brittle fracture वाक्य
उदाहरण वाक्य
मोबाइल
- Microscopic surface examination indicates that brittle fracture is the main wear mode of the hard carbons in this test and the results are interpreted in terms of the microstructural features and characteristic elasticity properties of these solids.
- As the bolt has been formed from an appropriate high-strength alloy and has also been heat-treated, it is not subject to either the plastic shear failure typical of hot rivets nor the brittle fracture of ordinary bolts.
- During the 1970s, in conjunction with Dutch geologist Dr . Wim Kampschuur, the Tectosat Exploration System was developed, using brittle fracture patterns found on satellite imagery as a means of better understanding mechanisms and consequences of plate tectonics.
- Plastic bearings are subject to the same design cautions as all other plastic parts : creep, high thermal expansion, softening ( increased wear / reduced life ) at elevated temperature, brittle fractures at cold temperatures, and swelling due to moisture absorption.
- As a result of these studies it is now known that the typical moment-resisting connection detail employed in steel moment frame construction prior to the 1994 Northridge earthquake had a number of features that rendered it inherently susceptible to brittle fracture.
- Brittle fracture of modern vessels continues to occur from time to time because grade A and grade B steel of unknown toughness or fracture appearance transition temperature ( FATT ) in ships'side shells can be less than adequate for all ambient conditions.
- Classic cases of metal failures due to stress concentrations include metal fatigue at the corners of the windows of the De Havilland Comet aircraft and brittle fractures at the corners of hatches in Liberty ships in cold and stressful conditions in winter storms in the Atlantic Ocean.
- In 1946 he was made responsible for the project on brittle fracture at the NRL and in 1948 he was promoted from the head of the Ballistics Branch of the NRL to associate superintendent of the Mechanics Division . in 1950 he was again promoted to superintendent of the Mechanics Division.
- From this work Griffith formulated his own theory of brittle fracture, using elastic Griffith's criterion, basically states that when a crack is able to propagate enough to fracture a material, that the gain in the surface energy is equal to the loss of strain energy, and is considered to be the primary equation to describe brittle fracture.
- This ultimate failure is definite since the crack will propagate on its own once the length is greater than 2a . ( There is no additional energy required to increase the crack length so the crack will continue to enlarge until the material fails . ) The origins of the value 2a can be understood through brittle fracture.
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