3 edition of Bearing-bypass loading on bolted composite joints found in the catalog.
Bearing-bypass loading on bolted composite joints
John H. Crews
by National Aeronautics and Space Administration, Langley Research Center, For sale by the National Technical Information Service in Hampton, Va, [Springfield, Va
Written in English
|Other titles||Bearing bypass loading on bolted composite joints.|
|Statement||J.H. Crews, Jr. and R.A. Naik.|
|Series||NASA technical memorandum -- 89153.|
|Contributions||Naik, R. V. A., Langley Research Center.|
|The Physical Object|
In the pursuit of a lighter composite wing design, fast and effective methodologies for sizing and validating the wing members (e.g., spar, ribs, skins, etc.) are required. In the present paper, the preliminary design methodology of an airliner main composite wing, which has an innovative multispar configuration instead of the conventional two-spar design, is investigated. Load transfer in bolted joints 1. Shear Joint: the applied loading is at right angles to the fastener axis F T 2 D N µ! Both of these require two factors: preload, or clamping force, and friction. F N ×μ> S 2. Rotating or Torque Joint F N S SFile Size: 1MB.
The two-fastener test configurations described in this test method are similar to those in Test Method D/DM as well as those used by industry to investigate the bearing portion of the bearing/bypass interaction response for bolted joints, where the specimen may produce either a bearing failure mode or a bypass failure mode. JH Crews Jr and RA Naik, “Bearing Bypass loading composite bolted joints”, NASA-TM, LJ Hart-Smith, “Designing with Advanced Fibrous Composites”, J Aero Soc of India, V 40, No 3, pp –, D Rose, M Rother and P Schelling, “Typical joints in a wing structure”, Chap 8, AGARD CP , Mar
The two-fastener test configurations described in this test method are similar to those in Test Method D/ DM as well as those used by industry to investigate the bearing portion of the bearing/bypass interaction response for bolted joints, where the specimen may produce either a bearing failure mode or a bypass failure mode. Does anyone know of a good method or program to allow me to calculate the MS (or RF) for a bolted joint in a composite structure? I have a multi bolt joint between two sheets that I need to check for all possible failure modes (eg bearing, bearing/bypass, shear-out etc .
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BEARINGBYPASS LOADING ON BOLTED COMPOSITE JOINTS [NASA-TM) BEARING-BYPASS LOADXNG ON ~~n-2~~37 Avail: NTIS HC €i03/flP AO. CSCL llD BOLTED COBPQSITE JOINTS (NASA) 34 p unclas S3/24 J.
CREWS, JR. and R. NAlK MAY National Aeronautics and Space Administration langley Research Canter Hampton, Virginia A combined experimental and analytical study has been conducted to investigate the effects of simultaneous bearing and bypass loading on graphite/epoxy (T/) laminate.
Tests were conducted with a test machine that allows the bearing-bypass load ratio to be controlled while a single-fastener coupon is loaded to failure in either tension or compression.
Full text of "Bearing-bypass loading on bolted composite joints" See other formats NASA TECHNICAL MEMORANDUM BEARING-BYPASS LOADING ON BOLTED COMPOSITE JOINTS (NASA-TM) BEAEING-BYPASS LOADING ON N BOLTED COMPOSITE JOINTS (NASA) 34 p Avail: NTIS HC &03/MF AOt CSCL 11D Dnclas 33/24 J.
CREWS, Bearing-bypass loading on bolted composite joints book. and R. NAIK. Bearing-bypass loading on bolted composite joints by John H. Crews,National Aeronautics and Space Administration, Langley Research Center, For sale by the National Technical Information Service edition, Microform in English.
Bearing-bypass loading on bolted composite joints by Crews, J. H., Jr.; Naik, R. Publication date An offset-compression failure mode was identified for laminate failure under compression bearing-bypass loading.
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Abstract. An investigation was performed to study the effect of bypass loads on the loading-carrying capability of bolted composite joints.
The previously developed computer code BJSTAT was utilized to generate the strength envelope of bolted composite joints subjected to bypass : C.-L. Hung, H.-T. Sun, F.-K. Chang. It is, however, possible to perform very simple tests using multiple fasteners (typically two) to achieve bearing with bypass, albeit with limited control of the ratio.
