The Difficulties and Measures of the Hydraulic Fracturing about Volcanic Rock Reservoir;

Finite element simulation of dynamic fracture in hydraulic fracturing;

Optimization of hydraulic fracturing technology for thin interbeds in Sha4 member of Liangll2 block;

Comparative analysis of dynamic and static breaking strength of yarns;

The chemical and physical properties of the feather fiber were evaluated with weight loss,breaking strength and breaking elongation.

The relations between breaking strength/breaking elongation and core-spun degree are analyzed.

Application of fracture mechanics to prediction of residual life of reformer tube(continued Ⅱ);

Abnormality diagnosis of crack based on fracture mechanics;

Estimating fretting fatigue life based fracture mechanics method;

Application of the borehole-to surface electric potential image technique to monitoring hydraulic fractures of coalbed methane;

Analysis of start-split characteristic of hydraulic fracture bore;

The hydraulic fracture stimulation for pilot wells located in Xinji Coal Area;

The mechanism of stress cracking and find what the key impact to this problem is researched.

The mechanical properties and stress crack properties of PC/ABS and PC/ABS/PE g MAH blends were studied.

The paper summarizes the causes of the internal stress in injected part and the influencing factors, discusses the measures to eliminate the stress crack, determines the optimum process condition by the orthoqonal method and intnxluces the heat treatment technology and the method of stress inspection.