1,035 Result(s)
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Article
Elasto-plastic analysis for a finite thickness rectangular plate containing a through-thickness central crack
The objective of this work is to present a three-dimensional analysis of the elasto-plastic response of a center-cracked rectangular panel by using an alternate method, the method of lines (MOL). The problem o...
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Article
A simplification and supplement to formula KQ of ASTM E399-81 three point bending
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Article
The fracture toughness KQ of four point bending specimen
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The relation among cracks, intensity, and toughness
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Article
Analysis of a crack-tip dual zone model
An analytic model is proposed for an opening mode of crack face displacement with crack-tip dual zones, i.e. an elastic core zone plus a plastic strip zone. A presence of such dual zones in the vicinity of the...
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Article
Perturbation solution for near-tip fields of cracks growing in elastic perfectly-plastic compressible materials
With ε = 1/2 − ν (ν - Poisson's ratio) as a small parameter, perturbation expansion is made, based upon the generally accepted solution for near-tip fields of cracks growing in elastic perfectly-plastic incomp...
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Article
Determination of the ductile plastic damage variable for the annealed 30CrMnSi
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Article
Weld magnification factors for semi-elliptical surface cracks in fillet welded T-butt joint models
The weld magnification factor method has been widely used in the determination of the stress intensity factor (SIF) for weld-toe cracks in welded structural components. Weld magnification factors M ...
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Article
An iterative learning scheme for motion control of robots using neural networks: A case study
In this paper, an iterative learning controller using neural networks has been studied for the motion control of robotic manipulators. Simulations of a two-link robot have demonstrated that the proposed contro...
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Article
The study of LIGA technique at NSRL
The activity of LIGA technique was started in the fall of 1993 at National Synchrotron Radiation Laboratory (NSRL), some primary results have been obtained. Micro gearwheels were produced by deep-etch lithogra...
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Article
Nonlinear static and dynamic analysis for laminated, annular, spherical caps of moderate thickness
Based on Timoshenko-Mindlin kinematic hypothesis, the shallow shell theory is extended to include the transverse shear deformation for the nonlinear axisymmetric dynamic analysis of the symmetric cross-ply sha...
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Article
New method to evaluate fracture toughness of case-hardened steel
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Article
Effect of dual-scale microstructure on the toughness of laminar zirconia composites
Numerical study by the finite element method (FEM) is performed to investigate the effect of dual-scale microstructure on the toughness of laminar zirconia composite. The computation is based on the micromecha...
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Article
The study of LIGA technique at NSRL
The activity of LIGA technique was started in the fall of 1993 at National Synchrotron Radiation Laboratory (NSRL), some primary results have been obtained. Micro gearwheels were produced by deep-etch lithogr...
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Article
Techniques for optimization via simulation: an experimental study on an (s,S) inventory system
Various methods have been proposed to conduct optimization via discrete-event simulation. Prevalent among these are gradient-based algorithms, and more recently, so-called retrospective approaches that determi...
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Article
Optimization of discrete event systems via simultaneous perturbation stochastic approximation
We investigate the use of simultaneous perturbation stochastic approximation for the optimization of discrete-event systems via simulation. Application of stochastic approximation to simulation optimization is...
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Article
Analysis of the fiber-matrix cylindrical model with a circumferential crack
An axisymmetrical fiber-matrix cylindrical model with a circumferential crack in the matrix of finite diameter is formulated within elastostatic scope. The problem is considered by means of integral transforms...
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Article
Effects of weld strength undermatch on fracture toughness of HAZ notched weldments in a HSLA steel
In the present work the effects of weld strength undermatch on fracture toughness of heat affected zone (HAZ) have been studied. In the investigation a high strength low alloyed steel (HSLA) with 800 MPa stren...
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Article
Generation of optimal parting direction based on undercut features in injection molded parts
An algorithm has been developed for the automated recognition of undercut features for determining the optimal parting direction of injection molded parts. On the basis of the 3-D solid model of a molded part ...
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Article
Telomerase RNA and telomerase activity in trophoblastic tumors
To gain better understanding of telomerase’s possible role in the carcinogenesis of gestational trophoblastic tumors, the authors conducted RT-PCR amplification-based analysis and carried out telomeric repeat ...
