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Questions related from Erik Carton
For a ballistic test I am looking for a supplier of brass CuZn20 in thick plate or billet shape We need 150 mm in total thickness with sides (or diameter of 160 mm).
18 May 2020 789 4 View
Brittle materials (such as a lot of ceramics and glass) fail by a cone crack when locally impressed. In static loading a typical Herzian cone crack is formed; a ring crack starts in the tensile...
15 September 2017 8,390 0 View
Normally, metals (steels) are quite ductile and the maximal strength in tension and compression are equal (even material). However, ceramic materials are brittle and their compressive strength is...
16 May 2017 6,784 4 View
Glass is regularly hardened by thermal or chemical methods. Using a molten salt the Si ions can be exchanged by larger K or Na ions which results in a compressed outer surface of the...
22 August 2016 5,402 13 View
Would it be possible to make amorphous ceramics? We have (many) SiO2 based glass types and highly allowed metals can solidify without crystallization (Bulk Metallic Glasses), but what about...
11 February 2016 5,224 3 View
Normally the crystalline phase of a matter has a higher density compared to its liquid state (and therefore the solid phase sinks in its liquid). Ice may be an exception (as its density is lower...
05 February 2016 6,222 5 View
Would it be possible for the aluminium alloy AA6082-T651 to increase in strength/hardness over time (years)? Or are the mechanical properties stable over such long periods at room temperature storage?
18 January 2016 3,965 4 View
Compressive point loading of brittle material generates a ring crack and subsequent cone crack due to the Herzian stress distribution in the material. Are there ways to influence the cone crack...
27 October 2015 4,116 8 View
Would it be possible to manufacture 5-10 mm thick samples with a laminar microstructure comparable to that of nacre or sea shells? If so, I am interested to perform mechanical tests on such...
21 August 2015 4,547 5 View
In a closed box water can be uniaxially stressed (in compression and in tension). What is the slope of the stress versus strain curve obtained this way? This would be the Young's modulus of water...
16 June 2015 6,100 19 View
In many coastal areas maritime depositions (only 20-80 m deep) are covered by clay which provides a water-tight layer. Due to micro-biological activity in these maritime deposition layers gasses...
01 January 1970 7,210 4 View
