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Using a two‐step molding process, wood plastic composite (WPC) were prepared under temperatures ranging from 160 to 180°C. Uniaxial compression tests of WPC were conducted at temperatures of −20°C, 0°C, 20°C, and 40°C, determining stress levels of 30%, 45%, and 60% based on the test results. Subsequently, 24‐hour compression creep tests were performed for WPC under 12 different conditions. The Findley power law model was employed to fit the experimental results, indicating that creep deformation increased with both stress level and environmental temperature. Notably, specimens at 0°C failed after sustaining a load for 13.6 hours at 60% stress, while those at 20°C failed after only 0.72 hours under the same conditions. Overall, the Findley model effectively predicted the creep behavior of WPC under all temperature conditions and stress levels. Highlights: The influence of temperature variation on the strength of WPC.Short term creep of WPC under different stress levels.Creep of WPC at different temperatures.Prediction of creep performance under different operating conditions. [ABSTRACT FROM AUTHOR]

Five groups of three‐point bending tests of wood plastic composites (WPCs) at different temperatures were conducted. The test temperatures ranged from −40 to 40°C, and the temperature difference of each group was 20°C. The results show that the bending strength and elastic modulus of the specimens decrease continuously with increasing temperature. Twenty‐four‐hour bending creep tests of WPCs under a 50% stress level were completed at different temperatures. The Findley model predicted the short‐term creep of WPCs better. According to the results of the short‐term creep tests, the horizontal shift factor was introduced based on the Prony series model. Then, we proposed a formula for creep compliance over time at different temperatures to predict the long‐term creep performance of WPCs under a 50% stress level at different temperatures. The results indicate that when the test temperature is less than 0°C, WPCs can hold the load for 50 years without entering the tertiary creep stage; at 20°C, the WPC specimen will fail at 24 days, whereas at 40°C, the specimen can only last for 24 h and then enters the tertiary creep stage until fracture damage occurs. [ABSTRACT FROM AUTHOR]

Wood‐plastic composites (WPC) were produced by a two‐step extrusion process, and the mechanical properties like strength, elastic modulus, and Poisson's ratio of WPC were investigated. Twenty‐four hours uniaxial tensile and compressive creep experimental tests under four stress levels of 15%, 30%, 45%, and 60% were completed. The results show that whether tensile or compressive creep, 15% and 30% stress levels are low‐stress levels and 60% is high. When the stress level is 60%, brittle fracture occurs in 2.6 h for the tensile creep test, while it arises in 16.6 h for the compressive experiment. The Findley model can predict the creep behavior of WPC at high, medium, and low‐stress levels, and the fractional‐order model has the highest fitting degree for the creep properties at high‐stress levels. [ABSTRACT FROM AUTHOR]