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发表于 2011-6-15 11:30:58
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来自 清华大学
3# JingheSu
Rate-dependent yield (“Rate-dependent yield,” Section 20.2.3), hysteresis (“Hysteresis in elastomers,” Section 19.8.1), and two-layer viscoplasticity (“Two-layer viscoplasticity,” Section 20.2.11) are the only time-dependent material responses that are active during a static analysis. The rate-dependent yield response is often important in rapid processes such as metal-working problems. The hysteresis model is useful in modeling the large-strain, rate-dependent response of elastomers that exhibit a pronounced hysteresis under cyclic loading. The two-layer viscoplasticity model is useful in situations where a significant time-dependent behavior as well as plasticity is observed, which for metals typically occurs at elevated temperatures. An appropriate time scale must be specified so that Abaqus/Standard can treat the rate dependence of the material responses correctly.
Static creep and swelling problems and time-domain viscoelastic models are analyzed by the quasi-static procedure (“Quasi-static analysis,” Section 6.2.5). When any of these time-dependent material models are used in a static analysis, a rate-independent elastic solution is obtained and the chosen time scale does not have an effect on the material response. For creep and swelling behavior this implies that the loading is applied instantaneously compared with the natural time scale over which creep effects take place.
只是课上听说了率相关,并没有做过,不过帮助里面这段话表明还是有关的。 |
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