Mycelium is a biopolymer that has the potential to be a sustainable replacement for petroleum based foams in some engineering applications. During a recent study, with the objectives to first relate the effects of growing conditions on material properties and second to develop a model to predict the bulk behavior of mycelium, it was found that a variety of standard test methods are being used for the tensile characterization of mycelium in the literature. In the current study, these test methods were found to cause stress concentrations that resulted in maximum loads away from the gauge section, griping conditions that crushed the test samples through the thickness, and gauge sections that were smaller than the level of heterogeneity typically observed in samples of mycelium biopolymer. A new tensile specimen configuration has been developed that mitigates the issues associated with other specimen configurations. This new specimen configuration is used to determine the tensile strength, tensile modulus, and Poisson’s ratio of mycelium biopolymer specimens.

中文翻译：

---

一种用于表征散装菌丝体生物聚合物的新型拉伸试样配置

菌丝体是一种生物聚合物，有可能在某些工程应用中成为石油基泡沫的可持续替代品。在最近的一项研究中，为了首先将生长条件对材料特性的影响联系起来，然后开发一个模型来预测菌丝体的整体行为，发现各种标准测试方法正在用于拉伸表征文献中的菌丝体。在目前的研究中，发现这些测试方法会导致应力集中，从而导致最大载荷远离量规部分，夹紧条件使测试样品压碎整个厚度，以及量规部分小于通常在测量中观察到的异质性水平。菌丝体生物聚合物样品。已开发出一种新的拉伸试样配置，可减轻与其他试样配置相关的问题。这种新的试样配置用于确定菌丝体生物聚合物试样的拉伸强度、拉伸模量和泊松比。