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

平面双轴测试使得可以探索广泛的载荷，在这里被理解为力或位移，并在两个正交方向上一次应用于大约平方的膜样样品。只要机器的轴与材料的首选方向（例如纤维方向或重复的几何特征）对齐，对加载条件的理解是直接的。但是，对首选方向的精确知识可能很难建立，并且未对准可能导致剪切变形和样品中形成的力不受控制。当怀疑这一点时，应使用无摩擦的钩子和皮带轮系统而不是用户友好且有效的刚性耙子附加样品，以确保加载不包括剪切力。研究问题是：可以制定实用准则，以便用户确切知道何时应该使用钩子