Analysis of Optic and Electric Combines Measurement Uncertainty Under Strong Impact Loading

2021 ◽  
pp. 139-144
Author(s):  
Miao Zheng ◽  
Lan Wei
Keyword(s):  
Measurement Uncertainty ◽  
Impact Loading ◽  
Strong Impact

scholarly journals Theoretical model of metal gap ejection under strong impact loading and its verification

2021 ◽  
pp. 104053
Author(s):  
Jun Liu ◽  
Zhiyuan Sun ◽  
Zhengfeng Fan ◽  
Anmin He ◽  
Pei Wang
Keyword(s):  
Theoretical Model ◽  
Impact Loading ◽  
Strong Impact

scholarly journals Numerical Simulation of Spall Behavior of Metal Under Strong Impact Loading

2018 ◽  
Vol 13 ◽  
pp. 1043-1046 ◽  
Author(s):  
Zheng Miao ◽  
Yu Xin ◽  
Yin JianWei
Keyword(s):  
Numerical Simulation ◽  
Impact Loading ◽  
Strong Impact

Dynamic hardness of rock materials under strong impact loading

2020 ◽  
Vol 140 ◽  
pp. 103555
Author(s):  
Tianhan Xu ◽  
Mingyang Wang ◽  
Jie Li
Keyword(s):  
Impact Loading ◽  
Strong Impact ◽  
Dynamic Hardness ◽  
Rock Materials

Finite Element Analysis of Dynamic Responses of Plain Concrete Pavements Under Strong Impact Loading

2013 ◽  
Vol 838-841 ◽  
pp. 23-29
Author(s):  
Xiao He Zhou ◽  
Da Wei Ma ◽  
Gui Gao Le
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Failure Mode ◽  
Impact Loading ◽  
Shear Failure ◽  
Plain Concrete ◽  
Dynamic Responses ◽  
Crack Model ◽  
Strong Impact ◽  
Concrete Pavements

Plain concrete pavements under heavy impact loading will induce flexure, crack and direct shear failure. To obtain dynamic response and failure mode of plain concrete pavement under heavy impact loading, the concrete brittle crack model is adopted and finite element model of plain concrete pavements is established; the dynamic response and failure mode under heavy impact loading in different loading points and different loading times are studied; the production, stretching and extension of cracking are researched; which is a powerful reference for practical engineering application.

The influence of internal structure on wave propagation in elastic beams under impact loading

2000 ◽  
Vol 10 (PR9) ◽  
pp. Pr9-475-Pr9-480
Author(s):  
E. I. Prockuratova ◽  
C. Gearhar
Keyword(s):  
Wave Propagation ◽  
Internal Structure ◽  
Impact Loading ◽  
Elastic Beams

Trends in Periprosthetic Knee Infection and Associated Costs: A Population-Based Study Using National Data

2020 ◽  
Author(s):  
Robert Brochin ◽  
Jashvant Poeran ◽  
Khushdeep S. Vig ◽  
Aakash Keswani ◽  
Nicole Zubizarreta ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Length Of Stay ◽  
Knee Arthroplasty ◽  
Trend Test ◽  
Strong Impact ◽  
Hospitalization Costs ◽  
Teaching Status ◽  
Increasing Trend ◽  
Total Knee ◽  
Increasing Trends

AbstractGiven increasing demand for primary knee arthroplasties, revision surgery is also expected to increase, with periprosthetic joint infection (PJI) a main driver of costs. Recent data on national trends is lacking. We aimed to assess trends in PJI in total knee arthroplasty revisions and hospitalization costs. From the National Inpatient Sample (2003–2016), we extracted data on total knee arthroplasty revisions (n = 782,449). We assessed trends in PJI prevalence and (inflation-adjusted) hospitalization costs (total as well as per-day costs) for all revisions and stratified by hospital teaching status (rural/urban by teaching status), hospital bed size (≤299, 300–499, and ≥500 beds), and hospital region (Northeast, Midwest, South, and West). The Cochran–Armitage trend test (PJI prevalence) and linear regression determined significance of trends. PJI prevalence overall was 25.5% (n = 199,818) with a minor increasing trend: 25.3% (n = 7,828) in 2003 to 28.9% (n = 19,275) in 2016; p < 0.0001. Median total hospitalization costs for PJI decreased slightly ($23,247 in 2003–$20,273 in 2016; p < 0.0001) while median per-day costs slightly increased ($3,452 in 2003–$3,727 in 2016; p < 0.0001), likely as a function of decreasing length of stay. With small differences between hospitals, the lowest and highest PJI prevalences were seen in small (≤299 beds; 22.9%) and urban teaching hospitals (27.3%), respectively. In stratification analyses, an increasing trend in PJI prevalence was particularly seen in larger (≥500 beds) hospitals (24.4% in 2003–30.7% in 2016; p < 0.0001), while a decreasing trend was seen in small-sized hospitals. Overall, PJI in knee arthroplasty revisions appears to be slightly increasing. Moreover, increasing trends in large hospitals and decreasing trends in small-sized hospitals suggest a shift in patients from small to large volume hospitals. Decreasing trends in total costs, alongside increasing trends in per-day costs, suggest a strong impact of length of stay trends and a more efficient approach to PJI over the years (in terms of shorter length of stay).

National primary standard machine of Shore D hardness scale for metals and Leeb hardness scales

2020 ◽  
pp. 6-10
Author(s):  
A.E. Aslanyan ◽  
E.G. Aslanyan ◽  
S.M. Gavrilkin ◽  
A.S. Doynikov ◽  
A.N. Shchipunov
Keyword(s):  
Measurement Uncertainty ◽  
Primary Standard ◽  
Metrological Characteristics ◽  
National Primary Standard ◽  
Hardness Scale ◽  
Leeb Hardness

The article presents the results of studies to improve the National primary standard machine for hardness of metals on the shore D scale GET 161-2001, which were performed in FSUE “VNIIFTRI” from 2016 to 2018 in accordance with the technical task of Rosstandart.The improvement was carried out in order to ensure the uniformity of hardness measurements on the Leeb scales. The created new parts of the primary standard machine, which are settings for reproducing hardness numbers on the Leeb scales, are considered. Metrological characteristics of the upgraded and adopted National primary standard machine (GET 161-2019) were investigated, the budget of measurement uncertainty was calculated for reproducing hardness numbers on the Leeb scales.

Sign in / Sign up

Export Citation Format

Share Document