50 results about "Solid mechanics" patented technology

A method of evaluating a geometric parameter of a first fracture emanating from a first wellbore penetrating a subterranean formation is provided. The method includes the steps of forming the first fracture in fluid communication with the first wellbore; forming a second fracture in fluid communication with a second wellbore; measuring a first pressure change in the second wellbore in proximity to the first wellbore; and determining the geometric parameter of the first fracture using at least the measured first pressure change in an analysis which couples a solid mechanics equation and a pressure diffusion equation.

The invention relates to a nondestructive testing method and equipment for elastic constants based on laser ultrasound. The method comprises the following steps of: focusing pulse laser light and acting the pulse laser light on an excitation point on the front surface of a material to be detected to generate ultrasonic waves; irradiating exploring laser light on a receiving point on the front surface of the material to be detected, and generating a Doppler effect and an interference phenomenon by reflected light to obtain a surface wave signal; displaying and storing a fluctuation image of thesurface wave signal changing with time by detecting a time origin of an ultrasonic signal provided by a pulsed laser signal on the surface of a sample; irradiating exploring laser light on a receiving point on the reverse side of the material to be detected, and generating a Doppler effect and an interference phenomenon by reflected light to obtain a longitudinal wave signal; displaying and storing a fluctuation image of the longitudinal wave signal changing with time; and calculating an elastic constant of the material to be detected according to a solid mechanics formula. According to the method provided by the invention, ultrasonic waves are excited by adopting laser ultrasound, so that longitudinal waves, transverse waves and surface waves can be simultaneously generated at one time,blind area-free measurement of ultrasonic waves of materials with same properties can be realized, and the precision of measuring the elastic constant is high.

The invention provides a numerical simulation analysis method for a loudspeaker falling process. The method comprises the steps of firstly building a finite element simulation model: 1) building a falling simulation geometric model containing a loudspeaker individual and concrete poured bricks; 2) setting a material model, a contact boundary condition, an initial condition, a constraint condition and a load force in a solid mechanics physical field; 3) setting material parameters; and 4) setting grid type and size, and performing grid division to generate the finite element model; and secondly solving the finite element model by adopting a transient analysis method, and performing post-processing to obtain change relationships of energy, stress, strain and displacement in the loudspeaker falling process, wherein the change relationships specifically include 1) the change relationship of total kinetic energy and total elastic strain energy of the loudspeaker along with time, 2) a distribution diagram of stress on a loudspeaker structure at a specified moment, 3) a displacement of a mass point on the loudspeaker structure at the specified moment, and 4) plastic strain capacity and distribution diagram of the loudspeaker.

In a solid mechanics simulation of a deformable object having: a model representing a condition of the deformable object; a rendering module for presenting an image of the object in response to states of the elements of the object according to an oriented view; and a user interface for a user to mechanically interact with the model to deform the modeled object; an enhancement is provided that effectively supplies a refined rendering of the set of elements of the object in view, without adding elements to the model, so that the image is of an object defined locally to a higher degree than that of the model.

The invention relates to a method for establishing a mathematical model of damage rate evolution of recycled concrete under freeze-thaw, Because of the application of damage mechanics, The freeze-thawdamage degree of recycled concrete is defined by dynamic elastic modulus, and the freeze-thaw damage experiment of recycled concrete is designed. Then the relationship model between freeze-thaw damage degree of recycled concrete and different freeze-thaw cycles is established by quick freezing method, and the damage rate evolution mathematical model of recycled concrete under freeze-thaw is obtained. Therefore, the method for establishing a mathematical model of damage rate evolution of recycled concrete under freezing and thawing is based on macroscopic damage mechanics theory, and has a solid mechanics theory foundation compared with previous research methods, and the result accords with objective law and mechanics principle, and the conclusion obtained is accurate, clear and convincing. Compared with the previous research methods, the process of the damage rate evolution mathematical model established by the invention is controllable, the period is short, and the time and the costare greatly saved.

The invention discloses a solid-liquid coupling physical similarity simulation experiment material. The solid-liquid coupling physical similarity simulation experiment material is mainly prepared fromthe following raw materials according to parts by weight: 100 parts of river sand, 8-10 parts of cement, 2-4 parts of talc powders, 2-4 parts of starch, and 2-4 parts of liquid paraffin. The invention further discloses a preparation method of the solid-liquid coupled physical analog simulation experiment material. The solid-liquid coupling physical similarity simulation experiment material disclosed by the invention has the advantages of extensive sources of the raw materials, low cost, environmental friendliness, nontoxicity, high convenience in manufacturing, high easiness in forming, quicksolidification, stable mechanical performances, high fragility and high hydrophobicity; and the proportioning ratio of the material can be adjusted to change the mechanical properties and the water-physical properties of the material, so that the properties of large-scale rocks can be simulated, the solid mechanical properties and the permeability can be simultaneously simulated, and the simulation similarity is high.

