![subject](/tpl/images/cats/User.png)
Engineering, 29.10.2019 03:31 libertycooper
Asteel having a yield strength of 1,450 mn/m² and a fracture toughness of 55 mn/m3/2 is placed into service. quality control indicates that brittle inclusions, which fractured during the manufacturing of the steel, are present in the steel and that the maximum dimension of these inclusions is about 20 microns. this dimension can be considered to be the length of an existing interior crack in the steel. a thick disk of this plate is placed into service. a) show that the steel will yield plastically before cracks associated with the inclusions propagate through the material. take the value for parameter & = 1.05. b) what size would the inclusions have to be in order to have the material fracture before it yielded plastically? [ref: mechanical behavior of materials, courtney, 2000) hint: stress required to propagate a crack through is estimated by og = where c is the crack length (or 2c for an interior crack length), a is a constant on the order of unity and dependent on the crack geometry, k is the material property called the fracture toughness. f/2
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Engineering
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.
Answers: 1
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 18:10
Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines
Answers: 1
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 19:10
How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?
Answers: 2
![question](/tpl/images/cats/User.png)
Engineering, 04.07.2019 19:20
Determine the stoichiometric and actual air-fuel ratios and the mole flue gas composition for combustion with 15% excess air for raw indiana, pennsylvania raw coal.
Answers: 3
You know the right answer?
Asteel having a yield strength of 1,450 mn/m² and a fracture toughness of 55 mn/m3/2 is placed into...
Questions
![question](/tpl/images/cats/istoriya.png)
History, 13.11.2020 18:50
![question](/tpl/images/cats/mat.png)
Mathematics, 13.11.2020 18:50
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 13.11.2020 18:50
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 13.11.2020 18:50
![question](/tpl/images/cats/mat.png)
Mathematics, 13.11.2020 18:50
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 13.11.2020 18:50
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 13.11.2020 18:50
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 13.11.2020 18:50
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 13.11.2020 18:50
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 13.11.2020 18:50
![question](/tpl/images/cats/mkx.png)
Arts, 13.11.2020 18:50
![question](/tpl/images/cats/biologiya.png)
Biology, 13.11.2020 18:50