A new scheme was presented, through which the three dimensional damage model of concrete with an known constitutive model can be established.

Employing the method of developing a three-dimensional damage model based on an established constitutive model,a three-dimensional damage model of concrete was presented by using the revised Sargin equation and Guo-Xu model in order to remove the shortages of damage model derived from Ottosen s constitutive model.

Conclusion is made that sparse setting and small transverse spacing of the dents of the new tops are better for card efficiency,consequently higher quality of slive through increasing reinforced carding plus less fiber damage and neps.

It is proposed that the fiber damage.

The types and reasons of fiber damage in blowing carding process, the influence of fiber damage on yarn quality, the method to designate potential fiber damage and some technological measures to reduce the fiber damage are discussed in this paper.

Based on the knitting process of the jersey and 1+1 rib on an flat computerized knitting machine, the influences of the different parameters (yarn input tension, cam setting, machine running velocity and take down force) on the knittability of the glass fibre yarn, specially on the loop length and glass fibre damage, were analyzed.

The effect of the knitting process on the glass-fibre damage is discussed in this paper.

According to the calculation results,the damage probability calculated by damage field theory is bigger than that of traditional method because 3-dimensional damage is taken into account in new method.