Causes and Assessment of Track Rubber Pad Aging
What is rubber pad aging?
Rubber pad aging refers to the gradual deterioration of material properties under environmental and load conditions, resulting in hardening, cracking, deformation, and loss of elasticity. It is a normal failure mode for rubber components.
What are the main factors causing rubber pad aging?
Temperature changes, ultraviolet radiation, oxygen and ozone, water immersion, load fatigue, chemical media, oil stains, and dust all accelerate aging.
What are the typical manifestations of rubber pad aging?
Surface cracking, hardening and brittleness, crumbling, decreased elasticity, compression deformation, reduced thickness, cracks, and even breakage.
What are the effects of pad aging on the track?
Reduced vibration damping and cushioning effect, increased wheel-rail impact, worsened stress on fasteners, uneven rail surface, and accelerated fatigue damage to rails, bolts, elastic clips, and other components.
How to determine on-site whether rubber pads need replacement?
Observe for cracking, deformation, and powdering; measure thickness and hardness; check for a significant decrease in elasticity; replace promptly when the service life has been reached or obvious aging is observed.