Wood–plastic composites (WPCs) are environmentally friendly materials with good weather resistance and low cost. To investigate the feasibility of their use in different environments, a WPC was designed and subjected to a uniaxial compression test at seven temperatures to obtain the failure mode, uniaxial compressive strength, elastic modulus, proportional limit stress, peak stress, and ultimate strain. The results showed the following. The failure modes of the WPC specimens at various temperatures were mainly shear compression failure, double shear failure, and end compression failure. The uniaxial compressive strength and elastic modulus decreased with increasing temperature. Specifically, at temperatures of −60°C, 20°C (normal temperature), and 60°C, the WPC had an average compressive strength of 73.55, 33.7, and 13.51 MPa, respectively, and an average elastic modulus of 7819.11, 6141.71, and 2650.17 MPa, respectively. In terms of the WPC's stress–strain relationship, at a temperature greater than the normal temperature, the WPC had a small peak stress but good ductility; at the normal temperature and below, the WPC had a large peak stress but poor ductility. Based on these findings, the experimental phenomena and characteristic constants were analyzed to establish models of factors that reduce the uniaxial compressive elastic modulus and compressive strength of WPC at different temperatures, to provide a theoretical basis for the mechanical calculations for the application of WPC in various extreme environments.

中文翻译：

---

不同温度下木塑复合材料抗压性能的实验研究

木塑复合材料（WPCs）是环保材料，具有良好的耐候性和低成本。为了研究它们在不同环境中使用的可行性，设计了一种 WPC，并在七个温度下进行了单轴压缩试验，以获得失效模式、单轴抗压强度、弹性模量、比例极限应力、峰值应力和极限应变。结果显示如下。WPC试件在不同温度下的破坏模式主要为剪切压缩破坏、双剪切破坏和端部压缩破坏。单轴抗压强度和弹性模量随温度升高而降低。具体而言，在 -60°C、20°C（常温）和 60°C 的温度下，WPC 的平均抗压强度分别为 73.55、33.7 和 13.51 MPa，平均弹性模量分别为 7819.11、6141.71 和 2650.17 MPa。就WPC的应力-应变关系而言，在高于常温的温度下，WPC的峰值应力较小，但塑性较好；在常温及以下，WPC的峰值应力较大，但延展性较差。在此基础上，通过对实验现象和特征常数的分析，建立了不同温度下降低WPC单轴压缩弹性模量和抗压强度的因素模型，为WPC在各种应用中的力学计算提供理论依据。极端环境。在高于常温的温度下，WPC的峰值应力小，但延展性好；在常温及以下，WPC的峰值应力较大，但延展性较差。在此基础上，通过对实验现象和特征常数的分析，建立了不同温度下降低WPC单轴压缩弹性模量和抗压强度的因素模型，为WPC在各种应用中的力学计算提供理论依据。极端环境。在高于常温的温度下，WPC的峰值应力小，但延展性好；在常温及以下，WPC的峰值应力较大，但延展性较差。在此基础上，通过对实验现象和特征常数的分析，建立了不同温度下降低WPC单轴压缩弹性模量和抗压强度的因素模型，为WPC在各种应用中的力学计算提供理论依据。极端环境。