Conducting a fragility test To determine a damage boundary requires running two sets of tests. - A step velocity test is used to determine the product’s ∆Vc and a step acceleration test is used to determine Ac. 1.Step Velocity Test( Figure 14.3) to determine the vertical line of the damage boundary . 2.Step Acceleration Test(Figure 14.4) to determine the horizontal line of the damage boundary . a. A new test specimen be attached to the shock table. b.The drop height is set at a level which will produce a velocity change at least 1.57 x ∆Vc. c. The programmer compressed gas pressure is adjusted to produce a low g-level shock.Conducting a fragility test To determine a damage boundary requires running two sets of tests. - A step velocity test is used to determine the product’s ∆Vc and a step acceleration test is used to determine Ac. 1.Step Velocity Test( Figure 14.3) to determine the vertical line of the damage boundary . 2.Step Acceleration Test(Figure 14.4) to determine the horizontal line of the damage boundary . a. A new test specimen be attached to the shock table. b.The drop height is set at a level which will produce a velocity change at least 1.57 x ∆Vc. c. The programmer compressed gas pressure is adjusted to produce a low g-level shock