Flexure Test Device:The test device

Flexure Test Device:The test device should be capable of testing in-line or bulkhead union test specimens and otherconfigurations such as elbows and tees. The rotary flexure test device may be similar to that shownin Figure 1. However, optional equipment designs may be used. Each rotary flexure test deviceshould be capable of testing one specimen, but several specimens may be tested in parallel at onetime.The device should be capable of maintaining constant pressures of up to 8000 psi in the testspecimen. The hydraulic fluid may be a system fluid such as MIL-H-5606, MIL-H-83282 or thephosphate ester fluids used in commercial jet airplanes. A typical pressurization and automaticshutdown system is shown in Figure 2. The shutdown should be automatic in the event of failure orpressure drop. The device should be capable of testing at controlled constant temperature, ifspecified by the procuring agency. The tailstock of the test device should be designed to permitalignment during initial installation and specimen mounting, and to serve as a pressure manifold. Therotating headstock should have a low-friction, self-aligning bearing and should be designed to permittotal deflections of up to 1 in and a constant rotational frequency within the range of 1500 to 3600rpm. Planar flexure machines should be capable of testing at 1500 to 8400 cpm. The base should beof rigid construction. Design suggestions are shown in Section 6.