The result shows that the gas concrete is sensible in crackle,the value of fracture toughness doesn't depend on initial crackle length,and for the large samples,the values of fracture energy and fracture toughness fits the equation K~2_(IC)=EG_F.
RFPA 2D software is applied to analyze the stress field distribution features of the loaded rock with fissures. Stress concentration factor is defined to analyze stress field intensity resulted from the fissure influence. The effect of these influence factors,such as fissure length,its mechanical parameters, on distribution of stress field is studied.
The relationship between medial crack length and normal loading was also investigated when specimens were indented by symmetrical wedges with interior angles of 30°-120°.
Crack fault quantitative diagnosis based on finite element of B-spline wavelet on the interval
The model-based forward and inverse problems in the diagnosis of structural crack faults were studied.
The forward problem is to solve the natural frequencies through a cracked structural model and the inverse problem is to quantitatively determine the crack parameters using the experimental testing frequencies.
Then, the one-dimensional crack element of B-spline wavelet on the interval (BSWI) was built to solve the forward problem.
Plane elastic problems of different media with cracks on the interface
The equilibrium problem for the infinite elastic plane consisting of two different media with many cracks on the interface is discussed.
Low pit aspiration ratio and cracks of some bordered pits are the main reasons for the increase in liquid penetration after RFVD treatment.
Initiation and propagation laws of the glass cracks in specimens subjected to normal loading under the action of symmetric wedge
To improve the machining precision of part surfaces and to facilitate tool design and cutting parameter selection, the initiation and propagation laws of glass cracks in specimens subjected to normal loading by symmetric wedges were investigated.