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Tuesday, July 28, 2020 | History

2 edition of Failure mechanics in low-velocity impacts on thin composite plates found in the catalog.

Failure mechanics in low-velocity impacts on thin composite plates

Wolf Elber

Failure mechanics in low-velocity impacts on thin composite plates

by Wolf Elber

  • 55 Want to read
  • 31 Currently reading

Published by National Aeronautics and Space Administration, Scientific and Technical Information Branch, For sale by the National Technical Information Service] in Washington, D.C, [Springfield, Va .
Written in English

    Subjects:
  • Deformations (Mechanics),
  • Impact.,
  • Composite materials.

  • Edition Notes

    StatementWolf Elber.
    SeriesNASA technical paper -- 2152.
    ContributionsUnited States. National Aeronautics and Space Administration. Scientific and Technical Information Branch.
    The Physical Object
    Pagination23 p. :
    Number of Pages23
    ID Numbers
    Open LibraryOL18036383M

      Analysis and optimization of smart hybrid composite plates subjected to low-velocity impact using the response surface methodology (RSM) Thin-Walled Structures, Vol. 46, No. 11 Damage prediction in composite plates subjected to low velocity impactCited by: Such impacts can range from the most ordinary at low velocity - a tool dropped on a product - to the hypervelocity impact of space debris on a spacecraft. This book explains how damage develops during impact, the effect of impact-induced damage on the mechanical behavior of structures, and methods of damage prediction and by:

      Fig. 1: Dimensions of impact test specimens (in mm) and micrograph of composite laminate Low Velocity Impact Testing The low velocity impact testing was conducted on a drop tower facility at Dresden University of Technology. The CFRP plate to be impacted was positioned under this drop tower in a specialCited by: In the present study, low velocity Impact experiments are performed on E-glass/epoxy composite and numerically simulated using a continuum damage mechanics based material model. The damage observed as back face signature on the laminate, contact forces and displacement plots with respect to time are studied and compared with FE results to Author: Harpreet Singh, Puneet Mahajan, K. K. Namala.

      Progressive damage models based on continuum damage mechanics are used in combination with cohesive elements to explore the effect of three different failure criteria including Chang-Chang, Hashin and Puck criteria, on the structural response and the failure mechanisms of composite laminates subjected to low-velocity by: 3.   The paper presents recent progress on modelling low velocity impact induced damage in fibre reinforced composite laminates. It is important to understand the mechanisms of barely visible impact damage (BVID) and how it affects structural performance. To reduce labour intensive testing, the development of finite element (FE) techniques for simulating impact damage becomes essential and Cited by: 8.


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Failure mechanics in low-velocity impacts on thin composite plates by Wolf Elber Download PDF EPUB FB2

Lence between low-velocity impact and static testing. Both the deformation and failure mechanics under impact were representable by static indentation tests. Under low-velocity impacts, such as tool drops, the dominant deformation mode of the plates was the first, or static, mode.

Failure Mechanics in Low-Velocity Impacts on Thin Composite Plates [Wolf Elber] on *FREE* shipping on qualifying offers. Both the deformation and failure mechanics under impact were representable by static indentation tests. Under low-velocity impacts such as tool drops, the dominant deformation mode of the plates was the first, or static, mode.

Higher modes are excited on contact, but they decay significantly by the time the first-mode load reaches a : W. Elber. Therefore, the failure mechanisms for a composite plate under impact loading reduce the global stiffness of the structure more than the concentrated failure mechanisms.

This observation explains why the slope of indentation curve is very different of the slope presented by the impact curve, in Cited by: Failure mechanics in low-velocity impacts on thin composite plates / By Wolf. Elber and United States. Topics: Composite materials, Impact, Deformations (Mechanics) Publisher: Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.: For sale by the National Technical.

Failure analysis of low velocity impact on thin composite laminates: Experimental and numerical approaches Article in Composite Structures 83(4) June with Reads.

The low velocity impact damage in laminated composite plate structures can be recognized as a debilitating threat; it have a significant effect on the strength and durability of the laminates; it is an inevitable event, so it must be countered by appropriate design by: Matrix cracking and delamination are the most common damage mechanisms in laminated fiber reinforced composites due to low velocity impact.

