Analysis of tensile preloaded composites subjected to low-velocity impact loads

Ajit D Kelkar; Jagannathan Sankar; K. Rajeev

Analysis of tensile preloaded composites subjected to low-velocity impact loads

North Carolina Agricultural and Technical State University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

22 Scopus citations

Abstract

Composite materials are widely used in aircraft structures due to their high specific strength, stiffness, and the resultant weight savings. However, graphite fiber-reinforced composite laminates have been found to have low ultimate strains, no plastic deformation range, and no usable strength in the thickness direction. These limitations become obvious when laminates are subjected to impact loads. Some of the factors which affect the impact damage mechanics include the effect of material properties, projectile characteristics, lay-up and stitching, and environmental conditions. It is therefore important to determine the effect of preloads on the damage mechanics in thin and thick composite laminates when subjected to low velocity impact loading.

Original language	English
Title of host publication	Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Publisher	AIAAReston, VA, United States
Pages	1978-1987
Number of pages	10
Volume	3
Edition	1944
State	Published - Jan 1 1998
Event	Proceedings of the 1998 39th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and Exhibit and AIAA/ASME/AHS Adaptive Structures Forum. Part 1 (of 4) - Long Beach, CA, USA Duration: Apr 20 1998 → Apr 23 1998

Conference

Conference	Proceedings of the 1998 39th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and Exhibit and AIAA/ASME/AHS Adaptive Structures Forum. Part 1 (of 4)
City	Long Beach, CA, USA
Period	04/20/98 → 04/23/98

Cite this

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title = "Analysis of tensile preloaded composites subjected to low-velocity impact loads",

abstract = "Composite materials are widely used in aircraft structures due to their high specific strength, stiffness, and the resultant weight savings. However, graphite fiber-reinforced composite laminates have been found to have low ultimate strains, no plastic deformation range, and no usable strength in the thickness direction. These limitations become obvious when laminates are subjected to impact loads. Some of the factors which affect the impact damage mechanics include the effect of material properties, projectile characteristics, lay-up and stitching, and environmental conditions. It is therefore important to determine the effect of preloads on the damage mechanics in thin and thick composite laminates when subjected to low velocity impact loading.",

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edition = "1944",

note = "Proceedings of the 1998 39th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and Exhibit and AIAA/ASME/AHS Adaptive Structures Forum. Part 1 (of 4) ; Conference date: 20-04-1998 Through 23-04-1998",

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Kelkar, AD , Sankar, J & Rajeev, K 1998, Analysis of tensile preloaded composites subjected to low-velocity impact loads. in Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. 1944 edn, vol. 3, AIAAReston, VA, United States, pp. 1978-1987, Proceedings of the 1998 39th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and Exhibit and AIAA/ASME/AHS Adaptive Structures Forum. Part 1 (of 4), Long Beach, CA, USA, 04/20/98.

Analysis of tensile preloaded composites subjected to low-velocity impact loads. / Kelkar, Ajit D ; Sankar, Jagannathan; Rajeev, K.
Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. Vol. 3 1944. ed. AIAAReston, VA, United States, 1998. p. 1978-1987.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Analysis of tensile preloaded composites subjected to low-velocity impact loads

AU - Kelkar, Ajit D

AU - Sankar, Jagannathan

AU - Rajeev, K.

PY - 1998/1/1

Y1 - 1998/1/1

N2 - Composite materials are widely used in aircraft structures due to their high specific strength, stiffness, and the resultant weight savings. However, graphite fiber-reinforced composite laminates have been found to have low ultimate strains, no plastic deformation range, and no usable strength in the thickness direction. These limitations become obvious when laminates are subjected to impact loads. Some of the factors which affect the impact damage mechanics include the effect of material properties, projectile characteristics, lay-up and stitching, and environmental conditions. It is therefore important to determine the effect of preloads on the damage mechanics in thin and thick composite laminates when subjected to low velocity impact loading.

AB - Composite materials are widely used in aircraft structures due to their high specific strength, stiffness, and the resultant weight savings. However, graphite fiber-reinforced composite laminates have been found to have low ultimate strains, no plastic deformation range, and no usable strength in the thickness direction. These limitations become obvious when laminates are subjected to impact loads. Some of the factors which affect the impact damage mechanics include the effect of material properties, projectile characteristics, lay-up and stitching, and environmental conditions. It is therefore important to determine the effect of preloads on the damage mechanics in thin and thick composite laminates when subjected to low velocity impact loading.

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M3 - Conference contribution

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SP - 1978

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BT - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

PB - AIAAReston, VA, United States

T2 - Proceedings of the 1998 39th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and Exhibit and AIAA/ASME/AHS Adaptive Structures Forum. Part 1 (of 4)

Y2 - 20 April 1998 through 23 April 1998

ER -

Analysis of tensile preloaded composites subjected to low-velocity impact loads

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Conference

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