Secondary stress. A secondary stress is any stress in the structure which is not a primary stress or peak stress. Source: API SPEC 16R, Specification for Marine Drilling Riser Couplings, Exploration and Production Department, First Edition, January 1997. Global Standards.
Digger bees are sometimes classified in the family Anthophoridae along with the carpenter bees. These hairy bees range from 5 to 25 mm in length and, like other members of this family, the females use scopae (stiff hairs) to carry pollen. Most species nest in the ground or in vertical banks, often in sandy soil. Some species waterproof their brood cells with secreted waxy or oily material.
For honey bees, the male is the drone, the queen and workers are all female. Drones' eyes are almost twice the size of a worker bee's eyes and their body is stockier and heaâ¦vier than a worker, but not as big as a queen. Despite their heavier weight, drones can fly fast enough to catch up with a queen.