Modified Material Properties in Curved Panels Through Lamina Emergent Torsional Joints
Modified Material Properties in Curved Panels Through Lamina Emergent Torsional Joints
复制标题
DOI：
10.1109/remar.2018.8449881
复制
发表时间：
2018-06
期刊：
影响因子：
--
通讯作者：
Trent K. Zimmerman;Jared Butler;D. Frandsen;Dakota Burrow;D. Fullwood;S. Magleby;L. Howell
中科院分区：
文献类型：
--
作者：
Trent K. Zimmerman;Jared Butler;D. Frandsen;Dakota Burrow;D. Fullwood;S. Magleby;L. Howell
柔性连接具有许多优点，使其适用于高度约束的设计问题。虽然已经做了大量的工作，从平面板材制造的柔顺接头的设计，这项工作的重点是圆柱弯曲接头的设计。提出了一种在弯曲薄板材料中利用薄板突扭连接提高储能效率的方法。本文建立了一个数值计算模型，用于预测LET节点的刚度和最大弯矩。利用预测的弯曲LET接头刚度和最大力矩来创建形状因子，该形状因子产生有效弹性模量和有效回弹模量。对于一个给定的情况下，示出的有效弹性模量减少约三个数量级，而有效的回弹性减少约一个数量级。设计人员可以使用这些信息来定制材料以满足设计要求，或选择以前不适合应用的替代材料。
Compliant joints have a number of advantages that make them suitable for highly constrained design problems. While much work has been done on the design of compliant joints manufactured from planar sheet materials, this work focuses on the design of cylindrically-curved joints. A method for using lamina emergent torsional (LET) joints to increase energy storage efficiency in curved sheet materials is presented. A numerical model is provided for predicting the stiffness and maximum applied moment of a curved LET joint. Predicted curved LET joint stiffnesses and maximum moments are utilized to create shape factors that produce an effective modulus of elasticity and an effective modulus of resilience. For a given case, the effective modulus of elasticity is shown to decrease by about three orders of magnitude while the effective resilience decreases by approximately one order of magnitude. Designers can use this information to tailor materials to fit design requirements or to select alternative materials that were previously unsuited for an application.