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Keywords: impact
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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2015
ISBN: 978-0-8031-7625-6
... Increased property damage from hail impact has become more common in recent years, with a majority of the damage occurring to roofs. To help address this concern, a very severe hail (VSH) rating for low slope roofing is being developed. This work is being done using a modified version...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2009
ISBN: 978-0-8031-7503-7
... After manufacture and before retail, ice hockey helmets must pass safety standard tests based primarily on multiple impacts at several global sites to receive certification. Unknown is the effective “shelf life” of these products; that is, do material and construction properties deteriorate...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2009
ISBN: 978-0-8031-7503-7
... In this study, the relationship between flagrant impacts to the head and peak translational and rotational accelerations in reconstructed ice hockey impacts was examined. A Hybrid III head-neck complex attached to a sliding table and equipped with nine accelerometers was fitted with an ice...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2009
ISBN: 978-0-8031-7508-2
... Impact tests in liquid oxygen and oxygen enriched liquids have been conducted on aluminum foils (0.2 mm thick) used for heat exchangers of air separation units (ASUs). Some adaptations to the ASTM Standard D2512, “Standard Test Method for Compatibility of Materials with Liquid Oxygen,” have been...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2009
ISBN: 978-0-8031-7508-2
... regarding material selection for vacuum superinsulation materials in LOX applications are also provided. insulation material superinsulation organic nonorganic glass fiber intermediate layers contamination aluminum foil polyester interspace compatibility vacuum adsorbent getter impact...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2005
ISBN-10: 0-8031-3489-4
ISBN: 978-0-8031-3489-8
... An experimental evaluation of the dynamic fracture properties of an automotive epoxy is presented. Pronounced stick-slip behavior was observed in both quasi-static and impact tests of aluminum and composite adherends bonded with this adhesive. An experimental technique for conducting low speed...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2003
ISBN-10: 0-8031-3465-7
ISBN: 978-0-8031-3465-2
... A research program is underway to experimentally characterize the strain rate dependent deformation and failure response of polymer matrix composites subject to high strain rate impact loads and to develop strain rate dependent deformation and failure models for the analysis of these types...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2002
ISBN-10: 0-8031-2893-2
ISBN: 978-0-8031-2893-4
... The need for a static test method for modeling low-velocity foreign object impact events to composites would prove to be very beneficial to researchers because much more data can be obtained from a static test than from an impact test. In order to examine if this is feasible, a series of static...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2001
ISBN-10: 0-8031-2862-2
ISBN: 978-0-8031-2862-0
... Damage tolerance requirements for integrally stiffened composite wing skins are typically met using design allowables generated by testing impact-damaged subcomponents, such as three-stringer stiffened panels. To improve these structures, it is necessary to evaluate the critical design...
eBook Chapter
Book: Bench Testing of Industrial Fluid Lubrication and Wear Properties Used in Machinery Applications
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2001
ISBN-10: 0-8031-2867-3
ISBN: 978-0-8031-2867-5
... as they often are in elastohydrodynamic conjunctions. The experimental method presented in this paper is based on analysis of propagating waves in a beam, due to an impact on its end surface, using FFT analysis. Since the impact is oblique, both non-dispersive compression waves and dispersive flexural waves...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2871-1
ISBN: 978-0-8031-2871-2
... Impact tests in LOX according to ASTM D 2512 were conducted on thin aluminum films (7 to 20 μm) together with glass fibers films used for the super insulation of vacuum insulated cryogenic vessels. Influence of the film thickness, type of material and number of layers were investigated...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2488-0
ISBN: 978-0-8031-2488-2
... United States ice hockey helmet standards were developed with an elastomeric surface for impact attenuation tests. These tests measure peak acceleration as a function of impact velocity. Recently, other standards have specified a flat steel impact surface, with a lower impact velocity (3.96 m/s...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2864-9
ISBN: 978-0-8031-2864-4
... Based on a previous round-robin exercise of the German DVM task group on “Instrumented Impact Testing” with about 400 instrumented Charpy-specimens being tested, another exercise was performed to explore the possibilities of extended evaluations such as single-specimen methods. The previously...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2852-5
ISBN: 978-0-8031-2852-1
... effects of such processes on the materials properties and design data. iter demo stainless steel ferritic steel martensitic steel copper alloy 316LN IG F82H CuCrZr Cu-Al25 tensile impact fracture small specimen hip multilayer code design Farhad Tavassoli, 1Helen Burlet, 2 Andres...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2614-X
ISBN: 978-0-8031-2614-5
... experimental values. Similar success was achieved for predicting the upper shelf energy of subsize precracked specimens based on full size data. finite element modeling dynamic impact weld upper shelf energy Charpy specimens precracked neutron irradiation Arvind S. Kumar 1, Scott E. Sidener2...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2614-X
ISBN: 978-0-8031-2614-5
..., at least up to 275°C. It is shown that this embrittlement is not due to pickup of O or other interstitial solutes during the irradiation. vanadium strength toughness impact ductile-to-brittle transition embrittlement D. J. Alexander, 1L. L. Snead, 1S. J. Zinlde, 1A. N. Gubbi) A. F. Rowcliffe...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1998
ISBN-10: 0-8031-2476-7
ISBN: 978-0-8031-2476-9
... Dynamic finite element modeling of the fracture behavior of pressure vessel materials under impact loading was conducted to study the effects of ligament size and tensile properties on the crack extension (USE e ) and propagation (USE pr ) energies. The sum of USE e and USE pr is the total...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1998
ISBN-10: 0-8031-2609-3
ISBN: 978-0-8031-2609-1
... Because composite laminates are very susceptible to impact loading even at low velocity, low-velocity impact is an important subject in laminated composite analysis. The impact-induced damage is usually invisible to the naked eye and can cause serious structural degradation. Many low-velocity...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1998
ISBN-10: 0-8031-2609-3
ISBN: 978-0-8031-2609-1
... The proliferation of composites as a structural material has increased the necessity for detection and characterization of impact damage. Impact damage, due either to mishandling or in-service environment, in the form of delaminations, matrix cracking, and fiber chopping, may be sufficient...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1997
ISBN-10: 0-8031-2473-2
ISBN: 978-0-8031-2473-8
... The erosion process is studied from a solid mechanics perspective. This paper describes the analysis of multiple coincident particle impacts of an elastic steel sphere on an elastic-plastic copper target material. The analysis is performed using the DYNA2D nonlinear dynamic finite element code...
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