Open-Hole tensile tests on poplar veneer laminates and plywood: Applicability of the point stress criterion

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-09-15 DOI:10.1016/j.compstruct.2025.119658

A. Peignon , J. Serra , A. Cantarel , F. Eyma , B. Castanié

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Abstract

This study explores the open-hole tensile strength of two types of poplar veneer laminates: a quasi-isotropic laminate [90°/45°/0°/–45°]_s and a plywood laminate [90°/0°/90°/0°_1/2]_s. The effects of hole diameter and specimen geometry on tensile strength were examined, and the Point Stress Criterion (PSC) was used to evaluate material behaviours. The results show that the stress concentration values (d₀) for the veneer laminates align closely with those of fibre-reinforced polymer composites, demonstrating the applicability of the PSC to wood-based laminates.

While the d₀ values are similar to those observed in synthetic composites, the failure mode differs significantly. Unlike most synthetic composites, no delamination occurs near the hole or along the edges of the studied laminates. Instead, the specimens exhibit a brittle fracture mode, characterised by sudden failure without ply separation.

These findings provide insights into the influence of hole effects on laminate design and suggest that the PSC can be used to optimise the performance of veneer laminates in engineering applications.

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杨木单板和胶合板的开孔拉伸试验：点应力准则的适用性

本研究探讨了两种杨木贴面层压板的开孔拉伸强度：准各向同性层压板[90°/45°/0°/ -45°]s和胶合板层压板[90°/0°/90°/0°1/2]s。研究了孔直径和试样几何形状对拉伸强度的影响，并使用点应力准则（PSC）评估材料行为。结果表明：贴面复合材料的应力集中值（d0）与纤维增强聚合物复合材料的应力集中值（d0）基本一致，表明了PSC在木基复合材料中的适用性；虽然d0值与合成复合材料中观察到的值相似，但破坏模式明显不同。不像大多数合成复合材料，没有分层发生在孔附近或沿研究层压板的边缘。相反，试样表现出脆性断裂模式，其特征是突然破坏而没有层分离。这些发现为孔效应对层压板设计的影响提供了见解，并表明PSC可用于优化工程应用中的贴面层压板的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.