论文标题
关于大变形接触辅助形状的拓扑优化符合形态的机制
On topology optimization of large deformation contact-aided shape morphing compliant mechanisms
论文作者
论文摘要
提出了用于设计大变形接触辅助形状变形机制的拓扑优化方法。这种机制可用于不同的操作条件。设计域由常规的六边形元素描述。负圆面膜被用来执行双重任务，即决定每个元素的材料状态，还可以生成刚性接触表面。每个蒙版的特征是五个设计变量，这些变量被基于零级的爬山优化器突变。考虑了几何和材料非线性。使用边界分辨率和平滑方案确保正常与候选设计边界的连续性。非线性机械平衡方程是使用牛顿 - 拉夫森法求解的。接触公式采用了一种与细分之间的接触方法相关的更新的Lagrange方法。允许相互接触模式。通过为不同所需曲线设计四个接触辅助形状的机制，可以证明该方法的功效。使用商业软件验证了变形配置文件的性能。还研究了摩擦接触表面对实际轮廓的影响
A topology optimization approach for designing large deformation contact-aided shape morphing compliant mechanisms is presented. Such mechanisms can be used in varying operating conditions. Design domains are described by regular hexagonal elements. Negative circular masks are employed to perform dual task, i.e., to decide material states of each element and also, to generate rigid contact surfaces. Each mask is characterized by five design variables, which are mutated by a zero-order based hill-climbing optimizer. Geometric and material nonlinearities are considered. Continuity in normals to boundaries of the candidate designs is ensured using a boundary resolution and smoothing scheme. Nonlinear mechanical equilibrium equations are solved using the Newton-Raphson method. An updated Lagrange approach in association with segment-to-segment contact method is employed for the contact formulation. Both mutual and self contact modes are permitted. Efficacy of the approach is demonstrated by designing four contact-aided shape morphing compliant mechanisms for different desired curves. Performance of the deformed profiles is verified using a commercial software. The effect of frictional contact surface on the actual profile is also studied
