Stiffness (within the elastic limit), while following a similar law, is less affected.
The elastic limit of the reinforcing bars was taken at 50,000 lbs.
It is always less than the load at elastic limit and is usually taken as a certain proportion of the ultimate or breaking load.
At a certain strain it should stretch; this is called the elastic limit.
The wire has now passed its elastic limit and has been permanently stretched.
The crank-shaft is made of chrome vanadium steel of an elastic limit of 115,000 pounds.
It is equal to the load at elastic limit (P1) divided by the area under the plate (B).
The appearance of the surface after the elastic limit is passed and the iron stretches is peculiar.
For air-dry wood the ratios are considerably lower, particularly in the case of the ultimate strength and the elastic limit.
This law is found in practice to be true for metals within a certain range of stress which lies below the elastic limit.
|elastic limit |
The stress point at which a material, if subjected to higher stress, will no longer return to its original shape. Brittle materials tend to break at or shortly past their elastic limit, while ductile materials deform at stress levels beyond their elastic limit.