Numerical and experimental investigations on the failure mechanism of the suction valve in the refrigerator compressor under unconventional conditions

2020 ◽  
Vol 117 ◽  
pp. 44-51
Author(s):  
Xiang Yin ◽  
Jianmin Fang ◽  
Feng Cao ◽  
Zhonghua Chen ◽  
Xiaolin Wang
Keyword(s):  
Failure Mechanism ◽  
Experimental Investigations

Experimental investigations on the failure mechanism and self-sharpening of a graded tool

2019 ◽  
Vol 23 (4) ◽  
pp. 511-529 ◽  
Author(s):  
Guangming Zheng ◽  
Xiang Cheng ◽  
Li Li ◽  
Jun Zhao ◽  
Guoyong Zhao ◽  
...  
Keyword(s):  
Failure Mechanism ◽  
Experimental Investigations

Model investigation of the performance of single anchors and groups of anchors

1994 ◽  
Vol 31 (2) ◽  
pp. 273-284 ◽  
Author(s):  
Ashraf Ghaly ◽  
Adel Hanna
Keyword(s):  
Failure Mechanism ◽  
Load Distribution ◽  
Dense Medium ◽  
Unit Weight ◽  
Experimental Investigations ◽  
Experimental Setup ◽  
Uplift Capacity ◽  
Sand Surface ◽  
Pullout Load ◽  
Upward Displacement

Experimental investigations on the performance of single and groups of vertical screw anchors installed in dense, medium, and loose sands are presented. An experimental setup was instrumented to allow the measurement of the total pullout load, upward displacement, sand surface deflection, and stress development in the sand layer during all phases of testing. A sand placing technique was developed and utilized over all the testing program to ensure reproducibility of the predetermined unit weight. Stresses measured within sand deposits indicated that the tested sands were overconsolidated due to the application of mechanical compaction. Special tests were conducted on colored–layered sand to define the nature of the failure mechanism. The results of these tests, together with the measurements of the deflection of the sand surface, were employed to establish the shape of the rupture surface which could be represented by a segment of a logarithmic spiral. Groups of three, four, six, and nine anchors were tested in this investigation. The effect of installation depth, spacing between anchors, and sand characteristics on the ultimate pullout load of the group was examined. The experimental setup was instrumented to allow the measurement, of the total pullout load of the group as well as that of individual anchors in the group. Load distribution among the anchors of a group is discussed in terms of anchor location and the applied load level. At failure, all anchors contribute almost equally to the uplift capacity. Group efficiencies were calculated and compared. An installation procedure was proposed to avoid differential upward displacement during the uplifting process and to provide uniform load distribution on the different anchors of the group. Key words : anchors, failure mechanism, group action, model tests, sand, uplift capacity.

Influences of the Facing Edge Condition on the Flank Load Carrying Capacity of Helical Gears

2015 ◽  
Author(s):  
Daniel Kadach ◽  
Peter Matt ◽  
Thomas Tobie ◽  
Karsten Stahl
Keyword(s):  
Failure Mechanism ◽  
Carrying Capacity ◽  
Edge Condition ◽  
Experimental Investigations ◽  
Theoretical Studies ◽  
Load Carrying Capacity ◽  
Research Projects ◽  
Helical Gears ◽  
Load Carrying ◽  
Tooth Flank

This paper presents the main results of the performed experimental investigations and theoretical studies carried out to investigate the main parameters affecting facing edge tooth flank fracture damages of case carburized helical gears. These facing edge tooth fractures were observed in different industrial gearbox applications as well as within several experimentally based research projects on the pitting load carrying capacity of case hardened gears. The crack origin of these unexpected tooth flank fractures was found to be in the area of the acute facing edge. As a part of a special research project extensive experimental and test-accompanying investigations as well as theoretical studies were carried out to investigate the main parameters affecting facing edge tooth flank fractures. The herein found failure mechanism is discussed in detail. Finally, recommendations to avoid gear facing edge tooth flank fractures are given in order to optimize the gear load carrying capacity.

On the role of tin underlays for the prevention of thermal grooving in thin gold films

1986 ◽  
Vol 44 ◽  
pp. 732-733
Author(s):  
Jin Young Kim ◽  
R. E. Hummel ◽  
R. T. DeHoff
Keyword(s):  
Thin Film ◽  
Free Surface ◽  
Grain Boundary ◽  
Beneficial Effect ◽  
Failure Mechanism ◽  
Failure Mechanisms ◽  
Distinct Advantage ◽  
Gold Films ◽  
Gold Thin Film

Gold thin film metallizations in microelectronic circuits have a distinct advantage over those consisting of aluminum because they are less susceptible to electromigration. When electromigration is no longer the principal failure mechanism, other failure mechanisms caused by d.c. stressing might become important. In gold thin-film metallizations, grain boundary grooving is the principal failure mechanism.Previous studies have shown that grain boundary grooving in gold films can be prevented by an indium underlay between the substrate and gold. The beneficial effect of the In/Au composite film is mainly due to roughening of the surface of the gold films, redistribution of indium on the gold films and formation of In2O3 on the free surface and along the grain boundaries of the gold films during air annealing.

Experimental investigations of the use of cartilage in tympanic membrane reconstruction

2000 ◽  
Vol 21 (3) ◽  
pp. 322-328 ◽  
Author(s):  
T ZAHNERT ◽  
K HUTTENBRINK ◽  
D MURBE ◽  
M BORNITZ
Keyword(s):  
Tympanic Membrane ◽  
Experimental Investigations

EXPERIMENTAL INVESTIGATIONS OF THE QUANTUM PHOTOVOLTAIC EFFECT IN InAs-GaSb SEMICONDUCTOR SUPERLATTICES

1987 ◽  
Vol 48 (C5) ◽  
pp. C5-183-C5-186
Author(s):  
J. BLEUSE ◽  
P. VOISIN ◽  
M. VOOS ◽  
L. L. CHANG ◽  
L. ESAKI
Keyword(s):  
Photovoltaic Effect ◽  
Experimental Investigations ◽  
Semiconductor Superlattices
Sign in / Sign up

Export Citation Format

Share Document