Based on the continuous vibration equilibrium equation, the pulse function is used to present the material property, the influence of the local damage to the inherent frequency and the mode is deduced, especially the amendments function is advanced.
The current memory surface memorizes the maximum stress experienced by the material in loading history ,and indicates the hardening exent of the material ; The limit memory surface memorizes the maximum stress before destruction.
A minimum sample method is given to determine the fatigue limits of structural components based on Bayes estimation theory,the accelerated life testing theory and the similarity of S—N curve between material and components.
At that time, the polymer and plastic industry was in its nascent stage but the industry quickly grew, providing the materials for a large portion of manufactured goods.
Structural and physicochemical descriptors derived by RP-HPLC are discussed in relation to retention factors with special accent on properties of reversed-phase materials.
We used different substituted isatins as starting materials.
In this paper, a method has been established and validated for screening and identification of individual as well as total BFA by high-performance liquid chromatography and liquid chromatography/electrospray mass spectrometry in fungal raw materials.
Column packing materials are always a key factor influencing the development of high-performance liquid chromatography (HPLC).
The material presented here is a synopsis of the Ph.D thesis of the author, cf.
Numerical results of the lubrication show that the differential viscosity is the principal non-Newtonian property affecting the lubrication, it is determined by the material parameters of the lubricant and is affected by the shearing rate.
Node force and stress results of the torsion bar from last step simulation were acquired; taking into account the material characteristics and influential factors, fatigue life of the flexible body of the torsion bar was predicted.
The density, thermal conductivity, hermeticity and thermal expansion coefficients of the material are measured, and the relationship between extrusion temperature and properties is obtained.
At the same time, thermal conductivity varies between 104-140 W/(m·K); with the extrusion temperature, thermal expansion coefficient also increases but within 13 × 10-6 (at 100°C) and hermeticity of the material is high to 10-9 order of magnitude.
XPS measurements confirm that the improved electrochemical performance is most possibly attributed to a decrease in interaction between the layered material and non-aqueous electrolyte during the charge-discharge processes.
Nanometer MgO was prepared via a sol-gel auto-combustion technique using magnesium nitrate as raw material and citric acid as chelating agent.
We also propose an effective design approach of aperiodically stacked layers of nonlinear material and air in terms of the SA method.
The paraffin wax (with melting temperature of 29°C, crystallizing temperature of 26°C and latent heat of 142 J/g) served as latent heat storage material and the silica as supporting material, which prevented the leakage of the melted paraffin wax.
The models can deal with some nonlinear factors such as material and boundary condition.