受四点弯曲的非对称唇形槽截面层合梁

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-12 DOI:10.1016/j.tws.2025.113311

Filip Kazmierczyk, Monika Zaczynska, Tomasz Kubiak

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引用次数: 0

摘要

对具有唇形截面的GFRP短梁进行了四点弯曲试验研究。研究了非对称截面和非对称层合层排列形式的非对称性对屈曲和后屈曲行为的影响。研究发现，在弯曲作用下，短梁也可能存在畸变或侧向畸变屈曲模式。这些类型的屈曲模式可能导致后屈曲范围内的侧向挠曲，最终降低承载能力。由于不同类型的ABD矩阵耦合，非对称层排列具有不明显的行为特征。因此，分析了层的布置对横向挠度、屈曲载荷和承载能力的影响。建立了有限元模型，并通过试验验证了模型的正确性。进行了参数化研究，即检查非对称性对梁性能的影响。讨论了层布、截面、屈曲和后屈曲行为之间的关系。发现有可能找到提供最低横向挠度的非对称截面和层排列。

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Lipped channel section laminated beams with non-symmetries subjected to four-point bending

Short GFRP beams with lipped cross-section beams subjected to four-point bending have been investigated. The influence of non-symmetries in the form of non-symmetric cross-section and non-symmetric laminate layer arrangement on buckling and post-buckling behavior has been investigated. It was found that also for short beams under bending the distortion or lateral distortion buckling mode could exist. These types of buckling modes may lead to lateral deflection in the post-buckling range and finally decrease the load-carrying capacity. The non-symmetrical layer arrangement characterizes the non-obvious behavior due to different types of ABD matrix couplings. Therefore, it was danalyzed how the layer arrangements impact the lateral deflection, buckling load, and/or load-carrying capacity. The finite element model has been developed and validated by the results of experimental tests. The parametric studies, i.e., checking the influence of non-symmetries on beam behavior have been performed. Discussing relations between layer arrangements, cross-section, buckling, and post-buckling behavior is presented. Where it was found that it is possible to find non-symmetrical cross-section and layer arrangements that provide the lowest lateral deflections.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.