Formulas: Fragility (Procedure iii)

MIL-STD-810H, Environmental Engineering Considerations and Laboratory Tests

Last Updated 29 Oct 2026

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Formula 1

\begin{aligned} A_{m} g & =\frac{\Delta V}{T_{D}} \quad \text { (from } \Delta V=A_{m} g T_{D}) . \Delta V=2 \sqrt{2 g h} \text { and } T_{D}=\frac{2 \sqrt{2 g h}}{A_{m} g} \\ \text { (technically } \Delta V & =A_{m} g\left(T_{D}-0.5 T_{R}-0.5 T_{F}\right) \cong A_{m} g T_{D} \text { for } T_{D} \gg T_{R}, T_{F}\end{aligned}

Figure 516.8-7 provides the 100 percent rebound $\Delta V$ versus drop height $h$ based upon the simple relationship $h=(\Delta V)^{2} / g$ .

h=(\Delta V)^{2} / g

MIL-STD-810H, Environmental Engineering Considerations and Laboratory Tests

Last Updated 29 Oct 2026

Hover any section to copy its link or text, ask Copilot about it, or bookmark it.

\begin{aligned} A_{m} g & =\frac{\Delta V}{T_{D}} \quad \text { (from } \Delta V=A_{m} g T_{D}) . \Delta V=2 \sqrt{2 g h} \text { and } T_{D}=\frac{2 \sqrt{2 g h}}{A_{m} g} \\ \text { (technically } \Delta V & =A_{m} g\left(T_{D}-0.5 T_{R}-0.5 T_{F}\right) \cong A_{m} g T_{D} \text { for } T_{D} \gg T_{R}, T_{F}\end{aligned}

Figure 516.8-7 provides the 100 percent rebound $\Delta V$ versus drop height $h$ based upon the simple relationship $h=(\Delta V)^{2} / g$ .

h=(\Delta V)^{2} / g