Materials Literature
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In order to avoid the time-domain signal is too long to be loaded,the stress power spectral density simulation and experimental verification are carried out by using the transfer function theory. The Dirlik’s life prediction method is determined according to the bandwidth coefficient. Combined with the S-N curve,the f…
As a parameter characterizes the ability to resist crack propagation,fracture toughness plays an important role in evaluation of pipeline integrity. It is of both scientific and engineering significance to carry out a thorough study on its size effect.At present,the research on size effect of fracture toughness of met…
Aiming at solving the cracking problem of a light card fuel filter bracket in the vehicle road test. Firstly,each road vibration acceleration were collected,the test results show that the washboard road vibration acceleration is the largest.Secondly,the frame end was taken an exciting point and the measured frequency…
A six-point bending test that characterized the failure of the stiffener-skin interface of a stiffened composite panel at the post-buckling stage is studied. A FEM model for a stiffened panel subjected to compression and a six-point bending test model were created in Abaqus. The initial failure location,the failure mo…
In Isogeometric boundary element method（IGA-BEM）, Non-Uniform Rational B-Splines（NURBS） which are used for describing the geometric boundary in a computer-aided geometric design（CAGD） are employed as shape functions of Boundary Element Method. IGA-BEM not only can accurately describe the geometric boundary, but also u…
Bearing is one of the most critical and the most vulnerable parts of mechanical transmission system,Accurate identification of its faults is the key to achieve stable operation of equipment. The five degree of freedom dynamic model of rolling bearing system with local fault is established by considering the nonlinear…
Pursuiting cutting efficiency and surface quality during machining monocrystalline silicon can improve the quality of the wafer itself and reduce the production cost. The second-order model of variable parameter voltage,pulse on time,pulse interval,wire saw speed and process result is established by response surface m…
The size effects on the mechanical properties and defect evolution process of single crystal aluminum with a center crack under tensile loading have been simulated through molecular dynamic method. With the increase of model size, the yield stress and yield point decreased, while the fracture toughness increased. In t…
In order to study the vibration characteristics of the bolt structure of the excavator and the crawler frame, the WK-75 mechanical excavator was used as the research object, The RecerDyn multi-body dynamics simulation software was used to simulate the excavator movement process and extracted load spectrum, and Fourier…
In order to solve the problem of large deformation of the rocker arm, the virtual prototyping technology is used to soften the front and rear rocker arm, and the dynamic and mechanical model of the shearer is established. The strain gauge data of the picking sensor are obtained, and the load data is obtained by quadra…
To explore the difference of the factors influencing stress distribution for large-scale component,an automatic mechanism of acquiring stress distribution characteristics and influence knowledge was established. For the large-scale component with continuous changing geometry,a stress survey method was proposed to extr…
In order to accomplish accurate measurement for Capto shank’s key dimensions, based on analyzing Standard ISO detailedly measurement parameters were determined and measurement system for Capto shank was designed. Positioning scheme was decided according to the idea about restraining the degrees of freedom in space, ax…
Strip steel vibrations is inevitable in the rolling process of tandem mill, and the coupled model between elastoplastic body of strip steel and main drive system directly affects the overall dynamic performance of rolling mill. According to the movement mechanism of strip steel and main drive system, the main drive sy…
Hard coatings has the advantages of good wear resistance and high contact fatigue life which has been widely used in aerospace and aviation fields. However, the coating/subtrate interference will occur delamination failure under the heavy load, and the reliability of machine parts has been affected. Recently, study on…
Usually satellite is under complex dynamic load during the launch phase,it’s easy to cause satellitestructure damageto influence spacecraftmission. Mechanical environment tests show that spacecraftstructure damage always occurs because of larger acceleration response of equipment such as large mass or high center of m…
Taking the left-front door of a type of car as the study object, the method which combined multipurpose optimal method with orthogonal experimental design was applied to parameters optimization design of the thickness of the door system components. Hyperworks software was used to establish a car door finite element an…
In engineering practice,the non-linear vibration isolation systems are widely founded on the flexible foundation,and its application and research are seriously restricted to the analysis of vibration characteristic. First of all,basing on the hysteresis dry friction vibration isolation system which contains cubic nonl…
In order to study the crushing process and its influencing factors of the coal rock ploughing and planing by the plough cutters,the planing process is analyzed by numerical simulation, in view of the fact that coal and rock are heterogeneous media, coal rock images are identified, the three-dimensional model of coal r…
The empirical ridgelet transform has the ability of direction selectivity and adaptive decomposition. 2 DPCA can directly use the original image toconstruct the covariance matrix. Combined with the advantages of Empirical ridgelet transform and 2 DPCA, anidentification method ofmetal fracture based onempirical ridgele…
Aimed at the presetting problems of the roll bending force during vacuum hot rolling of Q345 R/316 L stainless steel clad plates, a three dimensional thermo-mechanical finite element model of rolling for stainless steel clad plates was proposed by using the FE software MSC.MARC. Four boundary conditions of model bendi…