Engineering, 02.11.2019 06:31 joey333
Acritical component for a mechanical system will be subjected to a 0.01 hz cyclical stress during operation (0.01 cycles per second). the stress will fluctuate between a tensile load of 150 mpa and a compressive load of -250 mpa. the design calls for a survival rate of 90% (i. e. 10% failure rate acceptable). approximately how long, in days, can the component be used before it must be replaced during maintenance ? answer format: x (no decimal) answer unit: day the fatigue lifetime curves (for various confidence intervals) for the material are given below. if you don't immediately recall, you should be able to conceptually discern whether the "p = x" label indicates a probability of failure or survival. note on this figure, s stands for stress amplitude.
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Engineering, 04.07.2019 18:10
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.
Answers: 1
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
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Engineering, 04.07.2019 18:10
Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed.gi) ifn 1, what will happen to the material when transformed material when
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Engineering, 04.07.2019 18:10
Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.
Answers: 1
Acritical component for a mechanical system will be subjected to a 0.01 hz cyclical stress during op...
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