Existence of Triple Positive Solutions of a Kind of Second-order Four-point Boundary Value Problem;

Interracial fracture properties of the stainless steel and aluminum bimetal are analyzed with the method of four point bending test,and the interface crack and the interface fracture structure are analyzed with SEM.

A new method for elastic modulus measurement of thin films—four point bending method is presented in this paper.

Optimization design of integral fracturing parameters for four-spot well pattern with horizontal fractures;

Different from the common 4-point method for separating the form error motion of the workpiece from the motion error of the axis of rotation.

In this paper, the other two new methods estimating K value of the Logistic curve equation, 4-point method and yielding point method were put forward.

According to mathematical meaning of model,yielding point method gives best evaluation in the case of settlement time-trend prediction,3-point method has similar effect with 4-point method;however,the two are not better.

With the aid of the analytical methods of composite mechanics,a layered shear-lag model is established to investigate the multiple cracking of reinforced concrete(RC) beam reinforced with carbon fiber sheets under four-point bending.

Based on the study method for mechanics of composite materials,a layering model is established for the redistribution of the stress of reinforced concrete beam strengthened by unidirectional aramid fiber sheet with crack under four-point bending load,and then the distributions of stress and displacement of all the sub-layers are obtained.

In order to solve these problems,a four-point bending fatigue test system Cooper NU-14 was used to evaluate the fatigue performance of asphalt mixtures.