Understanding shear in anisotropic materials for enhances sample attachment strategy

了解各向异性材料中的剪切以增强样品附着策略

• 批准号: 494081-2016
• 负责人: Labrosse, Michel
• 金额: $ 1.82万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=602986
• 关键词: Understanding; shear; anisotropic; materials; enhances

Planar biaxial testing makes it possible to explore a wide range of loads, understood here as forces or displacements, applied at once in two orthogonal directions to an approximately square membrane-like sample. Understanding of the loading conditions is straightforward as long as the axes of the machine are aligned with, or orthogonal to, the preferred directions of the materials (e.g. fiber orientation, or repeating geometrical features). However, precise knowledge of the preferred directions can be difficult to establish, and misalignment may result in uncontrolled for shear deformation and forces that develop in the sample. When this is suspected, the sample should be attached using a friction-free system of hooks and pulleys instead of user-friendly and efficient rigid rakes, to make sure that loading does not include shear forces. The research question is: can practical guidelines be produced for the users to know exactly when they should employ hooks

平面双轴测试使得探索各种载荷（这里理解为力或位移）成为可能，在两个正交方向上立即施加到近似正方形的膜状样品。只要机器的轴与材料的首选方向（例如纤维取向或重复的几何特征）对齐或正交，就可以直接了解负载条件。然而，很难确定首选方向的精确知识，并且未对准可能会导致样品中产生的剪切变形和力不受控制。当怀疑存在这种情况时，应使用钩子和滑轮的无摩擦系统而不是用户友好且高效的刚性耙子来连接样品，以确保加载不包括剪切力。研究问题是：能否制定实用的指南，让用户准确地知道何时应该使用 hooks