Long-term performance evaluation and prediction of composite materials and structures

复合材料和结构的长期性能评估和预测

• 批准号: 3808-2007
• 负责人: Ellyin, Fernand
• 金额: $ 4.52万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2010
• 资助国家: 加拿大
• 起止时间: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=449591
• 关键词: Long; term; performance; evaluation; prediction

At present materials are being engineered in response to specific product needs, e.g. increased stiffness which results in reduced weight, or improved corrosion resistance and fatigue lives. Examples of such materials are Advanced Composite Materials (ACM's) where the matrix (polymer, aluminum/titanium) is reinforced by fibres or particles of another stiffer material. While some of the mechanical properties are enhanced by the introduction of a second phase material (e.g. elastic modulus, ultimate strength, and corrosion or erosion resistance) other properties may be affected adversely (e.g. ductility, initiation of cracks, interfacial damage, micro-plasticity/creep, bond weakening under cyclic loading and resistance to temperature / environment). Thus a thorough investigation of the long-term behaviour of these advanced engineered materials is required before the full scope of their application can be assessed.

目前，正在根据特定的产品需求设计材料，例如增加硬度以减轻重量，或改善耐腐蚀性和疲劳寿命。这类材料的例子是先进复合材料(ACM)，其中基质(聚合物、铝/钛)由另一种较硬材料的纤维或颗粒增强。虽然一些机械性能通过引入第二阶段材料而得到提高(例如，弹性模数、极限强度和耐腐蚀性或耐磨性)，但其他性能可能会受到不利影响(例如，延展性、裂纹萌生、界面损伤、微塑性/蠕变、在循环载荷下的粘结弱化以及对温度/环境的抵抗力)。因此，需要对这些先进工程材料的长期行为进行彻底调查，然后才能全面评估它们的应用范围。