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Technical Paper

Computing Remaining Fatigue Life Under Incrementally Updated Loading Histories

2018-04-03
2018-01-0623
After manufacture, every military vehicle experiences a unique history of dynamic loads, depending on loads carried, missions completed, etc. Damage accumulates in vehicle structures and components accordingly, leading eventually to failures that can be difficult to anticipate, and to unpredictable consequences for mission objectives. The advent of simulation-based fatigue life prediction tools opens a path to Digital Twin based solutions for tracking damage, and for gaining control over vehicle reliability. An incremental damage updating feature has now been implemented in the Endurica CL fatigue solver with the aim of supporting such applications for elastomer components. The incremental updating feature is demonstrated via the example of a simple transmission mount component. The damage state of the mount is computed as it progresses towards failure under a series of typical loading histories.
Video

Chassis Committee Panel: Durability Discussion for Commercial and Military Vehicles

2020-11-03
Moderator - Xiaobo Yang, Oshkosh Corporation Panelists - Mehdi Ahmadian, Virginia Tech. Neil Bishop, CAEfatigue, Ltd. Ram Iyer, ArcelorMittal This technical panel focuses on innovative and improved durability development, analysis methodologies, and problem-solving techniques in the commercial and military vehicle industry. The subjects of interest include: studies and discussion on (1) duty cycle development and customer usage correlation; (2) fatigue of metallic and non-metallic materials (3) environmental effects on fatigue performance (4) effect of manufacturing processes and operating condition uncertainties on durability performance, and (5) durability performance validation and testing methodologies.
Training / Education

FEA Beyond Basics: Nonlinear Analysis Web Seminar RePlay

Anytime
Finite Element Analysis (FEA) has been an indispensable tool for design simulation for several decades but this wide spread use has been limited to simple types of analyses. Relatively recently, more advanced analyses have given easy-to-use interfaces enabling design engineers to simulate problems formerly reserved for analysts. FEA Beyond Basics targets the FEA users who wish to explore those advanced analysis capabilities. It will demonstrate how to move past the ubiquitous linear structural analysis and solve structural nonlinear problems characterized by nonlinear material, large displacements, buckling or nonlinear connectors.
Training / Education

Ferrous Metals Bundle: Steel and Cast Iron

Anytime
Ferrous metals contain iron and are prized for their tensile strength and durability. Most are magnetic and contain a high carbon content which generally makes them, with the exception of wrought iron and stainless steel, vulnerable to rust. The following seven on-demand courses are included in the Ferrous Materials Bundle: Steel and Cast Iron. Each course is approximately one-hour in duration. See Topics/Outline for additional details.
Training / Education

Polymers Bundle

Anytime
Polymers are thermoplastic, meaning that once the polymer is formed, it can be heated and reformed repeatedly. Both synthetic and natural polymers play an essential role because of their broad range of properties. Polymers are relatively low-cost and allow for a wide range of characteristics and colors. Polymers can be both thermal and electrical insulators and very resistant to chemicals. The following five on-demand courses are included in the Polymers bundle. Each course is approximately one-hour in duration. See Topics/Outline for additional details.
Training / Education

Introduction to Materials Bundle

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The following six on-demand courses are included in the Introduction to Materials bundle. Each course is approximately one-hour in duration. See Topics/Outline for additional details. Introduction to Physical Properties This course provides an an overview of manufacturing materials and their physical properties, including thermal, electrical, and magnetic properties and introduces volumetric characteristics, such as mass, weight, and density.
Training / Education

Nonferrous Metals Bundle

Anytime
Nonferrous materials are malleable, are non-magnetic, and have no iron content which gives them higher resistance to rust and corrosion. The following five on-demand courses are included in the Nonferrous Metals bundle. Each course is approximately one-hour in duration. See Topics/Outline for additional details. Introduction to Physical Properties This course provides an an overview of manufacturing materials and their physical properties, including thermal, electrical, and magnetic properties and introduces volumetric characteristics, such as mass, weight, and density.
Training / Education

High Temperature Materials Bundle

Anytime
Metals and alloys all have different melting ranges depending on their chemistry. High temperature metals are much harder at room temperature, have exceptionally high melting points (usually above 2000 degree Celsius), and are resistant to wear, corrosion and deformation. The following five on-demand courses are included in the High Temperature Materials bundle. Each course is approximately one-hour in duration. See Topics/Outline for additional details.
Training / Education

Metals Bundle

Anytime
Almost 75% of all elements are metals. Metals can be classified as either ferrous or non-ferrous and generally conduct electricity and heat well. Most metals are malleable and ductile and are, in general, heavier than other elemental substances.The following six on-demand courses are included in the Materials bundle. Each course is approximately one-hour in duration. See Topics/Outline for additional details.
Training / Education

Fundamentals of Fatigue Analysis

Fatigue is a structural failure mode that must be recognized and understood to develop products that meet life cycle durability requirements. In the age of lightweighting, fatigue strength is an important vehicle design requirement as engineers struggle to meet stringent weight constraints without adversely impacting durability. This technical concept course introduces the fatigue failure mode and analysis methods. It explains the physics of material fatigue, including damage accumulation that may progress to product failure over time, and it provides the needed foundation to develop effective fatigue prediction capabilities.
Training / Education

Fluids for Aerospace Hydraulic Systems

This four-hour short course provides an introduction to fluids for aerospace hydraulic systems. Topics covered include an introduction to basics fluid properties, rheology, tribology, and fluid product development. In addition, the history and performance of different classes of fluids are discussed in detail, and specific failure modes such as erosion and sludge formation will be described. Along with an introduction to fluid degradation, information on used oil analysis test methods and interpretation will be provided.
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