Results 1 to 10 of about 478,703 (164)
Changes in Dynamic Strength Index in Response to Strength Training [PDF]
Sports, 2018 The primary aim of this investigation was to determine the effects of a four-week period of in-season strength training on the dynamic strength index (DSI). Pre and post a four-week period of strength-based training, twenty-four collegiate athletes (age =
Paul Comfort +5 more
doaj +6 more sources
A review of the research on the VHCF test technology for aero-engine typical materials
Hangkong gongcheng jinzhan, 2023 As the most critical and core part of the aircraft, the aero-engine has been serving in extreme environ-ment such as high temperature and high load for a long time. Fatigue failure is one of the main causes of engine structure failure.
WANG Zhaohan +5 more
doaj +1 more source
Bernoulli-Euler Beam Unsteady Bending Model with Consideration of Heat and Mass Transfer [PDF]
Journal of Applied and Computational Mechanics, 2023 The article describes the problem of unsteady vibrations of a Bernoulli-Euler beam taking into account the relaxation of temperature and diffusion processes. The initial mathematical model includes a system of equations for unsteady bending vibrations of
Andrei Zemskov +2 more
doaj +1 more source
A Review of the Research on the Test Technology of Aircraft Engine Blade-casing Rub-impact
Hangkong gongcheng jinzhan, 2020 The static rotor rub-impact problem is one of the main reasons of vibration over-standard failure during transition mode of engine. In order to carry out more effective assessment verification and analysis, the current domestic and abroad research status
MU Qinqin, XU Jian
doaj +1 more source
International Journal of Mechanical System Dynamics, 2022 High‐speed maglev trains are subjected to severe dynamic loads, thus posing a failure hazard. It is necessary to account for the vehicle dynamics to improve the structural strength and fatigue life assessment approach under harsh routes and super high ...
Feng Guo +5 more
doaj +1 more source
Dynamic properties of undisturbed sand in deep overburden of a dam foundation
Yantu gongcheng xuebao, 2023 The ultra-deep overburden foundation is a great challenge for the construction of water conservancy and hydropower projects. The dynamic mechanical properties of overburden soil are the basis for discriminating liquefaction of foundation soil and ...
YU Yanyang 1, PENG Wenming 2, LI Jian 2, LUO Qixun 2, MA Fulong 2, CHEN Cong 3, LIU Enlong 1
doaj +1 more source
Dynamic responses of calcareous foundation reinforced by microbially induced calcite precipitation
Yantu gongcheng xuebao, 2023 The microbially induced calcite precipitation (MICP) is a green and ecofriendly technique to efficiently improve soil strength and mitigate liquefaction potential of soil.
XIAO Peng 1, 2, LIU Hanlong 1, 3, SHI Jinquan 1, 3, HE Xiang 1, 3, CHU Jian 4, XIAO Yang 1, 3
doaj +1 more source
The strength and deformability of cement stone and powder-activated concrete. Part I [PDF]
Нанотехнологии в строительствеIntroduction. During the operation of buildings and structures, reinforced concrete structures are subject to various loads that can cause deformation and destruction.
Irina V. Erofeeva +5 more
doaj +1 more source
Applied Sciences, 2020 Reinforced concrete (RC) structures typically present brittle failures by shear or punching under impact loading. High-performance fiber-reinforced concrete (HPFRC) has great potential due to its superior strength and energy absorption.
Carlos Zanuy, Gonzalo S.D. Ulzurrun
doaj +1 more source
Dynamic behaviors of MICP-treated calcareous sand in cyclic tests
Yantu gongcheng xuebao, 2018 The calcareous sands from an island of the South China Sea are cemented by the microbially induced calcite precipitation (MICP) method. A series of cyclic tests and SEM tests are carried out to investigate the evolutions of the dynamic strength, dynamic ...
LIU Han-long 1,2,3, XIAO Peng 1,2, XIAO Yang 1,2, WANG Jian-ping 4, CHEN Yu-min 3, CHU Jian 1
doaj +1 more source