TY - GEN
T1 - Effect of incremental depth and part shape on failure modes in single point incremental forming of polymers
AU - Davarpanah, Mohammad Ali
AU - Malhotra, Rajiv
N1 - Publisher Copyright:
Copyright © 2015 by ASME.
PY - 2015
Y1 - 2015
N2 - Single Point Incremental Forming (SPIF) has received considerable attention recently due to advantages such as partshape-independent tooling, higher formability and higher process flexibility as compared to conventional forming. While significant research has been performed on SPIF of metals, recent work has also shown the feasibility of using SPIF for cold-forming of thermoplastic polymer sheets. However, the effects of incremental depth and part shape on the modes of failure during polymer SPIF have rarely been investigated. This paper examines the effects of part shape and incremental depth on the formability and failure modes in polymer SPIF. It is shown that greater incremental depths result in greater formability in polymer SPIF. Furthermore, it is shown that increasing the rate of change of the wall angle with the Z depth of the part increases the maximum formability achievable using a given incremental depth. At the same time, it is observed that this dual advantage of greater formability and reduced forming time, possible with higher incremental depths, is limited by the occurrence of sheet wrinkling when the incremental depth becomes too high. Additionally, the dependence of sheet wrinkling on the overall shape of the part being formed is also shown.
AB - Single Point Incremental Forming (SPIF) has received considerable attention recently due to advantages such as partshape-independent tooling, higher formability and higher process flexibility as compared to conventional forming. While significant research has been performed on SPIF of metals, recent work has also shown the feasibility of using SPIF for cold-forming of thermoplastic polymer sheets. However, the effects of incremental depth and part shape on the modes of failure during polymer SPIF have rarely been investigated. This paper examines the effects of part shape and incremental depth on the formability and failure modes in polymer SPIF. It is shown that greater incremental depths result in greater formability in polymer SPIF. Furthermore, it is shown that increasing the rate of change of the wall angle with the Z depth of the part increases the maximum formability achievable using a given incremental depth. At the same time, it is observed that this dual advantage of greater formability and reduced forming time, possible with higher incremental depths, is limited by the occurrence of sheet wrinkling when the incremental depth becomes too high. Additionally, the dependence of sheet wrinkling on the overall shape of the part being formed is also shown.
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U2 - 10.1115/MSEC20159263
DO - 10.1115/MSEC20159263
M3 - Conference contribution
AN - SCOPUS:84945347919
T3 - ASME 2015 International Manufacturing Science and Engineering Conference, MSEC 2015
BT - Processing
PB - American Society of Mechanical Engineers
T2 - ASME 2015 International Manufacturing Science and Engineering Conference, MSEC 2015
Y2 - 8 June 2015 through 12 June 2015
ER -