fatigue limit

"Steel has a fatigue limit," he said yesterday, using the engineering terminology.

The final limits would be for replacing equipment that wears out and the fatigue limit of the hull.

Like those made from steel, titanium structures have a fatigue limit which guarantees longevity in some applications.

Aluminum alloys do not have this lower fatigue limit and will continue to weaken with continued stress cycles.

Another weakness of mechanical gearboxes is their transient power limitation, due to structural fatigue limits.

In curve B, the fatigue failure at high stress levels is retarded, and the fatigue limit is eliminated.

Such high-strength materials generally exhibit higher fatigue limits, and can be used at higher service stress levels even under fatigue loading.

This contrasts with some steel and titanium alloys, which have clear fatigue limits and are easier to weld or braze together.

It plots stress amplitude against mean stress with the fatigue limit and the ultimate tensile strength of the material as the two extremes.

Steels typically have a fatigue limit, below which any quantity of stress load cycles will not cause metal fatigue and cracks/failures.

Fatigue limit and Endurance limit determines the durability of the frame when subjected to cyclical stress from pedaling or ride bumps.

Some materials (e.g., some steel and titanium alloys) exhibit a theoretical fatigue limit below which continued loading does not lead to structural failure.

Unlike steels, aluminium alloys have no well-defined fatigue limit, meaning that fatigue failure eventually occurs, under even very small cyclic loadings.

Also note the actual value of fatigue limit for an application can be dramatically affected by the conventional de-rating factors of loading, gradient, and surface finish.

Ship design criteria generally assume that all normal loads on the ship, times a moderate safety factor, should be below the fatigue limit for the steel used in their construction.

Where is the alternating stress, is the mean stress, is the fatigue limit for completely reversed loading, and is the ultimate tensile stress of the material.

ASTM does not define endurance limit, the stress value below which the material will withstand many load cycles, but implies that it is similar to fatigue limit.

An elevator test tower is a structure usually 100 to 140 metres tall that is designed to evaluate the stress and fatigue limits of specific elevator cars in a controlled environment.

In curve C, the whole curve is shifted to the left; this indicates a general lowering in fatigue strength, accelerated initiation at higher stresses and elimination of the fatigue limit.

However, the presence of a corrosive environment during fatigue loading eliminates this stress advantage, since the fatigue limit becomes almost insensitive to the strength level for a particular group of alloys.

In controlled laboratory conditions, steels display a fatigue limit, which is the stress amplitude below which no failures occur - the metal does not continue to weaken with extended stress cycles.

Designing underneath the fatigue limit coincidentally and beneficially gives large (factor of up to 6 or more) total safety factors from normal maximum operating loads to ultimate tensile failure of the structure.

For some materials, there is a theoretical value for stress amplitude below which the material will not fail for any number of cycles, called a fatigue limit, endurance limit, or fatigue strength.

In recent years, researchers (see, for example, the work of Bathias, Murakami, and Stanzl-Tschegg) have found that failures occur below the theoretical fatigue limit at very high fatigue lives (10 to 10 cycles).

Fatigue limit, endurance limit, and fatigue strength are all expressions used to describe a property of materials: the amplitude (or range) of cyclic stress that can be applied to the material without causing fatigue failure.