气候条件变化对木质织复合材料性能的影响
Claudia L von Boyneburgk1, Hans-Peter Heim1
1Institute of Materials Engineering, Plastics Engineering, University of Kassel, 34125 Kassel, Germany.
Materials (Basel, Switzerland)
|June 27, 2025
概括
木质织复合材料 (WTCs) 在户外降解,特别是在水暴露和人工气候影响下. 稳定对于这些聚烯和柳树木材料的耐用户外应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 复合材料 复合材料 复合材料
背景情况:
- 木质织复合材料 (WTC) 具有各种应用的潜力.
- 世界贸易中心对户外气候的固有易感性,需要进行耐用性研究.
- 了解材料降解是提高WTC性能的关键.
研究的目的:
- 调查不同气候条件对WTC的影响.
- 分析衰老对WTC维度稳定性,化学成分和机械性能的影响.
- 确定WTC的退化机制,并为稳定策略提供信息.
主要方法:
- 世界贸易中心及其组件在炉干燥,,标准/热带气候,人工气候和储水等条件下经历了老化.
- 评估尺寸稳定性,通过FTIR进行化学变化,使用μ-CT进行机械损伤,以及机械性能.
- 抗拉强度,模量,破裂时的延长和冲击强度的量化变化.
主要成果:
- 储水导致胀,使模量减少45%,但延长 (+88%) 和冲击强度 (+75%) 增加.
- 人工气候显著降低了WTC,拉伸强度降低 (-28%),模量 (-49%) 和冲击强度 (-26%).
- 干,和热带气候对WTC物业产生了轻微的影响.
结论:
- 户外暴露,特别是水和人工气候,导致WTCs的显著退化.
- 退化损害了WTCs的中期完整性和性能.
- 有效的稳定策略,包括聚合物修改或结构保护,对于长期的户外耐用性至关重要.
相关概念视频
Seasoning of Wood
183
Seasoning of wood is a crucial process aimed at reducing and stabilizing the moisture content within the wood to prevent future shrinkage, structural damage, or aesthetic issues once the wood is used in construction. Wood naturally swells when it absorbs moisture and contracts as it dries.
Achieving equilibrium moisture content is the goal of seasoning; this is the point where the wood's moisture content stabilizes to align with the moisture levels of the surrounding environment. Proper...
Achieving equilibrium moisture content is the goal of seasoning; this is the point where the wood's moisture content stabilizes to align with the moisture levels of the surrounding environment. Proper...
183
Responses to Heat and Cold Stress
13.9K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.9K
Global Climate Change
24.8K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.8K
Wood Products
134
Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
134
Softwoods and Hardwoods
257
Softwoods and hardwoods, derived from different types of trees, are distinguished by their leaf structures and cellular compositions, each serving unique purposes in construction and manufacturing. Softwoods come from cone-bearing trees with needle-like leaves and are predominantly composed of longitudinal cells called tracheids and a smaller proportion of radial cells known as rays. Due to their cellular structure, softwoods are commonly used in construction for structural frames, sheathing,...
257
Bending of Members Made of Several Materials
269
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
269


