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An axial flux permanent magnet synchronous machine (AFPMSM) with double external rotors and coreless internal stator can operate at higher efficiency without the stator core losses and cogging torque.
The problem of solder joint fatigue is essentially one of fatigue crack growth. However, little work has been done that enables fatigue life predictions by means of tracking the crack front and its growth. Most popular fatigue life models are empirical and therefore, limited in their applicability and in the insight they provide. Analytical fracture mechanics approaches such as the Paris Law and the...
The physical occurrence that crack surfaces are in contact at the compressive edges when a flat or a shell is subjected to a bending load has been recognized. This article presents a theoretical analysis of crack–face contact effect on the stress intensity factor of various shell structures such as spherical shell, cylindrical shell containing an axial crack, cylindrical shell containing a circumferential...
The TEAM Workshop problem 22 deals with the optimization design of a superconducting magnetic energy storage (SMES). It is a benchmark optimization problem in electromagnetic device design. To address this problem, sequential response surface model method is presented in this paper. Compared with the direct optimization method, we can see that the number of finite element sample points can be obviously...
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