reikäporausmenetelmän

Reikäporausmenetelmä, often translated as "hole drilling method," is a technique used primarily in stress analysis and material characterization. It involves precisely drilling a small hole into a component or material where residual stresses are suspected. By carefully measuring the strain changes around the drilled hole using techniques like strain gauges, one can infer the magnitude and direction of the original stresses that were present before the material was disturbed by the drilling.

The principle behind the method relies on the fact that stresses within a material are redistributed when a hole is introduced. The amount of strain relief or change observed is directly related to the stress state that existed in the material at the location of the hole. This method is particularly useful for determining stresses in structures where other non-destructive methods are not feasible or accurate enough. It's a destructive testing technique, meaning the component is altered by the process.

Different variations of the reikäporausmenetelmä exist, often differing in the size and geometry of the drilled hole, as well as the type and arrangement of strain gauges used. The accuracy of the results is highly dependent on the precision of the drilling, the sensitivity of the strain measurement, and the correct application of theoretical stress analysis formulas. It is widely employed in industries such as aerospace, automotive, and civil engineering for quality control and structural integrity assessments.