# About | Developments | B3 | Stress Concentration Factor

**High Accuracy - with very few elements**

Typically, a notch is computed to within an accuracy of 2% error using an element division of only 4 elements per 90° angle of curvature. Doubling the element division, the accuracy is consistently better than 1% error.

**Ease of use**

Only the surface requires elements, so the volume remains free of element mesh. Accuracy is easily achieved because there is no (potentially low quality) volume mesh.

**Elements**

Quadratic shape functions (variables: nodal displacements and tractions). The elements are 6-node triangles, 8-node quadrilaterals and 9-node quadrilaterals.