Acquisition of Advanced Engineered Wood Composites Manufacturing and Science Laboratory

9871411 Dagher这一行动是为了响应重大研究仪器倡议MRI'98（NSF-98-16）。 其目的是升级缅因州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，旨在开发下一代建筑用木材复合材料。 最近的研究表明，复合增强木材（CRW）提供了上级性能，降低成本。 在钢筋混凝土和预应力混凝土的开发中，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、面板和连接件。 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，管理短期和长期结构行为的原则在许多方面与仅涉及两种材料中的一种的原则不同。 该项目的重点是：开发一种与木材相容的新型FRP增强材料，特别是其低膨胀和粘弹性。随着时间的推移，开发和保持两种材料之间的界面（粘结），以确保充分的复合作用（这将需要对粘结耐久性机制的基本理解）。开发CRW结构元件的短期和长期行为的基本理解，包括在整个载荷范围内的性能，极限强度，延展性，蠕变，疲劳，和水分/温度/紫外线循环。研究在四个不同的层次进行：微观，中观，宏观和结构。 一个多学科团队将进行研究，由来自缅因州大学（土木/结构工程，木材科学与技术和化学工程），行业支持的SPI复合材料研究所，位于Winona MN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的三个单位的十名工程师和科学家组成。

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.