Fracture mechanics

weakening of a material caused by repeatedly applied loads

thumb|Ductile failure of a metallic specimen strained axially

shape and texture of the surface formed when a mineral is fractured

field of mechanics concerned with the study of the propagation of cracks in materials

charpy test

mechanical property of materials

growth of cracks in a corrosive environment

factor in fracture mechanics

high force or shock applied over a short time period when two or more bodies collide

Expansive chemical reaction damaging concrete

stress intensity factor at which a crack's propagation increases drastically

deliberately introduced defect in a planar material whereby stress is concentrated

thumbnail|right|Broken crankshaft failed from a surface defect at lower centre. The semi-elliptical beachmarks near the origin, indicate crack growth from Fatigue (material)|fatigue. Hachures are the lines on fracture surface that can be traced back to the origin of the fracture.

fatigue in a corrosive environment

term in mechanics

ability of a structure to safely withstand defects

equipment and procedure to measure materials' impact resistance

theory

applies cyclic loading to a coupon or structure to determine the rate of growth of cracks and fatigue life.

sound made by bending tin

empirical power law relating crack growth to stress intensity factor range

materials science algorithm

thumb|Crazes in polystyrene (PS) Crazing is a yielding mechanism in polymers characterized by the formation of a fine network of microvoids and fibrils. These structures (known as crazes) typically appear as linear features and frequently precede brittle fracture. The fundamental difference between crazes and cracks is that crazes contain polymer fibrils (5-30 nm in diameter), constituting about 50% of their volume, whereas cracks do not. Unlike cracks, crazes can transmit load between their two faces through these fibrils.