... load was developed. Stress, displacement, plastic deformation, and local buckling of the buried pipeline were investigated. The effects of trinitrotoluene (TNT) magnitude, pipeline diameter-thickness ratio, pipeline's buried depth, explosive depth, and explosive offset on the mechanical response...

....) on the residual strength of corroded X60 steel pipelines and equivalent stress and plastic strain distribution of the local defect area. The results show that the defect geometry exerts obvious effects on stress–strain distribution. The earliest plastic deformation occurs at the edge of the inner surface defect...

... high-pressure injection tubes of diesel engines. The parts are autofrettaged during the manufacturing process to increase operating pressure and fatigue life. The autofrettage process is affected by loading–unloading cycle. In Bauschinger effect (BE) phenomenon, plastic deformation causes a loss...

...: Elastic-perfectly plastic. 19 04 2011 22 08 2011 19 01 2012 19 01 2012 elastoplasticity plastic deformation structural engineering Limit load of a structure represents the load at the onset of unconstrained plastic flow, and determination of the load is part...

...Xianjie Yang; Sayed A. Nassar; Zhijun Wu; Aidong Meng The nonlinear plastic deformation behavior of a clamped bolted joint model under a separating service load is investigated using analytical, finite element, and experimental techniques. An elastic-plastic model is used for the bolt material...

... confirm the applicability of this procedure to complex 3-D structures. 05 05 2011 04 07 2011 01 12 2011 01 12 2011 fatigue cracks pipelines plastic deformation plasticity shakedown ratchet limit linear matching method defective pipeline In the analysis...

... deformation pressure vessels yield stress plasticity finite element analysis tangent modulus stiffness eigenvalues computational path Plastic deformation is an important issue in the structural integrity of pressure vessels, especially near stress concentrations. Finite element...

... of a global plastic collapse or gross plastic deformation during the specified life of the vessel. Cyclic analysis based on a strain hardening material model indicates that the vessel will adapt to plastic shakedown after 6 load cycles. This indicates that the stress categorization and linearization...

..., to formulate guidelines to predict the limiting parameters for this unique mode of failure. Test results have indicated that the tested pipes were found to be very ductile and had exhibited significant plastic deformation up to a certain stage of load-deformation history. The maximum longitudinal...

... 08 08 2009 12 04 2010 15 10 2010 15 10 2010 elasticity fatigue life testing maximum likelihood estimation plastic deformation pressure vessels regression analysis Weibull distribution When local yielding is involved, the stress-based approach is not appropriate...

... (a more detailed description of the first autofrettage process is presented in Ref. 7 ). The region O-A defines the initial tensile linear elastic loading, and point A defines the incipient onset of the plastic deformation. Tensile plasticity continues over the A-C1-C2 range up to the maximum strain...

... accuracy of experiment equipments that are available now encourages adopting more accurate material models. Horne , M. R. , and Merchant , W. , 1965 , The Stability of Frames , Maxwell , London . Hwan , C. L. , 1992 , “ Large Plastic Deformation by Sequential Limit...

... 07 2010 elasticity fatigue finite element analysis internal stresses plastic deformation plates (structures) shakedown ratchet limit stable cyclic state linear matching method Many advanced technologies rely upon equipment or apparatus operating under mechanical loading...

... utilizing the formulation of rigid plastic deformation for describing and quantifying the developing “creep exhaustion.” 13 08 2008 10 06 2009 13 10 2009 alloy steel creep design engineering finite element analysis mixing nozzles plastic deformation pressure vessels shapes...

... 8d σ 2 = p r 2 t The Lévy–Mises equations ( 25 26 27 ), which relate the principal components of strain increments during plastic deformation to the principal applied stresses in isotropic materials: 9a d ε 1 σ 1 − 0.5 ( σ 2 + σ 3...

... of the welded seam on the inner wall of the tube. In the fracture zone, the fracture face is at an angle of 45 deg to the tube wall face and the explicit plastic deformation is present. The analysis, by electronic energy spectrum, shows that there exist many fatigue striations in the fracture face. A 3D finite...

... and also one factor of reliability. Many structures have nonlinear characteristics. Hysteresis loop characteristic caused by plastic deformation is one of the most common nonlinear characteristics observed in pressure vessels and piping systems. In this paper, an estimation method for the first excursion...

... pressure of 1 bar. In Ref. 3 , DDT was observed during flame acceleration tests in pure ethylene oxide, and they computed that the peak pressure could have been as high as 140 times the initial pressure due to precompression. For pressure vessels or tubes in the plastic deformation regime...

... element method. A modified rate-temperature parameter was defined by accounting for the effect of the temperature rise under rapid plastic deformation, and it was applied to the fully coupled analysis between the heat conduction and thermal elastic-plastic behavior. The temperature rise and stress-strain...

... Multiaxial Fatigue Criteria ,” Int. J. Fatigue 0142-1123 10.1016/j.ijfatigue.2006.10.028 , 29 , pp. 1490 – 1502 . Jiang , Y. , 2001 , “ An Experimental Study of Inhomogeneous Cyclic Plastic Deformation ,” ASME J. Eng. Mater. Technol. 0094-4289 10.1115/1.1373652 , 123 , pp. 274 – 280...