An approach to predict the initiation and propagation of damage in composite laminated plates is brought forward in this paper, which is based on contact constraint introduced by penalty function by: Fiber-reinforced composite plates subjected to low velocity impact were studied by use of finite element analysis where Mindlin’s plate theory and 9-node Lagrangian element were considered.

Clegg et al. () worked out interesting study of hypervelocity impact damage prediction in by: 7. Dynamic Response and Failure of Composite Materials and Structures presents an overview of recent developments in a specialized area of research with original contributions from the authors who have been asked to outline needs for further investigations in their chosen topic area.

The result is a presentation of the current state-of-the art in. This paper is a review of low-velocity impact analysis of composite structure.

Low impact velocity and damage mode due to impact load and failure criteria’s are explained. The effects of the composites constituents on impact properties, test method to measure the strength of the composite structure are studied with impact properties are Author: Shreekant Patil, D.

Mallikarjuna Reddy, Munirami Reddy. Numerical simulations and experimental experiences of impact on composite structures. Part 2 Low Velocity Impact on Composite Structures 6.

On the modelling of low velocity impact Phenomena on Composite structures 7. Semi-continuous modeling of low velocity impacts on woven fabric laminates 8. Impact of composite plates in contact with water 9. In low-velocity impact, the structure has more time to respond to the impactor and consequently more energy can be absorbed elastically.

During their service life, composite laminates are likely to experience low-velocity impacts. The composite structures can mostly absorb impact energy by elastic deformation and through damage by: 2. A progressive failure model for composite laminates subjected to low velocity impact damage.

Computers & Structures, Vol. 86, Issue. p. Impact on Composite Structures,Camb Univ Press. Failure mechanics in low-velocity impacts on thin composite plates, Cited by: Scaling of Low-Velocity Impact for Symmetric Composite Laminates Article (PDF Available) in Journal of Reinforced Plastics and Composites 11(3) April with 30 Reads How we measure 'reads'.

Failure mechanics in low-velocity impacts on thin composite plates. Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; [Springfield, Va.: For sale by the National Technical Information Service], The delamination process in thin composite plates subjected to low-velocity impact is simulated using a specially developed 2D cohesive/volumetric finite element : Daihua Zheng.

The prediction of dynamic behavior for composite laminates is very complex, because of many concurrent phenomena can take place during impact load. Fiber breakage, delaminations, matrix cracking, plastic deformations due to contact and large displacements are some effects.

Thus, in this work, some mechanisms are simulated by using a new failure model, which considers five failure. Shivakumar, KN, Elber, W, Illg, W “Prediction of Impact Force and Duration Due to Low-Velocity Impact on Circular Composite Laminates” Journal of Applied Mechanics, Transactions of the ASME, vol.

52, no. 3, pp. – CrossRef Google ScholarCited by: 6. The low velocity impact (LVI) analysis of fiber-reinforced plastic (FRP) plates is a significant study to evaluate the reliability of lightweight structures.

This study has wide applications in offshore and naval industries. Safety and reliability assessment as per the international standards is one of the basic objectives of the study. LVI on FRP plates are studied taking the material Author: Shivdayal Patel. Estimation of low-velocity impact damage in laminated composite circular plates using nonlinear finite element analysis Computers & Structures, Vol.

54, No. 6 Damage and its growth in laminated composite circular/rectangular plates undergoing large deformationsCited by:   Thin glass/epoxy plates fabricated from 3M prepreg tape were subjected to low-velocity impact.

Delamination in the impacted composite plates was measured by edge replication and was identified as the major damage mode. The effects of fiber orientation, thickness, and lamination on the delamination resistance were investigated.

Experimental results verified three previous findings: (1) a Cited by:   A continuum damage mechanics (CDM) meso-model was derived for both intraply and interply progressive failure behaviors of a 2D woven-fabric composite laminate under a transversely low velocity impact.

An in-plane anisotropic damage constitutive model of a 2D woven composite ply was derived based on CDM within a thermodynamic framework, an elastic constitutive model with damage Cited by: 4.