ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

Flexibility and accuracy are two key factors that determine the performance of compliant joints, and also directly affect the application of compliant mechanisms. In fact, the two factors are mutually restricted. In order to improve the axial stiffness and rotation accuracy while maintaining good bending performance of joints in lamina emergent mechanisms (LEMs), a new type compliant joint based on the structure of lamina emergent torsional (LET) joint was proposed, and its structure was designed, named as Nested-LET. The close-form model of the Nested-LET was given, and the equivalent stiffness of bending and tensile-compressive was derived. The modified coefficients were presented to optimize the results, respectively. Comparing the result of theoretical calculation with finite element analysis (FEA), the theoretical formulas and modified coefficients were verified. Comparisons between the Nested-LET and outside LET joints with the same overall dimensions were made. The FEA results showed that bending stiffness of Nested-LET joint was 1.5 times larger, but tensilecompressive stiffness was increased by 30 times, and centershift was reduced by 13%. Two corresponding joints were made of beryllium bronze material. Through the antitensile test, it can be concluded that the FEA results were in good agreement with the experimental results. The Nested-LET joint improved accuracy of the joint, and it can be used in the design of highprecision compliant joint.