newly developed video image detection (VID) system for the protection of large industrial applications and atria...
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Study on the Cracking Process of Cement-Based Materials by AC Impedance Method and Ultrasonic Method
By using AC impedance spectroscopy (ACIS), this paper studied the changes of electrochemical parameters of cement paste mixed with fly ash (FA), ground blast furnace slag (GBFS) and silica fume (SF) during the...
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A fractional derivative approach to full creep regions in salt rock
Based on the definition of the constant-viscosity Abel dashpot, a new creep element, referred to as the variable-viscosity Abel dashpot, is proposed to characterize damage growth in salt rock samples during cr...
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Open AccessCorrelation Between AC Core Loss and Surface Magnetic Barkhausen Noise in Electric Motor Steel
Core loss is a significant source of energy loss in electric motor steel laminates. Therefore, there is interest in monitoring the quality and consistency of laminates at various stages of manufacturing. The p...
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A simplified hardening cohesive zone model for bondline thickness dependence on adhesive joints
In this paper, a tri-material adhesive system with nonlinear cohesive springs embedded between two elasto-plastic adhesive layers is proposed to predict the adhesive thickness effects on the fracture energy of...
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Study of the rope nonlinear creep behaviors and its influencing factors in the assembly of sheave drives
From three aspects of the stress, temperature, and time, rope creep research is often carried out based on its own ontology without various operation conditions. Thus, it is difficult to accurately reflect its...
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2-D elasticity solution of layered composite beams with viscoelastic interlayers
This paper focuses on the mechanical properties of layered composite beams with viscoelastic interlayers. The exact two-dimensional elasticity theory is used to represent the deformation of each beam layer. Th...
