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Showing 1 to 20 of 85 for “"Stresses and strains"”.
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Characterization of Stresses and Strains Involved in the Martensitic Phase Transformations
… transformations, associated plasticity and work hardening, enhance both the strength and ductility of the material. This has enhanced both the passenger safety (improved crash-performance) and fuel efficiency as less material is consumed (lighter structure). To gain insights into these …
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An experimental investigation of the stresses and strains in iron and steel I beams
Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1891
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A general solution for the thermal stresses and strains in an infinite, hollow, case-bonded rocket grain
… to develop a general solution for the thermal stresses and strains in a hollow cylindrical case-bonded solid propellant. The heat conduction equation, as solved by Carslaw and Jaeger, was applied to a hollow composite cylinder. The temperature distribution from this equation was used in …
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Analysis of the variation of horizontal stresses and strains in bedded deposits in the eastern and Midwestern United States
… magnitude in bedded deposits in the eastern and Midwestern United States is analyzed with respect to the site depth and the rock elastic modulus using data from 40 sites. For the development of adequate regression models with the elastic modulus, zones with sufficiently uniform strains must …
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Numerical simulation of damage and progressive failures in composite laminates using the layerwise plate theory
… Layerwise Plate Theory (GLPT) of Reddy and a progressive failure algorithm. The Layerwise Theory of Reddy assumes a piecewise continuous displacement field through the thickness of the laminate and therefore has the ability to capture the interlaminar stress fields near the free edges …
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Structural Design Using Cellular Automata
… are two sets of CA rules, one used to propagate stresses and strains, and one to perform design analysis. These rules can be applied serially, periodically, or concurrently, and Jacobi or Gauss-Seidel style updating can be done. These options are compared with respect to convergence, speed, and …
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Integrated computational-experimental soil behavior characterization from direct simple shear tests on Boston Blue Clay
… are interpreted with an assumption of uniform stresses and strains within the tested soil specimen even when the specimen is known to experience non-uniform stress-strain distribution as in the Direct Simple Shear (DSS) test. Numerous tests are often needed to fully characterize a soil’s …
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The importance of extensional strains in the analysis of reinforced concrete structures
… form a whole. The common theme of Books I, III and IV is the importance of extensional stresses and strains which are usually considered to be of secondary magnitude but which under certain conditions become of primary importance in the correct analysis of building structures. Book II is …
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The quenching characteristics of sodium polyacrylate solutions.
… in water or polyalkylene glycol solutions and decreased with increasing concentration. Just after the passage of this maximum the surface heat transfer coefficient declined rapidly to reach values, at a surface temperature of about 300 C, equivalent to those recorded in the film boiling …
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Effect of non-linear loading paths on sheet metal fracture : large strain in-plane compression followed by uniaxial tension
… strength to weight ratio helps improving fuel and costs efficiency. The early ductile fracture of these materials limits their formability and crash-worthiness. A phenomenological criterion to predict ductile fracture has been developed based on a law of damage accumulation weighted by the …
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Simulations of Indentation at Continuum and Atomic levels
… constants of orthotropic, transversely isotropic and cubic materials through indentation tests on thin layers bonded to rigid substrates. Accordingly, we first use the Stroh formalism to provide an analytical solution for generalized plane strain deformations of a linear elastic anisotropic layer …
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Micromechanics-Based Analysis of Fiber-Reinforced Laminated Composites
… level, constitutive information about the fiber and the matrix phases are synthesized using a micromechanical model to yield the effective stress-strain response of a unidirectional lamina. At the top level, a three-dimensional lamination scheme is employed which assembles the laminae within a …
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Time intergration schemes for rate dependent elasto-plastic constitutive equations
… Material update procedures which have been used and analysed frequently are the Generalised Midpoint Algorithm, including the Midpoint Method, the Trapezoidal Rule and the Backward Euler Method with Radial Return. Each method displays its own advantages when applied to different input parameters …
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Finite difference approach for predicting probabilistic life of a composite cylinder subjected to thermal random loads
… cylinder with five layers, subjected to a random thermal environment is analyzed. The random thermal environment includes the ambient air temperature, solar radiation and wind speed. The location of interest is Phoenix, Arizona. The governing differential equation is the so-called …
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The effect of quenchant characteristics on the generation of thermal stress and strain in steel plates.
… was used to calculate the thermal stress and strain generated during the quenching of an infinite plate of high hardenability steel (835M30) in water, nine experimental oils and a polymer. In.the case of water, previous comparisons between experimental and calculated residual strains was …
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Numerical analysis of surface mount electronics with viscoelastic epoxy underfills and potting
… environments, it is important to understand the stresses and strains generated during manufacturing and thermal cycling in addition to dynamic loading. The large disparity in the coefficients of thermal expansion (CTE) of polymers, ceramic components, metal solders, and PCBs can generate …
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Some problems in anisotropic elasticity / Tristom Peter Cooke.
… The first problem concerns the calculation of stresses and strains within a concentric arrangement of cylindrical shells, where each shell has a differing set of anisotropic properties. This has immediate application to the design of yacht masts, and the particular example of the "Moth" yacht …
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Beam behaviour of hybrid steel sections
… potential benefits, such as savings in material and costs, existing codes of practice contain few guidelines on how to design such members. Apart from the lack of design guidelines, recommendations in many steel design codes apply only to steel grades with specified yield strength less than …
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Parameter establishment and verification of a fabrication stress model and a thermo-kinetic cure model for filament wound structures
… the capability to model the filament winding and curing processes for composite structures. The "Filament Winding Cure" (FWCURE) code is a thermo-kinetic model. FWCURE models the resin viscosity, percent of cure, temperature, resin flow, and layer location. As these characteristics change, …
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Finite element analysis of failure modes in dynamically loaded pre-cracked steel plates
… simulations are carried out to study transient stresses and strains in the pre-cracked (pre-notched) 4340 steel plates impacted by a projectile in the direction of the notch ligament. The computations employed Johnson - Cook model which takes into account strain hardening, strain-rate hardening …
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