The invention discloses a measuring device for the shearing strength between an ice layer and a solid material on the basis of an experimental section of an icing wind tunnel. The measuring device comprises connecting plates arranged on the upper tunnel wall and the lower tunnel wall of the wind tunnel, wherein an experimental inner model is arranged between the two connecting plates; an experimental outer model is sheathed into the surface of the experimental inner model; the two ends of the experimental inner model are respectively of boss structures; the convex parts penetrate through through holes on the connecting plates and are fixedly connected with facilities at the outer parts of the connecting plates; and a window is arranged on the surface of the experimental outer model and faces the blowing direction of the experimental section of the wind tunnel. The measuring device disclosed by the invention has the advantages that the influence rules of different icing meteorological input conditions on the ice layer and the influence rules of the material characteristics on the adhesion characteristics of the ice layer and the solid wall surface can be realized by utilizing the icing meteorological environment of an experimental platform and the experimental section of the icing wind tunnel and combining experimental methods such as solid mechanics and fracture mechanics and the like with relevant technologies.

The invention discloses a pavement structure multi-physical field coupling numerical simulation method based on finite element, which comprises the following steps: defining mechanical, thermodynamicand hydraulic parameters; Defining vehicle loads and meteorological functions; Adding a solid mechanics module, applying a load and setting boundary conditions; Adding a porous medium heat transfer module, referring a weather function and setting boundary conditions; Adding Darcy's law module, referring a weather function and setting boundary condition; Adding a multi-physical field coupling module to couple the multi-physical fields; Calculating and performing post-processing analysis. The invention couples the stress field, the temperature field and the hydraulic field, and comprehensively studies the influence of multiple physical fields on the road performance. The invention has good guiding significance for the selection and analysis of the pavement structure.

An embodiment of a method and a program product of the invention has steps of selecting a model from a plurality of models in a model library, with at least one of the models being a constitutive model. Load data and load path data are input to the model to generate model output. The output is then displayed in a graphical format.

Methods and systems for conducting numerical simulation of structural behaviors in solid mechanics using smoothed particle Galerkin formulation are disclosed. A meshfree model representing a physical domain defined by a plurality of particles is received in a computer system. Each particle is configured for material properties of portion of the physical domain it represents. A smoothed displacement field of the physical domain subject to defined boundary condition is obtained by conducting a time-marching simulation using the meshfree model based on smoothed particle Galerkin formulation. The smoothed displacement field is derived from a set of smoothed meshfree shape functions that satisfies linear polynomial reproduction condition. The set of smoothed meshfree shape functions is constructed by convex meshfree approximation scheme and configured to avoid calculation second order derivatives. The set of smoothed meshfree shape functions is a combination of regular meshfree shape function and a displacement smoothing function for the particles.

The invention discloses a fluid finite element-based large-deformation elastomer product static stiffness calculation method. The method comprises the steps that a fluid model is built according to anoverall area obtained before and after an elastomer material of a target product deforms; the fluid model is subjected to fluid mesh generation, and parameters of the built model are given to the elastomer material in fluid units; on the basis, an initial distribution area when the elastomer material does not deform is obtained through partitioning, wherein the initial area is set to be the areawhere the elastomer material is distributed, and the other remaining area is set to be the area where the elastomer material is not distributed; after a model of the elastomer part of the product is built by means of fluid finite elements, the other part of the product is modeled according to a classical continuous solid mechanic finite element technology through the steps of contact setting, boundary condition setting and load setting, and then model building of the overall product is completed; and the displacement and the related constraint reaction of the product are calculated and jointlysolved, and then the static stiffness of the target product can be obtained. According to the method, the static stiffness of the elastomer product can be solved under any large elastomer deformationoperating condition.

The invention provides a numerical simulation analysis method for dynamic stiffness of a loudspeaker basin stand. The method comprises the steps of firstly building a finite element simulation model comprising the sub-steps of 1, adding a physical field and a research type; 2, building a geometrical model of the loudspeaker basin stand; and 3, setting the physical field; setting an elastic material model, damping, a constraint condition and a loading force in a solid mechanics physical field; 3, setting a material parameter; and 4, setting grid types and sizes, and dividing grids to generate afinite element model; then solving the finite element model by using a frequency domain analysis method; and at last, performing postprocessing to acquire a change relationship of the dynamic stiffness of the loudspeaker basin stand along with frequency. A distribution diagram of the stress, strain and displacement on the basin stand and frequency responses of the displacement amplitude, speed amplitude and acceleration amplitude of any point on the basin stand also can be acquired under the sinusoidal loading effect at any frequency.