Break is defined as which fracture type?

• A. Sudden crack in column and noticeable collapse
• B. Thin planar crack crosses column
• C. Non planar irregular fracture
• D. Planar shear that required a tap to cross column

Answer: (C)

Break describes a non-planar irregular fracture surface. That means the crack doesn’t run along a single flat plane; instead, the fracture surface is rough, jagged, and three-dimensional due to varying material properties and complex loading. Planar fractures, by contrast, are smooth surfaces lying in a defined plane, and planar shear involves an orderly plane of failure oriented by shear. The described scenarios that imply a sudden collapse, a thin flat crack crossing the column, or a planar shear that needed tapping all reflect different fracture surfaces or failure modes, not the irregular, non-flat surface that characterizes a break. So the best fit is an irregular, non-planar fracture surface.