Effective Development of the Advanced Directional Shear Cell at Waterways Experimental Station.
Abstract
The difficulties encountered at WES in the development period were largely due to lack of radiography and of equipment for reducing stain data. There was insufficient appreciation of the need for stain distribution measurements and direct interpretation of radiographs to assess the performance of both apparatus and experimental techniques. The need was increased by the small sample size which was chosen to ease sample handling and so that undisturbed samples from the field could be tested. It is worth recalling that during the first stage of the preceding contract it was found at UCL by using radiography that acceptable uniformity of strains could not be obtained when the sample size was reduced to a 75mm cube so that the size adopted was 75mm. 100mm. 100mm. The significance of measuring strain distributions is not widely understood; those who do work in this way know that the uniformity of stain within a sample cannot be adequately measured without such data. It is frequently observed that samples with apparently uniform strains have in fact an unacceptable degree of non uniformity. The need to have accurate information on the uniformity of strains is greatest when a radically new and complex shear device is being put into service for the first time. (JES)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1988
- Accession Number
- ADA200689
Entities
People
- J. R. Arthur
Organizations
- University College London