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Viewing 1 to 30 of 3241
2017-04-04
Event
This session presents the latest developments in automotive applications of wrought products. The papers cover a wide range of the technical aspects including alloy development, lightweight design, process development and simulation as well as performance optimization.
2016-09-27
Journal Article
2016-01-2126
Ali Mohamed Abdelhafeez, Sein Leung Soo, David Aspinwall, Anthony Dowson, Dick Arnold
Despite the increasing use of carbon fibre reinforced plastic (CFRP) composites, titanium and aluminium alloys still constitute a significant proportion of modern civil aircraft structures, which are primarily assembled via mechanical joining techniques. Drilling of fastening holes is therefore a critical operation, which has to meet stringent geometric tolerance and integrity criteria. The paper details the development of a three-dimensional (3D) finite element (FE) model for drilling aerospace grade aluminium (AA7010-T7451 and AA2024-T351) and titanium (Ti-6Al-4V) alloys. The FE simulation employed a Coupled Eulerian Lagrangian (CEL) technique. The cutting tool was modelled according to a Lagrangian formulation in which the mesh follows the material displacement while the workpiece was represented by a non-translating and material deformation independent Eulerian mesh.
2016-08-15
Standard
AMSB20148C
This specification covers aluminum alloy brazing sheet for use in brazed aluminum joints.
2016-07-21
Standard
AMS4359
This specification covers an aluminum alloy in the form of extruded rods, bars, and profiles (shapes) 0.040 to 1.500 inches (1.02 to 38.10 mm), inclusive, in thickness, and produced with maximum cross sectional area of 23.25 in2 (15000 mm2) and a maximum circumscribing circle diameter (circle size) of 15.5 inches (394 mm) (see 8.4.1).
2016-07-13
WIP Standard
AMS4367
This specification covers an aluminum alloy in the form of extruded rods, bars, and profiles (shapes) produced with maximum cross sectional area of 55.5 in2 (35 806 mm2) and a maximum circumscribing circle diameter (circle size) of 24.4 inches (620 mm) (see 8.4.1)
2016-07-13
WIP Standard
AMS4374
This specification covers an aluminum alloy in the form of extruded rods, bars, and profiles (shapes) produced with maximum cross sectional area of 56.1 square inches (36 193 mm2) and a maximum circumscribing circle diameter (circle size) or 20.2 inches (513 mm)
2016-06-16
Standard
AMS4045L
This specification covers an aluminum alloy in the form of sheet and plate 0.008 to 4.000 inches, incl (0.20. to 101.6 mm, incl) in thickness (see 8.4).
2016-06-16
Standard
AMS4048P
This specification covers an aluminum alloy in the form of sheet and plate 0.008 to 1.000 inch, incl (0.20 to 25.40 mm, incl) in thickness, clad on two sides, supplied in the annealed (O) condition. When specified, product shall be supplied in the “as fabricated” (F) temper (see 8.4).
2016-06-16
Standard
AMS4049M
This specification covers an aluminum alloy in the form of sheet and plate with thickness from 0.008 to 4.000 inch, incl (0.20 to 101.6 mm, incl), clad on two sides (see 8.4).
2016-06-07
Standard
AMS4899D
This specification covers a titanium alloy in the form of sheet, strip, and plate up through 4.000 inches (101.60 mm), inclusive.
2016-06-06
Standard
AMS4357
This specification covers an aluminum alloy in the form of die forgings from 2 inches (50.8 mm) to 10 inches (254 mm) in nominal thickness and forging stock of any size (see 8.5).
2016-06-02
Standard
AMS2355L
This specification covers quality assurance sampling and testing procedures used to determine conformance to applicable specification requirements of wrought aluminum alloy and wrought magnesium alloy mill products (except forging stock), and includes quality assurance and testing procedures for rolled, forged, and flash welded rings (see 8.3). Requirements are specified in inch/pound units.
2016-05-17
Standard
AMS4321B
This specification covers an aluminum alloy in the form of die forgings, hand forgings, and forging stock.
2016-05-16
Standard
AMS2409H
This specification covers the engineering requirements for producing a thin tin coating on aluminum alloys by an immersion process.
2016-05-11
Standard
AMS4244C
This specification covers an aluminum alloy in the form of two types of welding wire.
2016-05-11
Standard
AMS4189J
This specification covers an aluminum alloy in the form of welding wire.
2016-05-10
Standard
AMS4149E
This specification covers an aluminum alloy in the form of die and hand forgings 6.000 inches (152.00 mm) and under in nominal thickness at time of heat treatment (see 8.5).
2016-05-10
Standard
AMS4327A
This specification covers an aluminum alloy in the form of plate 0.250 to 0.300 inches (6.35 to 7.62 mm), inclusive, in thickness (see 8.6).
2016-04-19
Standard
AMS2772G
This specification covers requirements and recommendations for the heat treatment of wrought aluminum alloy raw materials (see 8.2.1) by producers. It supersedes AMS-H-6088 and replaces MIL-H-6088.
2016-04-13
WIP Standard
D16AB
This specification covers an aluminum alloy in the form of plate from 3.000 to 8.000 inches (76.2 to 203.2 mm) in thickness
2016-04-11
Standard
AMS4298A
This specification covers an aluminum alloy in the form of sheet 0.063 to 0.236 inch (1.60 to 6.00 mm), incl, in thickness, clad on both sides (see 8.4).
2016-04-07
Standard
TS251AR-2
No scope available.
2016-04-07
Standard
TS251-2
This specification covers the technical requirements for SAE ITC AS series, blind, Aluminium alloy rivets that are self-plugging & have a mechanically locked, flush break stem, in both the plain & Lock Creator versions.
