Multiscale experimental and numerical study of the thermomechanical behavior of composite sandwich panels towards the integration of environmental effects to the virtual testing method

复合材料夹芯板热机械行为的多尺度实验和数值研究，将环境影响整合到虚拟测试方法中

• 批准号: RGPIN-2021-04227
• 负责人: JeanStLaurent, Mathilde
• 金额: $ 1.97万
• 依托单位: Université du Québec à Trois-Rivières
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=754455
• 关键词: Multiscale; experimental; numerical; study; thermomechanical

Composite sandwich panels are increasingly used in many applications such as space structures, naval structures, wind turbines, aircraft, etc. In all of these applications, they are subjected to cyclic environmental conditions which leads to the development of internal stresses at different scales caused by the anisotropy and heterogeneity of composite structures. The cyclic nature of these internal stresses can in turn lead to damage development. Temperature and humidity also influence the mechanical properties and the fracture behavior of sandwich panels constituents. Large time and money investments are required to develop composite structures. Because of that, industries are turning to numerical simulations and virtual testing. The principle behind virtual testing is that each experimental test required for the development of a composite structure, starting at the coupon scale and evolving toward large scale testing, can all be performed virtually using numerical simulations. Testing in various experimental conditions is part of the development of composite structures and thus could be integrated to the virtual testing method. The long-term goal of the proposed research program is to integrate the effects of environmental conditions on the mechanical behavior of composite structures to the virtual testing process. In order to do so, a better understanding of the effect of temperature on composite structures and their constituents and the development of numerical tools are required. For now, the research program is focused on the effect of temperature, but will, in the future, include the effect of other environmental conditions such as humidity. As a starting point, the project is developed around composite sandwich panels as the main type of structures studied. However, because the research program aims to look at the multiscale nature of the phenomena caused by temperature changes, laminates, cores and composite assemblies are also part of the proposed research program. The research program is centered a

复合材料夹芯板越来越多地用于许多应用，如空间结构、海军结构、风力涡轮机、飞机等。在所有这些应用中，它们都受到循环环境条件的影响，导致在不同尺度上产生内应力，这些内应力是由复合材料结构的各向异性和异质性。这些内应力的循环性质反过来会导致损坏的发展。温度和湿度也会影响夹芯板成分的机械性能和断裂行为。 开发复合结构需要大量的时间和金钱投资。因此，各行业正在转向数值模拟和虚拟测试。虚拟测试背后的原理是，复合结构开发所需的每项实验测试（从优惠券规模开始到大规模测试）都可以使用数值模拟进行虚拟执行。各种实验条件下的测试是复合结构开发的一部分，因此可以集成到虚拟测试方法中。 拟议研究计划的长期目标是将环境条件对复合材料结构机械行为的影响整合到虚拟测试过程中。为了做到这一点，需要更好地了解温度对复合材料结构及其成分的影响，并开发数值工具。目前，该研究计划的重点是温度的影响，但将来将包括湿度等其他环境条件的影响。作为起点，该项目是围绕复合夹芯板作为研究的主要结构类型而开发的。然而，由于该研究计划旨在研究由温度变化引起的现象的多尺度性质，因此层压板、芯材和复合材料组件也是拟议研究计划的一部分。 该研究计划的中心是