Results 81 to 90 of about 2,936,556 (303)
Ultrasonic Detection Method for Sealing Performance of Special Thread Tubing
Shiyou jixie, 2021 The size and distribution of contact pressure on the sealing surface of special thread tubing have an important impact on its sealing performance. In this paper, pressure was applied on the double rough surface to simulate the contact process of sealing ...
Han Ting +3 more
doaj
A method for static and dynamic load analysis of standard and modified spur gears [PDF]
, 1983 The mesh stiffness and dynamic load characteristics for several cases of the Normal Contract Ratio and High Contact ratio gearing. The considered contact ratios were grouped in the general range of 1.7,2.0, and 2.3.
Kasuba, R.
core +1 more source
Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function
FEBS Open Bio, EarlyView.We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke +4 more
wiley +1 more source
Research on Reciprocating Sealing Performance of Hydraulic Impactor Under Stress Relaxation
Shiyou jixie, 2023 Hydraulic impactors have good application effects in hard formation drilling,but the sealing performance of reciprocating seals under high-temperature and high-pressure conditions has an important influence on the service life of them.Therefore ...
Qi Yue +5 more
doaj
Asian Journal of Surgery, 2017 Background: This study aims to analyze the contact areas and pressure distributions between the femoral head and mortar during normal walking using a three-dimensional finite element model (3D-FEM).
Guangye Wang +3 more
doaj +1 more source
The optimal design of standard gearsets [PDF]
, 1983 A design procedure for sizing standard involute spur gearsets is presented. The procedure is applied to find the optimal design for two examples - an external gear mesh with a ratio of 5:1 and an internal gear mesh with a ratio of 5:1.
Coy, J. J., Savage, M., Townsend, D. P.
core +1 more source
Enzymatic and microbial routes to bioplastics: The green chemistry frontier of biopolymers
FEBS Open Bio, EarlyView.Microbial biosynthesis and engineered enzyme platforms are expanding the design space of polyhydroxyalkanoate bioplastics. By combining fermentation, PHA synthase engineering and cell‐free modular systems, tailored biodegradable polymers can be produced with tunable properties, supporting more sustainable materials and future circular bioeconomy ...
Giovanni Gallo +4 more
wiley +1 more source
BuildingsFriction pendulum bearings are widely used seismic isolation devices for bridges, with their behavior governed by friction during excitation. Sliding velocity and contact pressure are among the factors that substantially affect the friction coefficient ...
Muzaffer Borekci
doaj +1 more source
Simulation Study on Sealing Performance of Special Threaded Connector Under Vibration Conditions
Shiyou jixie, 2023 The traditional statics theory cannot effectively explain the sealing failure of special threaded connector caused by pipe string vibration.Therefore,in the paper,based on the theory of energy dissipation,considering the influence of micro contact slip ...
Yu Yang +5 more
doaj
Benchmarking Signorini and exponential contact laws for an industrial train brake squeal application [PDF]
, 2012 Contact representation of structure interactions for finite element models is nowadays of great interest in the industry. Two contact modellig strategies exist in the literature, either based on a perfect contact with no interpenetration of structures at
BALMES, Etienne +3 more
core +3 more sources