Temat: delamination test - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Experimental Tests of a Property of Composite Material Assigned for Ballistic Products
Badania eksperymentalne właściwości wytrzymałościowych kompozytów stosowanych na osłony balistyczne
Autorzy:: Czechowski, L.
Jankowski, J.
Kubiak, T.
Powiązania:: https://bibliotekanauki.pl/articles/234056.pdf
Data publikacji:: 2012
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:: materiał kompozytowy
badania eksperymentalne
próba rozciągania
testy rozwarstwienia
composite material
experimental study
tensile test
delamination test
Opis:: An empirical investigation of a selected static property of a composite is presented in this paper. For the purpose of studying the quality and property of multilayer composite material assigned for manufacturing some ballistic products, the following were conducted: tensile test, hardness test, bending test and delamination test. Before the tests were carried out, procedures were created for each of them. Selected results of the tests performed are shown and discussed.
W niniejszej publikacji przedstawiono sposób przeprowadzania badań eksperymentalnych mających na celu wyznaczanie właściwości wytrzymałościowych materiałów kompozytowych stosowanych na osłony balistyczne. W pracy omówiono próby rozciągania, twardości, zginanie i rozwarstwienia, dla których przygotowano procedury badawcze. Przedstawione i omówione wyniki badań eksperymentalnych mogą posłużyć przy projektowaniu osłon balistycznych.
Źródło:: Fibres & Textiles in Eastern Europe; 2012, 3 (92); 61-66
1230-3666
2300-7354
Pojawia się w:: Fibres & Textiles in Eastern Europe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of the Drawing Speed on the Delaminations in the Torsion Test of High-Carbon Steel Wires
Autorzy:: Suliga, M.
Powiązania:: https://bibliotekanauki.pl/articles/352585.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: drawing speed
wires
torsion test
surface delamination
Opis:: In this paper, an attempt was made to explain the causes of surface delamination in high carbon steel wires during the torsion test. For end wires with 1.7 mm diameter drawn at speeds of 5, 10, 15, 20, 25 m/s, technological tests were carried out. Then the susceptibility of the wire to plastic strain was determined. The microstructure analysis complemented the research. Analysis of the fracture torsion test showed that the wires drawn at speeds exceeding 15 m/s are delamination, which disqualify it as a material for a rope and a spring. The source of delamination in high carbon steel wires is their stronger strengthening, especially of the surface layer, which leads to a decrease in the orientation of the cementite laminaes and an increase in the degree of their fragmentation.
Źródło:: Archives of Metallurgy and Materials; 2019, 64, 2; 671-675
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Numerical simulation of fatigue delamination growth under mode I loading conditions
Autorzy:: Bajurko, P.
Czajkowska, K.
Czarnocki, P.
Szeląg, D.
Powiązania:: https://bibliotekanauki.pl/articles/247320.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: polymeric composite
fatigue delamination
numerical simulation
fatigue test
Paris-Erdogen relationship
Opis:: Delaminations are common defects that deteriorate strength of laminates. Delaminations can arise in the course of manufacturing due to faulty fabrication process or can result from low energy impacts, (e.g. FOD), that can take place in service. Once a delamination has been detected, a question will arise whether the defective component can still stay in service or should be immediately repaired or replaced. Before the decision is made, one of the factors that must be considered is a possible delamination growth rate under the expected service cyclic loading. One of the most effective tools that help to answer this question is a numerical simulation of delamination growth. Relatively easy way to simulate fatigue delamination growth under Mode I loading conditions is presented. The a=f(n) relationship was simulated. The simulation was performed with the help of FEM. The delamination extension resulted from gradual reduction in the stiffness of cohesive elements of length t that were located along the expected delamination path. It was assumed that the delamination would extend by delta a=t if the cohesive element stiffness dropped to 0. The applied degradation procedure of the initial mechanical properties of the cohesive elements was based on Paris low. For each delamination, extension increment the degradation process was limited to the cohesive element adjacent to the delamination front. In case of laminates, so far, there is no standard procedure available to determine Paris low and the one used to determine it for the purpose of the simulation performed is presented, as well. The simulation was ended when the number of cycles simulated exceeded 1000 000. The numerical results were verified against the experimental ones resulting from the four specimens tested and a satisfactory agreement was found. The difference between the a=f(n) relationship obtained by the simulation and the one being the average of the four tests was smaller than the scatter of the tests results.
Źródło:: Journal of KONES; 2012, 19, 2; 17-24
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Verification of brittle fracture criteria for bimaterial structures
Autorzy:: Mieczkowski, G.
Molski, K.
Powiązania:: https://bibliotekanauki.pl/articles/387156.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: fracture criteria
interfacial crack
delamination
experimental tests
kryteria pękania
rozwarstwianie
test eksperymentalny
Opis:: The increasing application of composite materials in the construction of machines causes strong need for modelling and evaluat-ing their strength. There are many well known hypotheses used for homogeneous materials subjected to monotone and cyclic loading conditions, which have been verified experimentally by various authors. These hypotheses should be verified also for composite materials. This paper provides experimental and theoretical results of such verifications for bimaterial structures with interfacial cracks. Three well known fracture hypotheses of: Griffith, McClintock and Novozhilov were chosen. The theoretical critical load values arising from each hy-potheses were compared with the experimental data including uni and multi-axial loading conditions. All tests were carried out with using specially prepared specimens of steel and PMMA.
Źródło:: Acta Mechanica et Automatica; 2014, 8, 1; 44-48
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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