Prototype RuggedizationSolidworks FEA SimulationQuick turn around analysis

10/8/2016

Don Blanchet

3B Associates

dwb3298@verizon.net

Client request (very small start-up)

We have a voltage regulator brass board design. Will it withstand a 10 g load in 3 axes ?

Don asks : “what is the nature of the 10g load?” shock? Vibration?”

Just a 10g load………

Hey can you do the stress calculations or not ? We need a fast answer.

Model

Stacked power regulatorsWith rubber isolation bushings

16 places

1.2 x 2.6 x 3.6 inches

Weight = 0.36 lbs

ModelFEA mesh

650,000 degrees of freedom

Held at base only

Customer request – 10g static load y-axis

Probable rubberBushing tearing

On repeated loadingStress = 2173 psi

Customer request – 10g static load x and z axes

Bending stressIn aluminum

Spacer is well belowthe yield strengthOk for ZX loading

Vibration Modes from FEA

Eigenvalues

Vibration modes

Mode 1

Eigenvectors