2016-04-05
WIP Standard
AMS4284K
This specification covers an aluminum alloy in the form of permanent mold castings.
2016-04-05
Technical Paper
2016-01-1575
Federico Ballo, Roberto Frizzi, Gianpiero Mastinu, Donato Mastroberti, Giorgio Previati, Claudio Sorlini
Abstract In this paper the lightweight design and construction of road vehicle aluminum wheels is dealt with, referring particularly to safety. Dedicated experimental tests aimed at assessing the fatigue life behavior of aluminum alloy A356 - T6 have been performed. Cylindrical specimens have been extracted from three different locations in the wheel. Fully reversed strain-controlled and load-controlled fatigue tests have been performed and the stress/strain-life curves on the three areas of the wheel have been computed and compared. The constant amplitude rotary bending fatigue test of the wheel has been simulated by means of Finite Element method. The FE model has been validated by measuring the strain at several points of the wheel during the actual test. From the FE model, the stress tensor time history on the whole wheel over a loading cycle has been extracted.
2016-04-05
Technical Paper
2016-01-1351
Simhachalam Bade
Abstract Aluminum alloys are widely used in the transportation because of their high strength-to-weight ratio and outstanding capability in absorbing energy. In this paper, performance of bumper with crash tubes using aluminum alloy AA7003 materials is compared with that of AA6061 and high strength steel (DP800) using numerical methods. Quasi-static test is simulated using the LS-DYNA implicit finite element program. Bumper and crash tubes are included in the finite element model. Symmetric Holes are provided in the crash tubes to initiate crushing. The energy absorbed by bumper and crash tubes are compared. Dynamic simulation is done using LS-Dyna explicit program. True stress-true plastic strain curves at different strain rates from the literature is used in the dynamic simulation of AA7003 material to study the strain rate effects on impact behavior of tubes. The impact mass is represented by RigidWall Planar Moving Force option in LSDYNA.
2016-04-05
Technical Paper
2016-01-1085
Ming Chen, Yanjun Wang, Wenrui Wu, Quan Cui, Kai Wang, Lingfang Wang
Abstract The present paper describes a CAE analysis approach to evaluate the thermal-mechanical fatigue (TMF) of the cylinder head of a turbo charged GDI engine with integrated exhaust manifold. It allows design engineers to identify structural weakness at the early stage or to find the root cause of cylinder head TMF failures. At SAIC Motor, in test validation phase a newly developed engine must pass a strict durability test on test bed under thermal cycling conditions so that the durability characteristics can be evaluated. The accelerated dynamometer test is so designed that it gives equivalent cumulative damage as what would occur in the field. The duty cycle includes rated speed full load, rated speed motored and idle speed conditions. A transient none-linear finite element method is used to calculate the plastic deformation and thermal mechanical behaviors of the cylinder head assembly during thermal cycling.
2016-04-05
Technical Paper
2016-01-0417
Wan Xu, Xinfeng Shi, Tian Bai, Guobiao Yang, Lianxiang Yang, Changqing Du, Dajun Zhou, Yongjun Zhou
Abstract In Aluminum Alloy, AA, sheet metal forming, the through thickness cracking at the edge of cut out is one of the major fracture modes. In order to prevent the edge cracking in production forming process, practical edge stretch limit criteria are needed for virtual forming prediction and early stamping trial evaluations. This paper proposes new methods for determining the edge stretching limit of the sheet coupons, with and without pre-stretching, based on the Digital Image Correlation (DIC) technique. A numbers of sets of notch-shaped smaller coupons with three different pre-stretching conditions (near 5%, 10% and fractured) are cut from the prestretched large specimens. Then the notch-shaped smaller coupons are stretched by uniaxial tension up to through edge cracking observed. A dual-camera 3D-DIC system is utilized to measure both coupon face strain and thickness strain in the notch area at the same time.
2016-04-05
Technical Paper
2016-01-0416
Eduardo Bustillos, Haley Linkous, Xin Xie, Laila Guessous, Lianxiang Yang
This paper presents the measurement and analysis of the edge stretching limit of aluminum alloy using digital image correlation. The edge stretching limit, also known as the “edge thinning limit,” is the maximum thinning strain at a point of edge failure resulting from tension; which may be predisposed by edge quality. Edge fracture is a vital failure mode in sheet metal forming, however it is very difficult to measure. A previous study enabled the measurement of edge thinning strain by using advanced digital image correlation but it did not consider how the edge quality could affect the edge stretching limit of aluminum alloy. This paper continues to measure edge thinning strain by comparing polished to unpolished AA5754, thus determining the effect edge quality has on the edge stretching limit. To enable the measurement by optical method for a very long and thin sample, a notch is used to localize where edge failure occurs.
2016-04-05
Journal Article
2016-01-0426
Francisco C. Cione, Armando Souza, Luiz Martinez, Jesualdo Rossi, Evandro Giuseppe Betini, Fabio Rola, Marco A. Colosio
Abstract Studying the formation and distribution of residual stress fields will improve the wheel safety operational criteria among other gains. Many engineering specifications, manufacturing procedures, inspection and quality control have begun to require that the residual stress of a particular component to be evaluated. It is known that these residual stress fields could be added to the effects of a system load (tare weight plus occupation of vehicle, traction, braking and torque combined). The mathematical tools for modeling and simulations using finite elements had evolved following the increasing computing power and hardware cost reduction. On the other hand, the experimental testing, offers specific physical component behavior and with the use of statistical tools, it is possible to predict the real behavior of the component when in operation. The experiments undertaken used the X-ray diffraction technique and the drilling method with rosette type strain gages.
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