Shear Testing, Variables that Affect Properties. Lecture 4 in our main solids flow series.
In Lecture 4, Measuring Bulk Solids Flow Properties-Shear Testing, Variables that Affect Properties, we provide a detailed discussion of the preferred method to determine a bulk solids flow properties.
Topics covered in this lecture include a discussion of direct shear testers available to use with a concentration on the Jenike Shear Tester which is the ASTM standard in the US. The test method is demonstrated by showing cohesive properties tests which allow you to predict your materials opening size to prevent arching and ratholing. As well, wall friction tests are demonstrated using several wall surfaces, which lead to determining the hopper slope required to ensure flow along your hopper walls.
Additionally, rotational testers such as Peschl and Freeman along with annular testers such as Ring Shear Tester and Brookfield are discussed.
We also discuss the variables that affect your material’s flow properties, such as: moisture content, particle size, temperature, relative humidity, and time of storage at rest. These variables play a major role in the flowability of a bulk solid. Each of them is taken into consideration when running shear tests on your product.
The online video class is given along with handouts of the presentation and a quiz that will help to ensure your complete understanding of the concepts. Upon purchase of the course you will have 3 days to view the course before your access expires.
Joseph Marinelli, the founder of Solids Handling Technologies, Inc. in Rock Hill, SC is a bulk materials handling expert who has taught hundreds of highly acclaimed engineering seminars. Since 1972, he has been active in testing bulk solids and consulting on materials handling systems design. With Jenike & Johanson, Inc., world-renowned experts on solids handling, Mr. Marinelli received his Bachelor of Science degree in Mechanical Engineering, from Northeastern University in Boston, MA.
Mr. Marinelli has also worked for manufacturers of solids handling equipment, such as feeders and silos. This background provides a unique blend of consulting and manufacturing experience to solve solids flow problems.
He lectures frequently, teaching courses on solids flow principles and flow property testing, and has authored several papers and an encyclopedia section on the subject. Since 1997, he has been involved with very popular seminars at the University of Wisconsin in the areas of bin and feeder design and solids flow property testing. He is also a columnist (“Powder Perspectives”) for the website, www.powderbulksolids.com