Acquisition of Advanced Engineered Wood Composites Manufacturing and Science Laboratory

9871411 dagh此行动是对重大研究仪器计划MRI'98 （NSF-98-16）的回应。目的是升级缅因大学的复合增强木材（CRW）制造科学实验室。该实验室是新设施的一部分，旨在开发用于建筑的下一代木质复合材料。最近的研究表明，复合增强木材（CRW）以较低的成本提供了优越的性能。在钢筋混凝土和预应力混凝土的发展过程中，需要进行基础研究，以释放各种CRW结构构件的全部潜力，例如托梁、梁、柱、板和连接。CRW混合材料的独特之处在于两种非常不同的材料，FRP和木材一起使用；因此，控制短期和长期结构行为的原则在许多方面与只涉及两种材料中的一种的原则不同。该项目将侧重于：开发一种与木材兼容的新型FRP增强材料，特别是其低膨胀和粘弹性。随着时间的推移，开发和维护两种材料之间的界面（粘合），以确保完全的复合作用（这将需要对粘合耐久性机制的基本理解）。对CRW结构元件的短期和长期性能有基本的了解，包括在全载荷范围内的性能、极限强度、延性、蠕变、疲劳、湿度/温度/紫外线循环。研究在四个不同的层面进行：微观、中观、宏观和结构。一个由10名工程师和科学家组成的多学科团队将进行这项研究，他们分别来自缅因大学（土木/结构工程、木材科学与技术和化学工程）、工业支持的SPI复合材料研究所、位于明尼苏达州威诺纳的复合材料工程中心（COMTEC）和位于麦迪逊的美国农业部林产品实验室。

9871411DagherThis action is in response to the Major Research Instrumentation Initiative MRI'98 (NSF-98-16). The purpose is to upgrade a Composite-Reinforced-Wood (CRW) Manufacturing Science Laboratory at the University of Maine. The laboratory is part of a new facility designed to develop the next generation of wood composites for construction. Recent research has shown that Composite Reinforced Wood (CRW) offers superior properties at reduced costs. As in the development of reinforced and prestressed concrete, basic research is needed to unlock the full potential of a wide variety of CRW structural members, e.g. joists, beams, columns, panel and connections. CRW hybrids are unique in that two very different classes of material, FRP and wood are used together; thus the principles governing the short and long-term structural behavior differ in many ways form those involving only one of the two materials. This project will focus on:Developing a new class of FRP reinforcing materials that are compatible with wood, particularly its hypoexpansion and visco-elastic properties.Developing and maintaining over time the interface (bond) between the two materials needed to ensure full composite action (this will require a basic understanding of the mechanisms of bond durability).Developing a basic understanding of the short and long-term behavior of CRW structural elements including performance over the full range of loading, ultimate strength, ductility, creep, fatigue, and moisture/temperature/UV cycling.The research is conducted at four different levels: micro, meso, macro and structural. A multi-disciplinary team will conduct the research composing ten engineers and scientists from three units at the University of Maine (civil/structural engineering, wood science and technology, and chemical engineering), the industry-supported SPI composites Institute, the Composites Materials Engineering Center (COMTEC) in Winona MN, and the USDA Forest Products laboratory in Madison.