Simulation of micro-milling process is conducted using finite element method. During modeling, the Johnson-Cook's coupled thermal-mechanical model was employed as workpiece material model, the Johnson-Cook s shear failure principle was adopted as work piece failure principle, and the coupled thermal-mechanical hexahedron strain hybrid modules and adaptive grid were used to remesh the workpiece's elements. The friction between the tool and workpiece obeys the amended coulomb's law that combines with the sliding friction and the adhesive friction.

采用有限元方法對微細銑削過程進行模擬，采用Johnson-Cook熱力耦合模型作為工件材料模型A片资源特级，采用Johnson-Cook的剪切失效法則作為工件材料的失效準則快射视频欧美，采用熱力耦合平面應(yīng)變雜交單元并使用自適應(yīng)網(wǎng)格技術(shù)進行網(wǎng)格劃分，刀具與工件間的摩擦采用滑動摩擦區(qū)和粘著摩擦區(qū)相結(jié)合的修正庫侖定律欧美三级电影限制黄色福利视频。

The design of adhesive joints of non-magnetic Dewar should base on the vacuum failure.

無磁杜瓦中粘接接頭的設(shè)計應(yīng)以真空失效為主要依據(jù)插逼吃奶头69黄色视频。

Failure analysis: the generation of this fault was mainly due to customer's use of adhesive viscose trick\emdashthe performance.

故障分析：這個故障的產(chǎn)生主要是由于客戶對不干膠粘膠劑的使用性能不了解造成的。