Results 241 to 250 of about 3,354,348 (302)
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Long-term strength of reinforced composites
Mechanics of Composite Materials, 1989A criterion of long-term strength was proposed for composite materials. The criterion can be used to calculate time to failure for arbitrary loading programs. It was shown that the criterion provides for good agreement with the experimental data not only in the cases of instantaneous and long-term static loadings, but also for fatigue loading in ...
Yu. I. Dimitrienko, I. P. Dimitrienko
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Family strengths in long-term marriages
Lifestyles, 1984Considerable interest exists in identifying the characteristics of families that exhibit a high level of functioning. Since family strengths may be related to family stability, it is logical to examine long-term marriages for characteristics of strong and durable relationships.
Robert F. MacKinnon +2 more
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Enzymatic Adaptations Consequent to Long-Term Strength Training*
International Journal of Sports Medicine, 1987The muscle enzymatic changes subsequent to 6 months of strength training followed by 3 months of detraining were examined in 21 physically active men. They were assigned either to a heavy-resistance (HR) or an explosive strength (EX) training program. Muscle biopsies were obtained from m. vastus lateralis for the assessment of activities of the enzymes
P A, Tesch, P V, Komi, K, Häkkinen
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Long-Term Strength Assessment of Postoperative Diskectomy Patients
Spine, 1989A test battery was used to measure abdominal and back muscle strength and endurance in 20 patients at least 1 year after surgical diskectomy. There were ten men and ten women. Data on isometric and isokinetic performance were compared with previously reported normal values.
N, Kahanovitz, K, Viola, M, Gallagher
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Long-term flexural strength, of glass ionomer cements
Biomaterials, 1991The flexural strength of five glass ionomers was measured at intervals ranging from 1 h to 3 months after mixing. The pattern of change in flexural strength is material-specific with two water-activated materials having significantly higher long-term flexural strengths than the others. This may be attributable to the different polyacrylic acids used or
G J, Pearson, A S, Atkinson
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Analysis of long-term strength criteria
Soviet Applied Mechanics, 1967The analysis of the durability of structural elements subjected te complex stress is an urgent problem ef modern mechanical engineering. Up to now a unified criterion of long-duration strength, enabling such analyses to be carried out for various temperature and load levels, has not been established.
V. N. Kiselevskii, V. V. Osasyuk
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Long‐term strength of ceramics for biomedical applications
Journal of Biomedical Materials Research Part B: Applied Biomaterials, 2004AbstractThe influence of slow crack growth on the initiation of radial cracks at the lower surfaces of ceramic layers bonded to polymeric substrates is studied, with particular relevance to biomechanical systems, e.g., dental crowns and hip replacement prostheses.
Yu, Zhang, Brian, Lawn
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Strengths and weaknesses of long-term bioassays
Regulatory Toxicology and Pharmacology, 1987The long-term bioassay for carcinogenic potential is a valuable tool for assessing human hazard, but suffers from severe limitations. Some of these follow directly from the use of animals as surrogates for man; others are created by study design and interpretations.
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Long Term Strength of Structural Adhesive Joints
The Journal of Adhesion, 1972Abstract The long term static strength of adhesive joints is analyzed in terms of a modified Prot method and sustained load tests. Data from the failure times under different loading rates are used to predict the static stress that an adhesive joint will withstand for an infinite time, i.e., the endurance limit.
Armand F. Lewis +2 more
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Creep and Long-Term Strength of Structures
2020The issue of evaluating strength and service life is discussed as applied to structures performance of which is characterized by multi-parametric nonstationary thermal-mechanical effects. The major degradation mechanisms of structural materials are considered. In the framework of mechanics of damaged media, a mathematical model describing the processes
Ivan Volkov +2 more
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