Gradient Load Evaluation of Chassis Frame Mounted Specialised Structure Designed for Heavy Off-Road Vehicles

2016 ◽  
Vol 8 (2) ◽  
Author(s):  
V.R. Deulgaonkar
Keyword(s):  
Strain Measurement ◽  
Load Variations ◽  
The Road ◽  
Measurement And Analysis ◽  
Experimental Strain ◽  
Cross Country ◽  
Specialized Structure ◽  
Load Evaluation ◽  
Sufficient Strength ◽  
Closed Environment

Chassis mounted structures provide a levelled base to the transport vehicles intended for on-road and off-road driving. These structures acts as cushioning elements to sophisticated cargos like intelligent tracking systems placed in shelters closed environment. These structures need sufficient strength and rigidity to withstand the load variations arising from tire-road interactions during rough road travel. Such structures need special attention during the design phase itself in order to improve the specified payload carrying capacity with optimized dimensions. Present paper focuses on formulation of a specialized structure mounted on chassis intended to carry shelters. A scaled prototype is manufactured and tested for different grade-load combinations. This is done through experimental strain measurement and analysis of the results. The data is acquired for nine different load magnitudes and is categorised into three sets as low, moderate and high magnitudes. Interrelation between the stress/strain values acquired during each load and gradient state is developed. The structure behaviour is hypothesized through the gradient strain measurement outcomes. Major design concerns include the spacing and orientation of cross-members, load locations on the structure and the road profiles. Cross-country and rough road terrain behaviour of the structure is attempted in present work.

Biophysical stress analysis of restored teeth: experimental strain measurement

1988 ◽  
Vol 4 (1) ◽  
pp. 41-48 ◽  
Author(s):  
D.L. Morin ◽  
W.H. Douglas ◽  
M. Cross ◽  
R. Delong
Keyword(s):  
Stress Analysis ◽  
Strain Measurement ◽  
Experimental Strain

scholarly journals Measurement and analysis of truck vibrations during off-road transportation

2018 ◽  
Vol 211 ◽  
pp. 13003
Author(s):  
Dariusz Grzesica
Keyword(s):  
Amplitude Spectrum ◽  
Road Transportation ◽  
The Road ◽  
Rate Acceleration ◽  
Measurement And Analysis ◽  
Vehicle Security ◽  
On The Road ◽  
Vertical Vibrations ◽  
The Fourier Transform ◽  
The Impact

Measurement of vibration of the vehicle on the road surface is one of the key elements of cargo and vehicle security. This paper provides results from transporting military cargo study that analyzed the various vibrations of acceleration during transport on a stony pavement road. The data include vibrations from three directions: longitudinal, transverse and vertical. Based on collected data the quantitative analysis of vibrations was conducted. The peak acceleration as well as the acceleration level was identified. The growth rate acceleration affecting the smoothness of driving and the impact of the vehicle on the stony surface were calculated. The study shows that the greatest impact on transporting cargo have vertical vibrations. In addition, using the Fourier transform, amplitude spectrum for all directions of oscillation was assigned.

Pattern Abrasion and Other Mechanisms of Wear of Tank Track Pads

1992 ◽  
Vol 65 (1) ◽  
pp. 154-175 ◽  
Author(s):  
A. I. Medalia ◽  
A. L. Alesi ◽  
J. L. Mead
Keyword(s):  
Wear Rate ◽  
Surface Pattern ◽  
The Road ◽  
Test Conditions ◽  
Ridge Height ◽  
Standard Compound ◽  
Mode Of Failure ◽  
Cross Country ◽  
Eventual Loss ◽  
Paved Road

Abstract Wear of tank track pads has been studied under different conditions. With T142 pads tested on an M-60 tank, the mode of failure was found to depend on the test conditions. Among eighteen experimental compounds tested, improved wear (vs. the standard compound) under one test condition was generally at the expense of poorer wear under one or both of the other test conditions. However, in agreement with previous results, an HNBR/Zn-methacrylate/peroxide compound gave improved wear rate under all three test conditions. Wear of the T142 pads on a hilly cross-country course and on a combination course was generally by massive chunking. On a paved road course, most compounds wore by pattern abrasion. A few compounds worn on this course formed deep pockets parallel to the surface, resulting in the eventual loss of the large flaps between the pocket and the surface. Pattern abrasion was also found on T156 pads of four different compounds, tested on an M-1 tank on the paved road course. The abrasion patterns of both types of pads had a shingled appearance, with the ridges pitched so as to bite into the road surface. The abrasion patterns were characterized quantitatively by profilometry, using standard parameters calculated for surface roughness of metals and other materials. The ridge height and its ratio to ridge spacing correlated positively with wear rate on the paved road; whereas there was no correlation of ridge spacing with wear rate. The compounds which gave the lowest wear rate on the paved road, including the HNBR compounds, gave shallow ridges with little or no pattern.

