Superposition of Potential Chemical Polluants and Radioisotopes and Their Influence Upon the Environment and Living Organisms

Jinescu, Valeriu V.; Manea, Simona Eugenia; Jinescu, George; Nicolof, Vali Ifigenia

doi:10.37358/rc.17.9.5853

Cited by 3 publications

(5 citation statements)

References 6 publications

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“…This method of calculating the strength of cracked mechanical structures has been applied to many cases of mechanical stresses [5-8; 11-18]. The superposition of loads of the same nature or of a different nature proved to be possible only on the basis of the relations obtained through the use of the principle of critical energy [19][20][21][22][23][24][25][26][27][28][29][30].…”

mentioning

confidence: 99%

Critical Stresses in Materials with Cracks

Manea¹,

Nicolof²,

Sima³

2019

Rev. Chim.

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The fracture mechanics concepts, as well as the concepts introduced on the basis of principle of critical energy, correlated with strength of materials with cracks is analysed. The equivalent stress method of strength was applied to cracked materials, by using the concept of local critical stress. This one depends on the material behavior and the deterioration due to crack. Experimental results have been obtained with specimens of OL304 steel with different cracks. The influence of crack depth and crack width is put into evidence.

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confidence: 99%

Critical Stresses in Materials with Cracks

Manea¹,

Nicolof²,

Sima³

2019

Rev. Chim.

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“…The calculation of the damage of the tubular specimens to static loading, depending on the geometry and the position of the crack, was determined according to [19].…”

Section: A) Study Of Hot Plastic Deformability By Hot Compressionmentioning

confidence: 99%

Study Deformability Ecological Steel (41Cr4)

Rusănescu¹,

Rusănescu²,

Anghelina³

et al. 2018

Mat.Plast.

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In this paper is studied the hot plastic deformability (plasticity and resistance to deformation) for the low-alloyed steel of heat treatment for mechanical engineering in two ways: compression and tension. Groups of low alloy steels is very important in terms of quality and quantity, the products of these steels have developed internal and external market. The plasticity variation were plotted with the temperature and it was established that the plasticity of the steel increases in the range 700-12000C, then decreases as a result of the firing of the grain boundaries, for the bars obtained from ingot and continuous cast blown it was noticed that the plasticity values are very close. Deformation resistance decreases as the temperature increases. The finest granulation was obtained for a final plastic deformation temperature of 8000C and a minimum degree of deformation of 45%.

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“…In the case of living organisms, critical participation has the expression [9], (3) where shows that the native critical participation (at t=0) which may take values between P cr,min (0) and P cr,max (0), where P cr,min (0) correspunds to a body with low (minimum) genetic resistance while P cr,max (0) correspunds to a body that was genetically endowned with very high (maximum) resistance to aggressions.…”

Section: B Critical Participationmentioning

confidence: 99%

“…1b b. The critical participation is calculated with relation (3), where, for organisms with exceptional physical and psychological resistance, one may consider P cr (0)=1.…”

Section: The Total Participation Of Specific Energy and Critical Part...mentioning

confidence: 99%

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State of the Body Evaluation on the Basis of Principle of Critical Energy

Jinescu¹,

Jinescu²

2018

Rev. Chim.

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An analysis is made of the body internal and external factors that might affect its general condition. This is the starting point that can make it possible to further decide on the risk of surgery. The stresses that a body is likely to undergo may be divided into two categories: - stresses that are externally applied to the body (traumatic injuries, surgery ...); - stresses resulting in an internal effect upon body resistance (damage caused by external and / or internal factors, medical treatments ...), plus the effect of the body adaptive self-adjustment. One resorts to the concepts introduced by the principle of critical energy, namely, the specific energy participation of external stresses and the critical participation, non-dimensional variables, dependent on the behavior of the organism under different stresses. By comparing the values of these concepts, calculated for a patient, one can decide on the risk of one or more successive surgeries over a short period of time. The theoretical results obtained applied to several cases demonstrate the actual implementation of the proposed calculation method and its great practical advantage.

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Superposition of Potential Chemical Polluants and Radioisotopes and Their Influence Upon the Environment and Living Organisms

Cited by 3 publications

References 6 publications

Critical Stresses in Materials with Cracks

Critical Stresses in Materials with Cracks

Study Deformability Ecological Steel (41Cr4)

State of the Body Evaluation on the Basis of Principle of Critical Energy

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