Dynamic modulus (sometimes complex modulus ) is the ratio of stress to strain under vibratory conditions (calculated from data obtained from either free or forced vibration tests, in shear, compression, or elongation). It is a property of materials. ,,。 ,,Maxwell,。 :,,。 ,,,、。. .
,,。 ,,Maxwell,。 :,,。 ,,,、。. .
G' > G'' : (elastic solid), (Viscous fluids)。 “X”(1), (2),。 G' < G'': 。 (,). .
(storage modulus) , 。 ,, [1] [3]。 , ,Maxwell, [1-2]。 :,, [3]。. .
σ ()=Eε (),σ,ε,E,,。 (ThomasYoung1773~1829),,。 1807,,。 (^_^) 2. E (Elastic Modulus) E (),。 ,,,,)。. .
DMA (Dynamic Mechanical Analyzer), (Storage Modulus), (Loss Modulus), (Tan delta) ()。 (Tg, Glass transition temperature)。 5, (Master curve)。 PCB: DMAPCB,、。 :. [pdf]
[FAQS about Storage modulus tangent line intersection]
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