In the paper, the relation between average number of contacts per particle N and void ratio given e given by field was used in preference over other empirical relations, perhaps because of its linearity and hence its ease of use. However, it has been noted that the relation between mean number of contact points and void ratio is not strictly linear but curved and hence that the mean value of contact points and also its deviation are important in evaluating the fabric stability of an assembly. Therefore, the relation between N and e used in the analysis requires suitable modification. Attention is called to two equations in the paper which contradict each other (i.e., one shows x dependent on void ratio, while the other indicates void ratio e and packing arrangements have no influence on x), and further clarification is requested. The authors are asked to suggest an experimental method for confirming their calculations of angle of interparticle friction. An equation in the paper was used for random assembly of graded granular masses composed of statistically spherical particles, based on the distribution of contact angles and average number of contact points that are independent of size and and gradation of particles. However, this fails to take into account the fact that different gradings have different relationships and the relationship between the mean number of contact points and void ratio is curved for a grading.

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  • Supplemental Notes:
    • This paper is a discussion of ASCE Proceeding Paper 13157 by Sekanoor K. Sadasi van and Vegesna S. Raju.
  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  United States  10017-2398
  • Discussers:
    • Ghanekar, K D
    • Ranjan, G
  • Publication Date: 1978-7

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  • Accession Number: 00179321
  • Record Type: Publication
  • Report/Paper Numbers: ASCE 13902 Proceeding
  • Files: TRIS
  • Created Date: Sep 14 1978 12:00AM