為探討剪切帶形成過程之形變方式與織構演化，本研究係以變形機制為滑移系統、滑移與雙晶系統主導之Taylor模型、Taylor機械雙晶模型為基礎，與剪切帶相關幾何模型結合，分別針對高、低疊差能F.C.C.金屬C(112)[11-1]單晶(Copper方位單晶)產生之Copper型、Brass型剪切帶之過程之變形織構進行模擬並與相關文獻比較討論。
Copper型剪切帶形成前之C方位單晶平面應變軋延使方位轉至D(4 4 11)[11 11 -8]方位穩定，並以D方位為起始方位應用剪切帶四種微結構幾何模型模擬剪切帶產生，不同結構模型影響晶體轉動方向，使D方位繞±TD轉動，+TD接近(112)[-1-11]而-TD至(110)[00-1]。
Brass型剪切帶形成前之C方位單晶平面應變軋延方位轉至D方位與啟動雙晶系統(111)[11-2]之雙晶方位(26 26 5)[-5 -5 52]，吻合實驗，可將整體結構轉27˚使層狀結構平行RD而使用基材方位(111)[11-2]為起始方位應用剪切帶四種微結構幾何模型模擬剪切帶產生，同樣，不同結構模型影響晶體轉動方向，部分使基材方位(111)[11-2]、雙晶方位(111)[-1-12]轉為(114)[22-1]、(110)[001]；部分則使基材方位(111)[11-2]、雙晶方位(111)[-1-12]轉為(110)[00-1]、(11-4)[221]。兩者方位的轉動符合實驗上所述{111}<112>層狀結構轉為{110}<001>與{114}<221>。

Shear band considered as important effect in deformation texture, we use Taylor-based models to investigate texture evolution of Copper and Brass-type shear band in F.C.C. C-orientation (112)[11-1] single crystal. Taylor-based models combine with plane strain condition and four geometric models to simulate texture evolution of shear bands forming at different stack fault energy.

The results indicate before Copper-type shear bands forming, C-orientation rotates to D-orientation (4 4 11)[11 11 -8]. After shear bands forming, different geometric models make D-orientation rotate around ±TD from near (112)[-1-11] to (110)[00-1] according with experiments.

The results also show before Brass-type shear bands forming, C-orientation rotates to D-orientation and Twin-orientation (26 26 5)[-5 -5 52] which is activated twin system (111)[11-2]. So it can rotate whole structure 27˚ making twin-matrix layers parallel to RD, and then use matrix orientation (111)[11-2] to next stage. After shear bands forming, some geometric models make matrix orientation (111)[11-2] and twin orientation (111)[-1-12] rotate to (114)[22-1] and (110)[001]. Another models make matrix and twin orientation rotate to (110)[00-1] and(11-4)[221]. Both of them accord with experiments describing {111}<112> transfers to {110}<001> and {114}<221>.

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