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Charpy impact test
About: Charpy impact test is a research topic. Over the lifetime, 6591 publications have been published within this topic receiving 76917 citations.
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TL;DR: In this article, it was shown that the J-integral can be directly evaluated from single load-displacement records for a series of crack toughness specimens having the common feature that their only significant length dimension is that of the uncracked ligament.
Abstract: It is shown that the J-integral can be directly evaluated from single load-displacement records for a series of crack toughness specimens having the common feature that their only significant length dimension is that of the uncracked ligament. For the special case of bending loads on the ligament of a deeply cracked bar, J is shown to be twice the work of deformation divided by the ligament area. This and like results are employed to discuss Charpy and 'equivalent energy' toughness measures and also to evolve yet simpler estimating procedures for the J-integral.
560 citations
TL;DR: In this paper, a ductile phase containing bulk metallic glass composites is prepared via an in situ method by rapid quenching of a homogenous Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5 melt.
447 citations
TL;DR: In this article, a composite system consisting of SiC yarn reinforced lithium aluminosilicate (LAS) glass-ceramic, containing ZrO2 as the nucleation catalyst, has been found to be reproducibly fabricated into composites that exhibit exceptional mechanical and thermal properties to temperatures of approximately 1000° C.
Abstract: Silicon carbide fibre reinforced glass-ceramic matrix composites have been investigated as a structural material for use in oxidizing environments to temperatures of 1000° C or greater. In particular, the composite system consisting of SiC yarn reinforced lithium aluminosilicate (LAS) glass-ceramic, containing ZrO2 as the nucleation catalyst, has been found to be reproducibly fabricated into composites that exhibit exceptional mechanical and thermal properties to temperatures of approximately 1000° C. Bend strengths of over 700 MPa and fracture toughness values of greater than 17 MN m−3/2 from room temperature to 1000° C have been achieved for unidirectionally reinforced composites of ∼ 50 vol% SiC fibre loading. High temperature creep rates of 10−5 h−1 at a temperature of 1000° C and stress of 350 MPa have been measured. The exceptional toughness of this ceramic composite material is evident in its impact strength, which, as measured by the notched Charpy method, has been found to be over 50 times greater than hot-pressed Si3N4.
446 citations
01 Nov 2005
TL;DR: In this article, the authors present the results of the 23rd SOFT Conference, Venice, Italy (2004) Reference CRPP-CONF-2005-006 Record created on 2008-05-13, modified on 2017-05/12
Abstract: Note: Proc. 23rd SOFT Conference, Venice, Italy (2004) Reference CRPP-CONF-2005-006 Record created on 2008-05-13, modified on 2017-05-12
424 citations
TL;DR: In this article, a combined molding process with abaca and man-made cellulose fibres was used to improve the E-Modulus and tensile strength of PLA/abaca.
Abstract: PLA biocomposites with abaca and man-made cellulose fibres were processed by using combined moulding technology: two-step extrusion coating process and consecutively injection moulding. By adding 30 wt% of man-made cellulose, the Charpy impact strength at ambient temperature increased by factor 3.60, compared to unreinforced PLA. Tensile strength rose by factor 1.45 and stiffness by approx. 1.75. Reinforcing with abaca fibres (30 wt%) enhanced both E-Modulus and tensile strength by factor 2.40 and 1.20, respectively. The Charpy A-notch impact resistance of PLA/abaca could be improved by factor 2.4. SEM photographs show fibre pull-outs from the polymer matrix. The fibre orientation was analysed via optical microscopy. The after-process fibre length was significantly affected already during compounding process.
335 citations