Rubber materials are widely used in many applications. The most important applications of rubber materials are seals, tires, gaskets, hoses, hydraulic-pneumatic systems and vibration absorbers. Today, the working environment of rubbers varies. It has become important to see the responses of developed rubber materials to these challenging working conditions. Most rubber parts are subjected to fluctuating loads that can cause fatigue damage in their work environments. In this study, fatigue strength and spring stiffness of rubber materials under different environmental conditions is investigated. Three general factors that affect fatigue strength of rubber materials are the effects of mechanical loading, environmental effects and the effects of rubber formulation. In this study these factors are examined. For this purpose, fatigue strength and spring stiffness of natural rubber (NR), specially developed natural rubber (S-NR) and ethylene propylene diene monomer (EPDM) rubber were examined. The fatigue tests of rubber samples were performed before and after aging processes. During the study, the static and dynamic stiffness values of the rubber materials were examined before and after aging processes. As a result of experimental study, it was found that fatigue life decreases as a result of accelerated aging and annealing in heated oil processes for NR, EPDM and S-NR samples. Annealing in heated oil process is more effective in reducing fatigue life of rubber samples compared to accelerated aging. In this study, it is seen that S-NR rubber has the highest fatigue strength among rubber materials tested. It has been determined that production of samples with the semi-active vulcanization system is the most important parameter in increasing fatigue strength. In S-NR samples produced with the semi-active vulcanization system, the loss in spring stiffness occurring under different aging conditions is less compared to the loss in spring stiffness in conventional vulcanization system produced NR and EPDM samples.

橡胶材料广泛用于许多应用中。橡胶材料最重要的应用是密封件，轮胎，垫圈，软管，液压气动系统和减震器。如今，橡胶的工作环境各不相同。重要的是要了解发达的橡胶材料对这些挑战性工作条件的反应。大多数橡胶部件承受的波动载荷可能会在其工作环境中造成疲劳损伤。在这项研究中，研究了橡胶材料在不同环境条件下的疲劳强度和弹簧刚度。影响橡胶材料疲劳强度的三个一般因素是机械载荷的影响，环境影响和橡胶配方的影响。在这项研究中，检查了这些因素。以此目的，研究了天然橡胶（NR），特制天然橡胶（S-NR）和乙丙二烯单体（EPDM）橡胶的疲劳强度和弹簧刚度。橡胶样品的疲劳测试是在老化过程之前和之后进行的。在研究过程中，在老化过程之前和之后检查了橡胶材料的静态和动态刚度值。实验研究的结果表明，由于NR，EPDM和S-NR样品的加热油工艺加速了老化和退火，疲劳寿命降低了。与加速老化相比，在加热油过程中进行退火可以更有效地减少橡胶样品的疲劳寿命。在这项研究中，可以看出，S-NR橡胶在测试的橡胶材料中具有最高的疲劳强度。已经确定，使用半主动硫化系统生产样品是增加疲劳强度的最重要参数。在用半主动硫化系统生产的S-NR样品中，与在传统硫化系统生产的NR和EPDM样品中弹簧刚度的损失相比，在不同老化条件下发生的弹簧刚度的损失要少。