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文章运用ABAQUS对扁壳结构在集中荷载作用下受压屈曲问题进行了分析,应用弧长法进行了迭代求解,并应用Risk法顺利的解决了扁壳屈曲的复杂非线性大变形问题,加深了扁壳结构非线性问题的理解与分析,为扁壳结构在工程领域中的应用提供了借鉴。 相似文献
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K. Y. Lee 《International Journal of Automotive Technology》2008,9(1):87-93
The microstructural changes and the tensile properties of TRIP-assisted steels resulting from different chemical compositions
were investigated by using SEM, TEM, XRD and UTM. As a result of microscopic observation, the morphology of retained austenite
could be characterized by two types: a granular type in steel containing higher Si and a film type in steel having higher
C. In the case of the steel containing higher C with a tensile strength of 860 MPa and a total elongation of 38%, the film
type retained austenite could be observed among the lath bainitic ferrites. Actually, the metastable retained austenite was
required for good formability, which means that the chemical composition plays a significant role in the microstructure and
tensile property of TRIP-assisted steel. With respect to the tensile property, each steel type that contained an suitable
amount of Si and Mn demonstrated a typical TRIP effect on a stress-strain curve while steel that contained a higher Mn content
exhibited similar behaviors, as demonstrated in the dual phase steels. 相似文献
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