AN INVESTIGATION OF CUTTING MECHANISMS AND STRAIN FIELDS DURING ORTHOGONAL CUTTING IN CFRPs

被引:25
作者
Agarwal, Harshit [1 ]
Amaranath, Akshay [1 ]
Jamthe, Yogesh [2 ]
Gururaja, Suhasini [1 ]
机构
[1] Indian Inst Sci, Aerosp Engn, Bangalore 560012, Karnataka, India
[2] Liquid Prop Syst Ctr LPSC ISRO, Trivandrum, Kerala, India
关键词
chip formation; cutting forces; digital image correlation (DIC); fiber-reinforced plastics (FRPs); orthogonal machining; GRAPHITE/EPOXY COMPOSITE; FIBER;
D O I
10.1080/10910344.2015.1051539
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Fiber-reinforced plastics (FRPs) are typically difficult to machine due to their highly heterogeneous and anisotropic nature and the presence of two phases (fiber and matrix) with vastly different strengths and stiffnesses. Typical machining damage mechanisms in FRPs include series of brittle fractures (especially for thermosets) due to shearing and cracking of matrix material, fiber pull-outs, burring, fuzzing, fiber-matrix debonding, etc. With the aim of understanding the influence of the pronounced heterogeneity and anisotropy observed in FRPs, "Idealized" Carbon FRP (I-CFRP) plates were prepared using epoxy resin with embedded equispaced tows of carbon fibers. Orthogonal cutting of these I-CFRPs was carried out, and the chip formation characteristics, cutting force signals and strain distributions obtained during machining were analyzed using the Digital Image Correlation (DIC) technique. In addition, the same procedure was repeated on Uni-Directional CFRPs (UD-CFRPs). Chip formation mechanisms in FRPs were found to depend on the depth of cut and fiber orientation with pure epoxy showing a pronounced "size effect." Experimental results indicate that in-situ full field strain measurements from DIC coupled with force measurements using dynamometry provide an adequate measure of anisotropy and heterogeneity during orthogonal cutting.
引用
收藏
页码:416 / 439
页数:24
相关论文
共 33 条
[1]  
ADHIKARI D, 2015, P ASM INT MECH ENG
[2]   Estimating the fatigue stress concentration factor of machined surfaces [J].
Arola, D ;
Williams, CL .
INTERNATIONAL JOURNAL OF FATIGUE, 2002, 24 (09) :923-930
[3]   An examination of the effects from surface texture on the strength of fiber reinforced plastics [J].
Arola, D ;
Ramulu, M .
JOURNAL OF COMPOSITE MATERIALS, 1999, 33 (02) :102-123
[4]   Investigations on pressure and thickness profiles in carbon fiber-reinforced polymers during vacuum assisted resin transfer molding [J].
Arulappan, C. ;
Duraisamy, A. ;
Adhikari, D. ;
Gururaja, S. .
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES, 2015, 34 (01) :3-18
[5]   Toughness and cutting: a new way of simultaneously determining ductile fracture toughness and strength [J].
Atkins, AG .
ENGINEERING FRACTURE MECHANICS, 2005, 72 (06) :849-860
[6]   ON THE MACHINING OF FIBER-REINFORCED PLASTIC (FRP) COMPOSITE LAMINATES [J].
BHATNAGAR, N ;
RAMAKRISHNAN, N ;
NAIK, NK ;
KOMANDURI, R .
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE, 1995, 35 (05) :701-716
[7]  
CALZADA KA., 2012, Journal of Manufacturing Processes, V14, P141, DOI DOI 10.1016/J.JMAPRO.2011.09.005
[8]   Failure behavior of an epoxy matrix under different kinds of static loading [J].
Fiedler, B ;
Hojo, M ;
Ochiai, S ;
Schulte, K ;
Ando, M .
COMPOSITES SCIENCE AND TECHNOLOGY, 2001, 61 (11) :1615-1624
[9]   Analytical formulation of subsurface stresses during orthogonal cutting of FRPs [J].
Gururaja, S. ;
Ramulu, M. .
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2010, 41 (09) :1164-1173
[10]   Modified Exit-ply Delamination Model for Drilling FRPs [J].
Gururaja, S. ;
Ramulu, M. .
JOURNAL OF COMPOSITE MATERIALS, 2009, 43 (05) :483-500