The anisotropic material behavior of wood, considered as a cylindrically orthotropic material with annual rings, leads to several different failure mechanisms already under uniaxial stresses. Stress interaction becomes important in the engineering design of structural elements and is often predicted by failure criteria based on uniaxial properties. The prediction quality of failure criteria has been assessed with longitudinal shear stress interaction, though less is known on rolling shear stress in interaction with stress perpendicular to the grain. The study aims at investigating the corresponding mechanical behavior of Norway spruce (Picea abies) clear wood by validating failure envelopes for stress combinations in the cross-sectional plane, based on experimental investigations. For this purpose, a test setup that controls the stress interaction and loading of clear wood along pre-defined displacement paths needed to be developed. Experimentally defined failure states could then be compared to failure surfaces predicted by the phenomenological failure criteria. Material behavior was quantified in terms of stiffness, strength, and elastic and post-elastic responses on dog-bone shaped specimens loaded along 12 different displacement paths. A comparison with failure criteria for two nominal compressive strain levels showed that a combination of failure criteria would be required to represent the material behavior and consider the positive effect of compressive stresses on the rolling shear strength. The findings of this work will contribute to studying local stress distribution of structural elements and construction details, where stress interactions with rolling shear develop.

木材的各向异性材料行为，被认为是具有年轮的圆柱正交异性材料，导致在单轴应力下已经出现了几种不同的破坏机理。应力相互作用在结构元件的工程设计中变得很重要，并且通常由基于单轴特性的破坏准则来预测。通过纵向剪切应力相互作用评估了失效标准的预测质量，尽管对于滚动剪切应力与垂直于晶粒的应力相互作用的了解还很少。该研究旨在调查挪威云杉（Picea abies）根据实验研究，通过验证横截面中应力组合的破坏包络来清除木材。为此，需要开发一种测试装置来控制应力相互作用以及沿预定位移路径的透明木材负荷。然后可以将实验定义的故障状态与现象学故障准则预测的故障表面进行比较。根据沿12条不同位移路径加载的狗骨头形试样的刚度，强度以及弹性和弹性后响应，量化了材料的行为。与两个标称压缩应变水平的破坏准则进行比较表明，需要使用破坏准则的组合来表示材料的行为并考虑压缩应力对轧制剪切强度的积极影响。这项工作的结果将有助于研究局部应力分布的结构元素和施工细节，其中应力与滚动剪切相互作用的发展。