Finite Element Analysis and Experimental Simulation of Chassis Mounted Platform for Off-Road Wheeled Combat and Transport Utility Vehicles

2018 ◽  
Vol 10 (1) ◽  
Author(s):  
V.R. Deulgaonkar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Experimental Simulation ◽  
Research Association ◽  
Element Analysis ◽  
The Road ◽  
Environmental Requirements ◽  
Experimental Strain ◽  
Development Evaluation ◽  
Vehicle Chassis

Chassis mounted platform is an intermediate component between vehicle chassis and chassis mounted shelter, and is intended to act as a levelled base for shelters. Shelters in combat vehicles provide a closed stipulated environment to computerized tracking systems, sophisticated defense combat equipments to suit the operational and environmental requirements during warhead situations. Platform carries transfers and sustains unevenness in load arising from the road or soil irregularities during off-road vehicle travel. Present work deals with development, evaluation and improvement of one such platform for 8x8 vehicles. In this work, the platform under consideration is designed to accommodate two shelters, each being secured to the platform using standard twist locking arrangements. Securing locations are dependent on the size and weight of the commodity to be placed inside shelter. Major design ruminations of the platform include nature and pattern of load, flange orientations of channel sections, span between webs of consecutive channels, axle load distribution and vehicle geometry constraints as ground clearance and departure angle. Finite element analysis is carried out in to order evaluate stress and deflection in the present platform configuration. Experimental strain measurement at critical locations on the platform is carried at Automotive Research Association of India (ARAI) to evaluate the performance of the platform under specified load-speed conditions. Relation between experimental stress values and strain gauge locations on the platform is assessed for different load magnitudes.

scholarly journals Safety Measures

2021 ◽  
Author(s):  
Laura Wiseman
Keyword(s):  
Creative Nonfiction ◽  
Safety Measures ◽  
Writing Assignments ◽  
Record Keeping ◽  
Summer Vacation ◽  
The Road ◽  
Data Points ◽  
Cross Country ◽  
On The Road ◽  
Fitness Tracker

A solo cross-country bike adventure. Safety Measures is a lyric collection of creative nonfiction and prose poetry. This creative response documents my solo cross-country 4,300-mile, 59-day bicycle ride from Anacortes, Washington, to Bar Harbor, Maine. I planned a route to begin and end in Minnesota because my family’s summer vacation was held at Leach Lake as a kid. Biking, fishing, beachcombing, and other lake events with my dad had instilled an adventurous spirit. I hoped to reconnect with the fierce energy of the young gal I once was. After the first day of support to make sure my bicycle, Lexa, worked, I rode alone for three weeks heading east. As planned, once there, my husband arrived to drive support. At Bar Harbor, we drove west, with a few bonus miles of bicycling along the way. Out west, my bicycle, Lexa, was lost, but someone found her, and she was repaired. Then I got going again towards Minnesota. Ultimately, the 59-day bicycle journey included nine days of bonus miles. For 78% or 39-days, I biked it alone with Lexa. The journey let me reflect on what it means to be a woman, self-supported, and safe. I felt scared, intimidated, and bullied. Harassment, threat, and being followed left me shaken. To be fair, nothing really happened. Sheriffs swept the road everywhere, making everyone behave. Semi-drivers scooted over, good stewards of littler riders like bicycles. Fellow bikers exchanged advice on the road ahead. I thanked, waved, or called, Safe travels, to such companionable travelers, grateful for their presence. I kept a journal during the ride, upon which this book is based. I held to writing assignments, challenges, and intentions. I collected data with a fitness tracker watch and cyclometer. Sports technology malfunction caused some rides to be recreated online. I logged this data, as well as other data points, in a spreadsheet and online. The data in this collection is based upon this record keeping.

Vibration Measurement and Spectral Analysis of Chassis Frame Mounted Structure for Off-Road Wheeled Heavy Vehicles

2016 ◽  
Vol 8 (1) ◽  
Author(s):  
V.R. Deulgaonkar
Keyword(s):  
Spectral Analysis ◽  
Spectral Density ◽  
Power Spectral Density ◽  
Dominant Frequency ◽  
Vibration Measurement ◽  
Road Transportation ◽  
The Road ◽  
Power Spectral ◽  
Cross Country ◽  
Paved Road

Chassis mounted structure is a base component for shelters or containers mounted on heavy transport vehicles. When the vehicle is driven in rough terrains or during off-road transportation this structure has a significant role in protecting the sophisticated cargo and intelligent tracking systems placed inside the shelters. During off-road transportation or warhead conditions the vehicle is subjected to large unevenness in load due to road or soil irregularities in rough terrains, which causes vibrations to be induced in the vehicle. As the nature of vibrations induced in vehicle during travel on off-road or cross-country terrains is random and unpredictable, there is a concern to analyse the vibration response of chassis and chassis mounted structures is needed. Present work deals with vibration measurement and spectral analysis of a chassis mounted structure designed for off-road and commercial transport vehicles. The road profile on which the vibration measurement has been carried out includes paved road and cross-country terrain segments. The vibration measurement has been carried at three different vehicle speeds. Signal analysis procedure for the acquired test data is discussed. The chassis mounted structure under concern is intended to hold two shelters or containers. From the vibration measurement at critical locations, g-(RMS) and g-(peak) values for paved and cross-country roads have been found out. Power spectral density values have also been found on chassis and structure for the same transport situations. Major inferences include the evaluation of minimum and maximum g-values (peak and RMS) on chassis and chassis mounted structure. Power spectral density graphs are constructed from which the dominant frequency for both road profiles is found out.

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