The study employed a self-developed 50t multi-axis fatigue electro-hydraulic servo
test system, capable of conducting various tests such as uniaxial dynamic stretching, biax?ial dynamic stretching, uniaxial tensile fatigue, and three-point bending fatigue tests, as
presented in Figure 1a.The equipment is jointly developed by Shenyang Aerospace Univer?sity and Shenyang Hongderun HVAC Equipment Co., Ltd., including a low-temperature
chamber, a universal testing machine from Changchun Xintai Testing Machine Co., Ltd.,
Polymers 2023, 15, 1648 3 of 14
and self-made three-point bending fixtures.