This chapter introduces the basics of the VDI 2230 guideline for ISO metric bolted joints to prevent potential failure modes such as embedding, clamp load loss, clamped plates crushing and slipping, bolt yielding, thread stripping, and bolt fatigue failure.
The finite element (FE) analysis is the alternative way to design and analyze the bolted structure. Introduction The Verein Deutscher Ingenieure (VDI) 2230 guideline of the The Association of German Engineers can be a useful tool for designing bolted joints in many cases, but its use is limited due to the inherent assumptions of the analytical calculation models, such as the simplified cone shape deformation model for elastic compliance of clamped plates, the empirical parameters to account for the additional bolt compliances from the head and nut, the analysis technique to reduce multibolted joints to a single-bolted joint, the model to estimate the load plane factor, and the nominal stress approach for fatigue analysis. Solid Bolt Model 508 Spider Bolt Model 510 Slipping Due to Transverse Loads Fatigue Failure 497įinite Element-Based Fatigue Analysis of Thread Bolts Design and Analysis of Metric Bolted Joints VDI Guideline and Finite Element Analysis Yung-Li Lee Chrysler Group LLCĬhapter Outline Introduction 462 Overview of Bolted Joints and Mechanical Properties 462 Estimate of a Bolt Diameter 471 Estimate of Joint Elastic Compliance (Resilience) 472 Elastic Compliance of a Bolt 473 Elastic Compliance of Clamped Plates for Concentrically Bolted Joints 475 External Loads-Load Plan Factor (n) and Load Factor (Φ)Įmbedding Effect 483 Tightening Torque 484 Assembly Preload 485 Clamped Plate Pressure 491 Minimum Thread Engagement Lengthīolt Yielding Due to Overstressing 495 Clamp Load Loss Due to Gapping 496 Thread Stripping 496 Clamped Plates Crushing Due to Excessive Pressure