Cyclic loading refers to the repeated application of load or stress on a material or structure over time. This type of loading can lead to fatigue, which is the gradual weakening of a material due to repeated stress cycles. Engineers often study cyclic loading to predict how materials will behave under real-world conditions, such as in bridges or aircraft. In many applications, such as automotive and construction, understanding cyclic loading is crucial for ensuring safety and durability. Materials like metals and polymers can exhibit different responses to cyclic loading, making it essential to choose the right material for specific uses.