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.
All bumble bees belong to the genus Bombus in the family Apidae. There are over 250 recognized species of bumble bees, each with its own scientific name; the scientific name o â¦ f the most common North American bumble bee is Bombus impatiens. 1 person found this useful.here are over 250 different species of bumble bees that can be found right across the world, each with its own scientific name.