This is the approach taken by ASTM in a relatively new standard, ASTM D, 2 first published in This standard presently contains three test procedures: A, B and C.
The methodology has been captured in an automation tool, BIBOLT, which can be used to rapidly define, execute, and post-process large numbers of bearing-bypass analyses of composite bolted joints. nasa technical memorandum stress analysis method for clearance-fit joints with bearing-bypass loads rm a.
naik and j. crews, jr. (basi-!ztl) siress analisis 1eteiod fob ~a~ cleabaoce-pip jcfb'is ll'xh eeihilg-bypass lcads (nasa) 32 f cscl 11d unclas File Size: KB. This test method determines the uniaxial bearing/bypass interaction response of multi-directional polymer matrix composite laminates reinforced by high-modulus fibers by either double-shear tensile loading (Procedures A and C) or single-shear tensile or compressive loading (Procedure B) of a two-fastener specimen.
The scope of this test method is limited to net section (bypass) failure modes. A three-dimensional finite element model of a three-bolt, single-lap composite joint is constructed using the non-linear finite element code The model is validated against an experiment where the load distribution in the joint is measured using instrumented bolts.
Two different joint configurations are examined, one with neat-fit clearances at each bolt-hole and another with a Cited by: Automated Analysis and Failure Load Prediction of Bolted Composite Joints James Ainsworth 1, Craig Collier*, Phil Yarrington.
and Ryan Lucking. Collier Research Corp. Hampton, VA. Automated analysis of bolted composite joints is essential to the design and analysis of modern aerospace vehicles. Bolted Joints Multi-Row Joints Shear and Tension Clips Bolt Groups For educational purposes only. Although all care is taken to ensure the validity.
Data are presented on time-dependent behavior of bolted joints made from ply IM7 carbon fiber/K3B thermoplastic polyimide quasi-isotropic lay-up tested in pure bolt bearing and in bearing bypass.
Composite panels were aged at temperatures of and °C for 5 and 10 (h) to simulate cumulative effects of supersonic flight Cited by: 6. Net-tension strength of double-lap joints under bearing-bypass loading conditions using the cohesive zone model Article in Composite Structures January with Reads.
Advanced modules are free for companies and other for-profit users, we offer a day evaluation period. All Advanced modules use MS Excel and are augmented by the capability of VBA (Visual Basic for Applications).
Hart-Smith, L. J., “Analysis Methods for Bolted Composite Joints Subjected to In-Plane Shear Loads”, McDonnell Douglas Paper MDC 96K, presented to AGARD 83rd Structures and Materials Panel, Bolted/Bonded Joints in Polymeric Composites, Specialists Meeting, Florence, Italy, September 2–3, ; published in AGARD Conference Proceedings Cited by: The main failure modes for bolted joints in composite structures are illustrated in Fig.
Apart from the failure of the bolt caused by a combination of shear and bending stresses in the fastener, the joint can fail in either one of the three potential modes, namely net-tension, shear-out and : F.-X. Irisarri, F. Laurin, N. Carrere. The design of composite joints requires a sound understanding of the different failure modes.
At a coupon level, there are generally six ways in which a composite bolted joint can fail, referred to as bearing, net-tension, shear-out, cleavage, fastener pull-through and bolt failure, as illustrated in Figure (a)–(f), respectively.
Failure can also occur in more than one mode, either Author: C.T. McCarthy, M.A. McCarthy. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Abstract. A three-dimensional finite element model of a three-bolt, single-lap composite joint is constructed using the non-linear finite element code The model is validated against an experiment where the load distribution in the joint is measured using instrumented bolts.1 0 2 Source of Information Concerning the Test Joints The loading history of the test joints to be io= vestigated was taken from the "Fritz Laboratory Report Noo " titled "Static Tension Tests of Long Bolted Joints" by Robert A.
Bendigo and John Lo Rumpf 0 This report is dated February •.Composite joints and connections: Principles, modelling and testing Pedro P. Camanho The growing use of composites for structural applications in sectors such as aerospace demands that engineers have a thorough understanding of how composite joints behave under various loads.