Standard Test Methods and Performance Standards for Synthetic Turf Playing Surfaces and Materials

To improve the comfort of agricultural workers, a T-shirt with a printed active cooling finish was evaluated to determine if it would meet the wash life durability and performance expectations of such an arduous application. Six shirts with a printed phase change material (PCM) finish and six shirts without (control) were washed 50 times to replicate a typical consumer wash life. Shirts were evaluated for absorbency, dimensional change, colorfastness, crocking, abrasion resistance, soil release, and smoothness retention according to AATCC and ASTM standard test methods. Testing was conducted before laundering and after 1, 5, 10, 20, 30, 35, 40, 45, and 50 consumer laundry (CL) cycles. Absorbency and dimensional change were significantly influenced by the PCM finish. Results demonstrate the appropriateness of adopting such a finish technology for agricultural worker clothing applications.

Download Full-text

Test Methods for Steel Foothold Traps: Criteria and Performance Standards

Vertebrate Pest Control and Management Materials: 5th Volume ◽

10.1520/stp26181s ◽

2009 ◽

pp. 148-148-11 ◽

Cited By ~ 2

Author(s):

SB Linhart ◽

RG Linscombe

Keyword(s):

Performance Standards ◽

Test Methods ◽

And Performance

Download Full-text

Rolling bearing performance rating parameters: Review and engineering assessment

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406220911395 ◽

2020 ◽

Vol 234 (15) ◽

pp. 3064-3077

Author(s):

Guillermo E Morales-Espejel ◽

Antonio Gabelli

Keyword(s):

Numerical Study ◽

Performance Standards ◽

Limit Load ◽

Rolling Bearing ◽

Test Methods ◽

Standard Test ◽

Performance Rating ◽

Rolling Bearings ◽

Endurance Testing ◽

Load Ratings

The choice of a rolling bearing for a particular application relies on performance rating parameters as the static, the dynamic, and the fatigue limit load of bearings. The values of these parameters define the calculated performance of the bearing. Endurance testing of high-quality rolling bearings has been used for the development of rolling bearing performance standards like the ISO 281 and ISO 76 that are commonly used throughout the industry. However, standard test methods for the measurement and validation of load ratings of rolling bearings are not available in the standards. This leads to the undifferentiated use of the “status of the art” standardized performance to the very large variety of rolling bearing types and qualities that are produced today. The current paper revisits the origin, definition, and development of rolling bearing performance parameters. A numerical study for the determination process of bearing load ratings is carried out. The results are compared with standardized values and values quoted by bearing manufacturers. This provides an overview of the load rating practices that are in use. The limitations and possible improvements of the present methodology are discussed.

Download Full-text

Correlations between mechanical and geometrical parameters in aggregates: a tool for quality assessment and control

Bulletin of the Geological Society of Greece ◽

10.12681/bgsg.11091 ◽

2013 ◽

Vol 47 (4) ◽

pp. 2069 ◽

Cited By ~ 1

Author(s):

D. Xirouchakis

Keyword(s):

Abrasion Resistance ◽

Shape Index ◽

Test Methods ◽

Standard Test ◽

Geometrical Parameters ◽

Strongly Correlated ◽

Data Set ◽

Resistance To Wear ◽

And Performance ◽

And Control

Correlations between mechanical and geometrical parameters in aggregates can be used as quality and performance prediction tools. I evaluated the following parameter pairs: dry and wet resistance to wear (MDE & MDS), and resistance to fragmentation (LA); polishing resistance and abrasion (PSV–AAV); and flakiness and shape index (FI–SI). The data set comprises slags, sedimentary, igneous, and metamorphic rocks tested according to EN standard test methods. FI and SI are positively correlated (r = 0.83) and can be well described by the 1:1 line. Wet and dry resistance to wear are strongly correlated (r = 0.98) with MDE ≈ 2·MDS. Dry resistance to fragmentation (LA) and wet resistance to wear (MDE) are well correlated (r = 0.81), and can be described with the equation LA = 4.95×MDE 0,61 (R2 = 0.69). According to the PSV–AAV correlation, aggregates are divided into two groups with contrasting behavior. Limestones and slags (r = −0.49 to −0.69) exhibit high polishing for high abrasion resistance (high PSV–low AAV), whereas sandstones and mafic to intermediate volcanics (r = 0.44 to 0.39) exhibit high polishing for low abrasion resistance (high PSV–high AAV). Peridotites belong to either PSV–AAV group depending on the soft minerals.

Download Full-text