期刊名称：Constantin Brancusi University's Annals, Letters and Social Sciences Serie
印刷版ISSN：1844-6051
出版年度：2010
期号：4
出版社：Academica Brancusi Publisher
摘要：In the case of injection molded parts, diagonal ribs commonly are used to increase bending stiffness. Predicting the improvement in twist stiffness provided by diagonal ribs is very difficult with classical hand calculations.Often designers resort to testing scale models fabricated from cardboard, wood or sheets of gluable resins such as polystyrene, PVC or ABS. While helpful, the fragile models can be expensive and time consuming to build, especially if several rib patterns and thicknesses are investigated.
