関連する実験動画

Updated: Jul 12, 2026

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
10:36

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction

Published on: May 20, 2018

アグリストバライトの弾性:マイナスポッソンの比率を持つ二酸化シリコン

A Yeganeh-Haeri, D J Weidner, J B Parise

    Science (New York, N.Y.)
    |July 31, 1992
    PubMed
    まとめ

    アルファ・クリストバライト構造の二酸化シリコン (SiO(2) は,希少なマイナスのポアソン値を示している.

    さらに関連する動画

    Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples10:12

    Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples

    Published on: June 19, 2018

    Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope11:14

    Comprehensive Characterization of Extended Defects in Semiconductor Materials by a Scanning Electron Microscope

    Published on: May 28, 2016

    関連する概念動画

    Poisson's Ratio01:23

    Poisson's Ratio

    Poisson's ratio is a material property that indicates their stress response. It explains the connection between the elongation or compression a material undergoes in the direction of an applied force and the contraction or expansion it experiences perpendicular to that force. When a slender bar is loaded axially, it stretches in the direction of the force and contracts laterally. Poisson's ratio is the negative ratio of this lateral contraction to the axial elongation. The negative sign ensures...
    Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

    Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

    Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
    Specific Gravity of Aggregate01:19

    Specific Gravity of Aggregate

    Aggregates typically contain pores, which can be either permeable or impermeable. Considering the pores in the aggregates, the specific gravity of aggregates is defined in three different forms, namely, bulk or gross specific gravity, apparent specific gravity, and absolute specific gravity.
    Bulk or gross specific gravity is calculated by taking the ratio of the mass of aggregates in the saturated surface-dry state to the total volume that includes both the solids and the voids within the...
    Elastic Strain Energy for Normal Stresses01:22

    Elastic Strain Energy for Normal Stresses

    Strain energy quantifies the energy stored within a material due to deformation under loading conditions, a fundamental concept in materials science and engineering. The strain energy can be modeled when a material is subjected to axial loading with uniformly distributed stress. In this scenario, the stress experienced by the material is the internal force divided by the cross-sectional area, and the strain induced is directly proportional to this stress through the modulus of elasticity.
    If...
    Elasticity in Concrete01:20

    Elasticity in Concrete

    Upon subjecting concrete to moderate or high uniaxial compressive or tensile stresses, the strain response is non-linear relative to the stress applied. As the stress is removed, the resulting stress-strain curve deviates from the original path traced during loading, creating a hysteresis loop, indicative of the concrete's non-linear and non-elastic properties. Typically, a material's modulus of elasticity, which is a measure of the material's stiffness, is inferred from the linear portion of...
    Aggregate Cement Ratio01:21

    Aggregate Cement Ratio

    The Aggregate Cement ratio refers to the weight of aggregate divided by the weight of cement in a concrete mix. Altering this ratio has profound effects on the concrete's properties. This ratio plays a pivotal role in determining the strength, workability, and durability of concrete. When the Aggregate Cement ratio is higher, the mix is leaner, meaning it has less cement paste to lubricate the aggregate, potentially making the concrete less workable. Such mixes, known as lean, enhance the...