Results 71 to 80 of about 144,997 (264)

Mechanical property variation mechanisms of granite subjected to real‐time high temperatures and subsequent cooling treatment

Deep Underground Science and Engineering, EarlyView.
This study investigates the coupled thermo‐mechanical behavior of granite during heating and cooling through a combination of laboratory tests and finite element analysis. The thermal conductivity, mineral composition, mass loss rate, micro‐crack observation, and thermal fracture characteristics of granite under various temperature conditions are ...
Rui Pang, Dehao Meng, Thomas Frühwirt, Hao Liu, Yanan Zhao, Qingyou Zhu, Wengang Dang, Mohamed Ismael, Fei Wang   +8 more
wiley   +1 more source

Effect of confining pressure on fracture characteristics and mineralogical behavior of tight sandstone specimens after hydraulic fracturing

Deep Underground Science and Engineering, EarlyView.
Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley   +1 more source

Weibull or Lognormal Distribution to Characterize Fatigue Life Scatter – Which is More Suitable? – Continued

Fatigue of Aircraft Structures
This paper describes a study to determine whether fatigue test life scatter is best characterised by a Weibull or lognormal statistical distribution for a high strength steel used for landing gear structures. It is a response to “Face 2” of the ICAF 2017
Plaskitt Rob, Wynn-Jones Chris, Halfpenny Andrew   +2 more
doaj   +1 more source

Swedish Crop Wild Relatives: towards a national strategy for in situ conservation of CWR

Genetic Resources, 2020
In 2015, the Nordic countries (Sweden, Denmark, Finland, Norway and Iceland) initiated a project to help strengthen the efforts of conservation and use of crop wild relatives (CWR) across the region. Policy recommendations that were put forward included
Jens Weibull, Jade Phillips
doaj   +1 more source

Least squares fitting the three-parameter inverse Weibull density [PDF]

, 2010
The inverse Weibull model was developed by Erto [10]. In practice, the unknown parameters of the appropriate inverse Weibull density are not known and must be estimated from a random sample.
Darija Marković, Dragan Jukić, Miljenko Marušić   +2 more
core   +2 more sources

Categorical data analysis using a skewed Weibull regression model

, 2017
In this paper, we present a Weibull link (skewed) model for categorical response data arising from binomial as well as multinomial model. We show that, for such types of categorical data, the most commonly used models (logit, probit and complementary log-
Caron, Renault, Dey, Dipak, Polpo, Adriano, Sinha, Debajyoti   +3 more
core   +2 more sources

Temperature‐dependent shear behavior and constitutive model of the rock–concrete interface

Deep Underground Science and Engineering, EarlyView.
Shear tests were conducted to investigate the temperature‐dependent shear behavior of the rock–concrete interface, highlighting the interaction between the surrounding rock and the lining during tunnel fires. Under experimental conditions, concrete exhibited greater temperature sensitivity than rock, with the shear fracture surface transitioning from ...
Hongbin Chen, Yujing Jiang, Rui Pan, Bin Wang, Sunhao Zhang, Jinge Zhang, Xianzhuang Ma   +6 more
wiley   +1 more source

Some factors affecting the longevity of Hungarian Simmental beef purposed cattle [PDF]

Journal of Central European Agriculture
The study aimed to assess the influence of herd size, age at first calving, year, month, season of first calving, and first calf sex on the longevity of Hungarian Simmental beef cattle using survival analysis. The data included 598 sires, 9,077 dams, and
Wissem BACCOURI, János POSTA
doaj   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

Dynamic Covalent Chemistry Enables Self‐Healing and Compatibilization in Polypropylene Composites

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A high‐performance polypropylene insulation material is created through dynamic covalent crosslinking. It achieves exceptional dielectric properties, autonomous self‐healing, and easy recycling, offering a sustainable solution for future HVDC transmission systems.
Hongzhe Zhang, Wenye Zhang, Wenjie Huang, Jun‐Wei Zha   +3 more
wiley   +1 more source