VEREIN DEUTSCHER INGENIEURE Systematische Berechnung hochbeanspruchter Schraubenverbindungen Zylindrische Einschraubenverbindungen Systematic calculation of highly stressed bolted joints Joints with one cylindrical bolt VDI 2230 Blatt 1 / Part 1 Ausg. Deutsch/englisch Issue German/English VDI-Handbuch Produktentwicklung und Konstruktion. In the Guideline VDI 2230 Part 1, bolted joints are treated which have to transmit constant or alternating working loads and which are designed with high duty bolts. A bolted joint is a separable joint between two or more components using one or more bolts. The bolts must be designed such that the joined section.

An English translation (effectively) of the current VDI 2230 version can be found in Bickford and Nassar, Handbook of Bolts and Bolted Joints, Dekker, 1998, Chapter 18, p. 317, written by SPS Technologies, Inc., Engineered Products Group, Cleveland, Ohio, USA.

VDI 2230 covers in-depth analysis of a single bolt in tension, not analysis of bolt patterns nor bolts subjected to shear. I'm told the new English version of VDI 2230, when it's available, will cost approximately US$200. RE: VDI 2230, 2001 edition English translation (Materials). Good point regarding the summary provided by Alex Heston in the Handbook. However, his useful 23 page summary is not a good substitute for the 83 page original.

The Handbook's cost is US$195 - while it covers many topics not covered by VDI 2230, I believe that VDI 2230 is the best value for fastening information. Regarding 'single bolt in tension', that is the focus of VDI 2230. However, there is a limited treatment in VDI 2230 for multi-bolted joints, and there are techniques to reduce patterns into a single bolted joint. When you say bolts subjected to shear, do you mean shear-bearing where the fastener itself is sheared, or shear-friction where the joint must resist shear loads. The latter is handled by VDI 2230, and the former really doesn't have much extra to calculate other than the actual cross-sectional area at the shear plane to calculate the ultimate shear force. While we are discussing information sources, in addition to the two excellent one mentioned above, two other 'must-haves' are the ASTM Special Technical Publications 1236 and 1391, Structural Integrity of Fasteners. Does anyone have others that have the depth shown in the 4 items?

RE: VDI 2230, 2001 edition English translation (Structural) 23 Sep 02 11:44. Thanks for correcting me on that, CoryPad. Sounds like it will be an excellent source and worth the price. By 'shear,' I was referring to transverse shear in general. Even for bearing-type connections, when threads are in shear plane, the bolt cross-sectional area used in analysis is somewhat in contention among various sources. Most sources claim, in this case, transverse shear area As = bolt tensile stress area At, some sources say As = about 0.80*At, or (conservatively) even 0.70*At, and a few sources somewhat nebulously infer As = bolt minor diameter area Am. Hopefully obtaining VDI 2230 will also resolve that matter.

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Plus the friction-type connection guidelines will be very helpful. And I see it also covers axial thread shear (stripping).

Thanks for the info.

The following table shows the values of torque and preload at minimum yield strength for the thread sizes M4 up to M68. Torque and preload for one thread size you can see one below each other for the property classes 8.8, 10.9 and 12.9. Five columns with values of torque and preload are shown for the different friction coefficients 0,08 - 0,10 - 0,12 - 0,15 - 0,18. Considered in the given values is the torsion stress generated by the thread friction µ-th. Because the yield values of torque and preload are given, in case of a torque controlled tightening the real assembling torque values must remain below this value! Assembling torque = 80%.