In this paper, based on the assumptions of pure bending damage of beams, the elementary equations on bending damage are developed. Similar to the tensile damage variable defined as reduction of loading area by L.M. Kachanov,the bending damage variable is defined as reduction of moment of inertia.

In this paper,based on the basic assumptions of pure bending damage of beams,the elementary equations are drived, in which the definition of bending damage variable is defined by reduction of moment of inertia similar to that of tensile damage variable defined by reduction of loading area,a simple bending damage model is proposed similar to kachanov's tensile damage model.

Mesoscopic elements tension damage is the main reason of shaping macro-cracks. "Aggregate drawing phenomenon" and "crack surface bridge phenomenon" is observed.

An elastoplastic anisotropic damage numerical model for rock is established by adopting Mohr-Coulomb criterion as the shearing yield condition,ultimate strain as the shearing damage criterion,and maximal tensile stress as the tension damage criterion.

In this paper, the variations in Barkhausen Noise has been measured in the tension process of 09CuPTi steel. The relationship between the Barkhausen Noise intensity and tension damage (i.e residual plastic strain) of the material was obtained.

Fatigue damage is separated into two parts-static tension damage and cyclic damage. With the help of above analysis, a fatigue life estimation model is presented.

Characterization of tensile damage progress in stitched CFRP laminates

This study experimentally and numerically investigated the tensile damage progress in stitched laminates.

The primary objective of this work was an examination of the complimentary roles of tensile damage and confinement reduction (or stress relaxation) on excavation response of "hard" rockmasses.

Tensile damage and relaxation are examined with respect to structurally controlled or gravity driven failure modes as well as to strength controlled or stress driven rockmass damage and yield.

An Investigation of the Effects of Layer Architecture on Tensile Damage Mechanisms in a Silicon Carbide (SiC) Fiber-Reinforced T

The application of the anisotropic damage mechanics to composites is explored in this paper. The outline of the damage tests for laminated composites and some measurement methods are briefly presented. The experimental results of three kinds of laminates under uni-axial tension show the damage energy release rate under uniaxial tension,Y2, based on Le-maitre's hypothesis of strain equivalence can be used to describs the mechanical state of damaged laminates. The damage evolution law can be represented by the...

The application of the anisotropic damage mechanics to composites is explored in this paper. The outline of the damage tests for laminated composites and some measurement methods are briefly presented. The experimental results of three kinds of laminates under uni-axial tension show the damage energy release rate under uniaxial tension,Y2, based on Le-maitre's hypothesis of strain equivalence can be used to describs the mechanical state of damaged laminates. The damage evolution law can be represented by the simple function form of Y2=α(σ/σc)β, where α and β are coefficients which are inedpendent of the shape and size of the initial defect in laminates and can be experimentally determined. The critical damage energy release rate under uniaxial tension , Y2c, represents the capacity against the damage evolution in the laminates and it is independent of the shape and size of initial defects in laminates.

In this paper,the mechanism of fluid removal from fabrics by squeezing was investigated dynamically.Various factors which affected the results of squeezing were analysed In an all-round way.It was also found that the dynamic pressure of fluid,which increased with the process velocity of fabrics,formed the resistant moment of the rollers of mangle,and that the gradient of the seepage velocity of stretching of the fabrics processed.The methods for calculating some important parameters of fabrics (such as permeability...

In this paper,the mechanism of fluid removal from fabrics by squeezing was investigated dynamically.Various factors which affected the results of squeezing were analysed In an all-round way.It was also found that the dynamic pressure of fluid,which increased with the process velocity of fabrics,formed the resistant moment of the rollers of mangle,and that the gradient of the seepage velocity of stretching of the fabrics processed.The methods for calculating some important parameters of fabrics (such as permeability coefficients),and some proposals for lowering the take-up and lessening the fabric damage were prasented as well.

This paper dealt with tensile damage of the reinforced PTFE through detecting by acoustic emission technique and fracture analysis with scanning electron microscope. It was shown that the reinforcing component materials for the PTFE matrix had an obvious effect on their tensile properties. The microporosities formed by detaching interface between glass fibres and the matrix had little or no effect on the damage, while that formed by detaching interface between bronze powders and the matrix could initiate and...

This paper dealt with tensile damage of the reinforced PTFE through detecting by acoustic emission technique and fracture analysis with scanning electron microscope. It was shown that the reinforcing component materials for the PTFE matrix had an obvious effect on their tensile properties. The microporosities formed by detaching interface between glass fibres and the matrix had little or no effect on the damage, while that formed by detaching interface between bronze powders and the matrix could initiate and develop microcracks. The embrittlement of the reinforced PTFE would be resulted from cracking of polystyrene itself as one of the reinforcing component materials, during elastic deformation. The variations of acoustic emission signals were corresponding relatively to the different damage forms in tensile processes. So a further study on the damage of the reinforced PTFE can be done by means of acoustic emission technique.