混杂人
发表于 2025-3-23 11:11:36
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Lymphocyte
发表于 2025-3-23 15:53:38
Gabler Kompakt-Lexikon Logistikelop either the creative aspect or the knack of spotting weaknesses before they arise in the real object. This point is well illustrated by figure 1.1 showing a diesel engine connecting-rod design which failed in a direction that superficially seemed to be under very low stress.
反应
发表于 2025-3-23 18:43:49
Klaus Bichler,Ralf Krohn,Peter Philippicimens. How do these relate to real needs in terms of size, shape, time factor, temperature, environment and (particularly) load fluctuation? What adjustments are needed to give valid predictions of performance?
FLOUR
发表于 2025-3-23 22:30:42
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键琴
发表于 2025-3-24 05:18:38
Klaus Bichler,Ralf Krohn,Peter Philippidata and near full-size specimen tests. Weight as such is not critical. The pressure to economise, though laudable within limits, is aggravated by the custom of estimating cost for tendering purposes on a weight basis.
带伤害
发表于 2025-3-24 06:39:07
Gabler Kompakt-Lexikon Logistik need the ability to select efficient and safe structural solutions for a given duty. If we merely study analysis of standard cases we may fail to develop either the creative aspect or the knack of spotting weaknesses before they arise in the real object. This point is well illustrated by figure 1.1
狗窝
发表于 2025-3-24 14:11:11
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decode
发表于 2025-3-24 16:02:27
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antenna
发表于 2025-3-24 21:22:46
Klaus Bichler,Ralf Krohn,Peter Philippiess due to this weight is something like 40 N/mm. on top of the duty stresses due to load, inertia and curvature. When we consider tethering a weather balloon, dredging samples from the sea bed or drilling deep holes, we need to consider tailoring the rope or drill pipe to the duty in more detail.
Harrowing
发表于 2025-3-25 01:21:37
Klaus Bichler,Ralf Krohn,Peter Philippisses, deflection at the load points and very occasionally deflections elsewhere. Many students are taught to use Macaulay’s method and the three moment equation. These excellent methods have the following disadvantages: they do not aid a sense of structure, they are lengthy, errors are difficult to