Fractography of an Axle Which Broke Under Combined Bending Impact and Torsion

1994 ◽  
Vol 116 (1) ◽  
pp. 130-131
Author(s):  
Alan A. Johnson
Keyword(s):  
Rear Axle ◽  
Drive System ◽  
Fracture Surfaces ◽  
Frontal Collision

An automobile rear axle broke at the differential end when the vehicle collided with a tree at about 35 m.p.h. The fracture surfaces exhibited features characteristic of both bending impact and torsional overload. It was concluded that the fracture started as a bending impact when the frontal collision forced the entire drive system rearward. The fracture was completed by torsional overload when the drive system locked and the wheel continued to turn.

scholarly journals Rating forces grip and driving and accelerations of the car with drive different configuration

2015 ◽  
Vol 36 (1) ◽  
pp. 65-78
Author(s):  
Mariusz Kowalski
Keyword(s):  
Adhesive Strength ◽  
Driving Force ◽  
Rear Axle ◽  
Front Wheel ◽  
Drive System ◽  
Passenger Car ◽  
Wheel Drive ◽  
Drive Systems ◽  
Four Wheel Drive ◽  
Mathematical Relations

Abstract The paper shows a typical drive systems used in today's vehicles, mainly cars. Approximated scheme of the formation of the driving force of the vehicle and the necessary mathematical relations for the calculation. For example, a typical passenger car BMW 320 was analyzed and calculations obtained a driving force, of adhesion and acceleration. The calculations were performed for the drive system, the classical (i.e. the rear axle of the vehicle) for front-wheel drive and four-wheel drive (4×4). Virtually assumed that to the above mentioned vehicle it is possible buildings of each of said system. These are shown graphically in diagrams bearing a distribution of the forces acting on the substrate and the reactions - the data necessary for the calculations. The resulting calculation is graphically shown in the diagrams, in which is illustrated a change value of the resulting adhesive strength, and the acceleration depending on the drive type vehicle.

New Dimensions in Freeze-Etching

1969 ◽  
Vol 27 ◽  
pp. 202-203 ◽  
Author(s):  
Russell L. Steere ◽  
Michael Moseley
Keyword(s):  
Fracture Surfaces ◽  
Aluminum Specimen ◽  
Specimen Holder ◽  
Freeze Etching ◽  
The Right

A redesigned specimen holder and cap have made possible the freeze-etching of both fracture surfaces of a frozen fractured specimen. In principal, the procedure involves freezing a specimen between two specimen holders (as shown in A, Fig. 1, and the left side of Fig. 2). The aluminum specimen holders and brass cap are constructed so that the upper specimen holder can be forced loose, turned over, and pressed down firmly against the specimen stage to a position represented by B, Fig. 1, and the right side of Fig. 2.

Locating Al in the DABCO catalyst before and after Al extraction

1990 ◽  
Vol 48 (4) ◽  
pp. 265-267
Author(s):  
Kathleen B. Reuter
Keyword(s):  
Active Site ◽  
Inverse Relationship ◽  
Transverse Direction ◽  
Reaction Rate ◽  
Acid Phosphate ◽  
Fracture Surfaces ◽  
Al Content ◽  
Before And After ◽  
Relationship Of

The reaction rate and efficiency of piperazine to 1,4-diazabicyclo-octane (DABCO) depends on the Si/Al ratio of the MFI topology catalysts. The Al was shown to be the active site, however, in the Si/Al range of 30-200 the reaction rate increases as the Si/Al ratio increases. The objective of this work was to determine the location and concentration of Al to explain this inverse relationship of Al content with reaction rate.Two silicalite catalysts in the form of 1/16 inch SiO2/Al2O3 bonded extrudates were examined: catalyst A with a Si/Al of 83; and catalyst B, the acid/phosphate Al extracted form of catalyst A, with a Si/Al of 175. Five extrudates from each catalyst were fractured in the transverse direction and particles were obtained from the fracture surfaces near the center of the extrudate diameter. Particles were also obtained from the outside surfaces of five extrudates.

EFFICIENCY IMPROVING OF THE DRIVE SYSTEM FOR FAN INSTALLATIONS

2017 ◽  
Vol 25 (101) ◽  
pp. 9-16
Author(s):  
N., Ivanitskiy ◽  
◽  
Igor M., Kocur ◽  
Mihail I., Kotsur ◽  
D., Kravchenko ◽  
...  
Keyword(s):  
Drive System
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