“Since materials plastically deform as the yield stress is exceeded, a plastic zone will form near the crack tip.”

“The sheets are drawn over shaped formers to the extent that they deform plastically and assume the required profiles.”

“If a flexible pipe is subject to severe bending, the innermost steel carcass may seize and plastically deform.”

“The opportunity to plasticly change the relative investment in reproduction and growth would therefore have to occur early in life.”