摘要
In this paper,the failure features of strip tensile specimen were observed and analysed for need-le-punched non-woven geotextiles.A mechanical model which expresses the relation between thetensile modulus,the strip specimen size,contraction factor and the tensile strength of non-wovenfabric was derived.The theoretical prediction showed that the main factor influencing tensilestrength of non-woven geotextile specimens with different size is the contraction factor of specimenor the specimen aspect ratio(width/length).The larger the aspect ratio,the higher the tensilestrength test value of geotextiles,but the experiments showed that the specimen tensile strength isnot increased with increasing the width of specimen.The reason was discussed and it seemed thatthe deviation could be served as an indication of the degree of imperfectness of the non-wovenstructure.
In this paper,the failure features of strip tensile specimen were observed and analysed for need- le-punched non-woven geotextiles.A mechanical model which expresses the relation between the tensile modulus,the strip specimen size,contraction factor and the tensile strength of non-woven fabric was derived.The theoretical prediction showed that the main factor influencing tensile strength of non-woven geotextile specimens with different size is the contraction factor of specimen or the specimen aspect ratio(width/length).The larger the aspect ratio,the higher the tensile strength test value of geotextiles,but the experiments showed that the specimen tensile strength is not increased with increasing the width of specimen.The reason was discussed and it seemed that the deviation could be served as an indication of the degree of imperfectness of the non-woven structure.
