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bulk modulus |
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bulk modulusNumerical constant that describes the elastic properties of a solid or fluid under pressure from all sides. It is the ratio of the tensile strength or compressive force per unit surface area to the change in volume per unit volume of the solid or fluid and thus is a measure of a substance's ability to resist deformation. Its units are newtons per square metre (N/m2). Matter that is difficult to compress has a large bulk modulus; for example, steel has a bulk modulus of 1.6 × 1011 N/m2, three times that of glass (i.e., glass is three times more compressible than steel). bulk modulus [¦bəlk ′mäj·ə·ləs] (mechanics) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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An analytical model providing simultaneous, self-consistent representations of the temperature and porosity dependence of the elastic and bulk moduli of polycrystalline ceramics is applied to data compiled from the literature for 24 oxide ceramics. A viscoelastic analysis was not attempted in the program set, because of a shortage of meaningful test data (degradation of shear and bulk moduli with time, in terms of Prony series). Cohen and his Berkeley colleague Amy Liu began using the formula to predict the bulk moduli of materials. |
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