Analysis Only*: Loading Condition=Nonpressurized, Ultimate Design Factor=5.0
- Not applicable to ceramic structures.
- b. [FSR 33] Structural integrity of all pressurized glass and ceramics shall be verified by both analysis and proof testing.
- c. [FSR 34] Proof tests of glass and ceramics shall be configured to simulate flight-like boundary conditions and loading.
- d. [FSR 35] For glass proof testing, the total time during unload shall be as short as possible and the whole test performed in an environment designed to minimize unrealistic flaw growth.
For pressurized glass/ceramics and nonpressurized ceramics, each flight article has to be proof tested unless the requirements of section 4.6 are met. For nonpressurized glass, proof testing is required, unless the requirements of section 4.6 are met, or if the unit can demonstrate a positive margin of safety using the analysis only “Ultimate Design Factor,” as defined in Table 3.
- e. [FSR 36] All glass and ceramic bonds shall be proof tested in the bonded flight assembly.
- f. [FSR 37] The design and test factors for structural bonds in glass or ceramics shall be as specified in Table 4, Minimum Design and Test Factors for Bonds in Glass/Ceramic Structures.
| Loading Condition | Ultimate Design Factor | Proof Test Factor | |
|---|---|---|---|
| Test | Nonpressurized | 3.0 | 1.2 |
| Test | Pressurized | 3.0 | 2.0 |
| Analysis Only* | Nonpressurized | 5.0 | |
| Nonpressurized | 1.5 | 1.2 | |
| Pressurized | 3.0 | 2.0 |