... of nanocomposite dispersion and morphology on the dynamic behavior, another nanocomposite was prepared by melt mixing of polypropylene and a modified montmorillonite (dellite) (PP dellite). The dynamic property results for PP-nanocor show an increase of both Young’s modulus and yield stress with the increasing...

... were found to be at or near to the yield stress in the container wall. A transient finite-element thermal-stress model has been developed to simulate temperature, distortion, and stress during casting and cooling in a simple slice domain of both the glass and the container. Contact thermal-stress...

...M. E. Kassner; P. Geantil; R. S. Rosen This study reports the significant ambient temperature creep plasticity at stresses below the conventional 0.2% plastic strain off-set yield stress. This is partially due to the relatively high strain-rate sensitivity of 304 stainless steel. Cold-working...

... of the central parts of steel strands subjected to latest, very high temperature rolling technologies such as integrated rolling and casting processes. Rheological models have crucial influence on the results of the computer simulation of the mentioned processes. The methodology of yield stress curves...

..., two models are used to predict strain rate dependency in hardness. The first model is a power law expression that is based on the dependence of the yield stress on the strain rate. This model is relatively simple in implementation, and it is quite easy to determine its parameters from simple uniaxial...

...-dimensional form and it applies to full density materials for which the yield/failure strength in uniaxial tension is less than or at most equal to the magnitude of that in uniaxial compression. ductile-brittle transition failure (mechanical) yield stress plastic flow elastoplasticity...

... titanium carbon fibre reinforced composites laminates foils induction heating ductility buckling yield stress brittleness fracture Composite structures are gaining widespread use in the aerospace industry because of their improved strength to weight ratios and excellent fatigue properties...

... and theoretical predictions of the residual elastic strains is represented in the form of quadratic functional, J , the minimum of which is sought in terms of the problem parameters, namely, the material yield stress, σ Y , and the radial position of the elastic-plastic boundary, c . It is shown that J shows...

... temperature M s and austenite start temperature A s , then yield stresses as a function of the prestrain were tested and predicted at a temperature above the austenite finish temperature A f . It was found that: (1) the yield stress of the composite increased with increasing the amount of prestrain; (2...

... predictions qualitatively inline with empirical knowledge. paper paper industry drying internal stresses moisture humidity heating convection shrinkage yield stress residual stress paperboard curl drying moisture gradient Paper is made by wetting and then removing water from wood...

... amplitudes below the lower yield stress, cyclic deformation consisted of an incubation stage, a significantly inhomogeneous cyclic softening stage, and a saturation stage. Inhomogeneous cyclic plasticity persisted at the saturation stage. A monotonic tension preload can eliminate the incubation stage...

... below the usual 0.2 percent offset yield stress. The evolution of stress and development of plastic strain with time are assessed through a simple analysis of springback. The microplastic processes that lead to permanent deformation of the bent beam are well characterized by a model developed...

... internal stresses density digital simulation modelling viscoplasticity cold working yield stress porous materials porosity Powder metallurgy is the process by which engineering products are manufactured from materials in powder form. For hardmetal this process involves the two steps...

... are consistent with those reported by Newman 18 for semi-elliptical surface cracks. Both the maximum reduction in ΔCTOD and the crack length at which the minimums are reached depend on the level of the applied stress relative to material’s yield stress. The results plotted in Fig. 8 ( c ) clearly show...

... response at these two length scales and therefore has to incorporate the main features of the microstructure, the mismatch in the CTE and the yield stress-temperature dependence of the phases as well as the effect of traction-free surfaces of a specimen. The results of the surface tests show a change...

... to examine the plastic deformation of the perforated sheet with non-uniform circular holes. The analytical results predicted by the theory, including those for the apparent yield stresses and strain ratios, are verified by the results obtained from the finite element analysis and also from experiments...

... approach, which is then applied to examine the plastic deformation of the perforated sheet with nonuniform circular holes. The analytical results predicted by the theory, including those for the apparent yield stresses and strain ratios, are verified by the results obtained from the finite element analysis...

... slip rotation yield stress plastic flow engineering recovery austenitic stainless steel If a metal or alloy specimen is subjected to repeated cycles of loading under stress control where the maximum stress exceeds initial yield and in the presence of a mean stress, the metal settles down...

... and the oscillation of the material wave. As for the yield stress in simple shear, a size scale dependence was found regarding two different size atomistic simulations for copper (332 atoms and 23628 atoms). We extrapolated the atomistic yield stresses to the order of a centimeter, and these comparisons were close...

...-plastic material constants on the hardness. The friction coefficient and Young’s modulus had no influence on the hardness but the inelastic materials constants, yield stress, and strain hardening coefficient and exponent, had a significant influence on the hardness. A new equation for predicting...