SUBJECT

Shear

Publications on powder shear behavior, shear testing, consolidation, yield, and the interpretation of shear data for handling and process design.

PUBLICATIONS

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Explore PTI articles, Insights, Know How, and technical publications related to this subject.

  • Diagram comparing Hausner ratio, shear cell, and dynamic flow energy methods used in PBF powder flowability testing
    10 October 2026

    PBF Powder Flowability Testing: Why Different Methods Disagree and What the Results Mean

    Hausner ratio, shear cell, and dynamic flow energy results on the same PBF powder lot rarely agree exactly. That disagreement is a decision input, not proof that a method or lab got it wrong.

    Insights

  • Wood powder bridging above the outlet of a stainless-steel hopper
    3 October 2026

    Wood Powder Feeding Problems: Separating Moisture Effects From Particle Interlocking

    Wood powder can bridge because fibrous particles mechanically interlock, because moisture increases [...]

    Feature Article

  • Jenike shear cell vs ring shear tester comparison diagram for hopper design decisions
    5 September 2026

    Jenike Shear Cell vs Ring Shear Tester: Matching the Method to the Hopper or Silo Decision

    Jenike shear cells and ring shear testers measure the same yield locus through different mechanics. Here is how their sample, stress range, and time differences map onto the mass-flow versus funnel-flow hopper design decision, plus a checklist for choosing between them.

    Know How

  • Wall friction drift in hoppers, shown as clean wall flow versus film driven ratholing.
    31 January 2026

    Wall Friction Drift in Hoppers: Why Discharge Degrades Over Time

    Many hopper issues are boundary-limited. Wall friction drifts upward over time, so [...]

    Insights

  • Winter powder quality control sampling graphite to prevent flow issues during the Christmas rush
    20 December 2025

    Graphite Under the Tree

    In the Holiday rush, winter humidity shifts and faster throughput can break [...]

    Feature Article

  • Angle of repose and flowability: infographic comparing a poured cone with ring shear, wall friction, and timed discharge tests.
    1 November 2025

    Angle of Repose Is Not a Flowability Test

    The angle of repose and flowability are related, not equal. Use the [...]

    Insights

  • Laboratory ring shear tester and FT4 powder rheometer measuring powder flow test methods.
    1 October 2025

    Selecting and Comparing Powder Flow Test Methods (including PDF guides)

    No single flow test defines powder behaviour completely. Each method measures different [...]

    Know How

  • Deep-sea particle dynamics for powder engineering: marine snow with diatom chains sinking.
    13 September 2025

    Deep-Sea Particle Dynamics, Through a Powder Lens

    vDeep-sea particle dynamics show powder engineering mechanics in powder dynamics. Deep trenches [...]

    Feature Article

  • Close-up of a stainless steel shear cell testing setup in a laboratory, filled with powder, during flowability testing.
    28 June 2025

    Shear Cell Testing: The Key to Understanding and Controlling Powder Flow

    Shear cell testing is the most effective method for predicting and controlling [...]

    Feature Article

  • Selecting the right powder mixer
    6 April 2025

    Selecting the Right Powder Mixer for your blend

    There is no one-size-fits-all powder mixer—the right choice depends entirely on your [...]

    Know How

  • Exploring Viscosity in Powder Technology
    19 January 2024

    Exploring Viscosity in Powder Technology

    In the chemical industry, precision remains crucial. As a result, controlling viscosity [...]

    Feature Article

  • Dispersion in Powder Processing and Lab Testing
    11 November 2023

    Dispersion in Powder Processing and Lab Testing

    In this article we'll extensively cover Dispersion in Powder Processing and Lab [...]

    Feature Article