plane of weakness

plane of weakness

Of a structure under stress, that plane along which fracture is most likely to take place, as a result of design or accident or the properties of the structure and its loading.
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We present below a case of a 37 year old man with SCC of the left forefoot, which spread through a natural plane of weakness in the dermal-epidermal junction as a complication of the congenital weakness in the area resulting from EB.
That, combined with the geometric notch at the root of the head, creates a plane of weakness in the rivet.
Mica, calcite, clay, and fossils tend to be deposited more or less on surfaces parallel to the bedding planes and laminations and form a plane of weakness along which rock strata can easily separate.
The first break occurred in a crystallographic plane of weakness close to the point of attachment.