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servohydraulic machines

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Published: 15 January 2021
Fig. 56 Example of a thermomechanical fatigue (TMF) test rig. (a) MTS servohydraulic testing machine (100 kN) equipped for TMF testing. (b) Induction-heated round specimen More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001583
EISBN: 978-1-62708-217-4
... tooling, methods, etc. The fatigue testing performed and presented within this work was accomplished in a manner that eliminated variability. One fatigue specimen was fabricated from each of the failed retaining rods (total = 6). Testing was conducted on a servohydraulic test machine with an R-value...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001056
EISBN: 978-1-62708-214-3
..., for a total thermal cycle of 47 s. By keeping the stroke constant, stiff restraints were imposed on the specimen by means of a servohydraulic universal testing machine. The stress resulting from this restraint was increased by an additional monotonic tensile stress. The applied net stress at 100 °C (212 °F...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001799
EISBN: 978-1-62708-241-9
... analysis was carried out using a scanning electron microscope (SEM) fitted with EDS and combustion type carbon/sulfur analyzer. Hardness was measured on Vicker’s Hardness tester. Service-simulated laboratory experiments were performed on servohydraulic uniaxial fatigue testing machine. Fractography...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... of lifetime prediction with the—even modified—damage-accumulation theories, the behavior of structures under variable-amplitude loading should be evaluated and verified experimentally. Tests under variable-amplitude loading should be conducted with servohydraulic or electromechanical testing equipment...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
... at the ridges and protrusions left by forming and machining operations. Gradual breakdown and lubrication failure at these spots lead to initial scoring. It is characterized by the appearance of fine scratches on the rubbing surfaces, often accompanied by the formation of transverse cracks, particularly...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
..., a closed-loop servohydraulic mechanical test machine, and suitable extensometry. A radio frequency (RF) heat source has essentially no thermal inertia and is thus ideal, assuming that the material being tested couples to RF energy. High-quality closed-loop test equipment is available from several...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... in their own right. Equipment The basic equipment required is a low thermal mass programmable furnace, a closed-loop servohydraulic mechanical test machine, and suitable extensometry. A radio-frequency (RF) heat source has essentially no thermal inertia and thus is ideal, assuming that the material...