Fracture toughness of high-impact polystyrene based on three j-integral methods

1993 ◽  
Vol 47 (10) ◽  
pp. 1867-1880 ◽  
Author(s):  
Chang-Bing Lee ◽  
Ming-Luen Lu ◽  
Feng-Chih Chang
Keyword(s):  
Fracture Toughness ◽  
High Impact ◽  
J Integral ◽  
High Impact Polystyrene ◽  
Integral Methods

Fracture Toughness of PVC/NBR Blends Evaluated by the J-Integral

1993 ◽  
Vol 66 (4) ◽  
pp. 634-645
Author(s):  
N. Nakajima ◽  
J. L. Liu
Keyword(s):  
Fracture Toughness ◽  
Energy Dissipation ◽  
Crack Initiation ◽  
Crack Tip ◽  
J Integral ◽  
Integral Methods ◽  
Locus Method ◽  
Two Phases ◽  
Fracture Processes

Abstract The effect of gel on the fracture toughness of four PVC/NBR (50/50) blends was characterized by two different J- integral methods. Three of these blends are compatible blends with 33% acrylonitrile in NBRs, and the fourth with 21% acrylonitrile content, is an incompatible blend. Two types of gel are involved in this study microgels and macrogels. The J-integral methods are (1) conventional method proposed by Bagley and Landes and (2) crack initiation locus method proposed by Kim and Joe. The same load-displacement curves are used in both methods. However, the latter eliminates the energy dissipation away from the crack tip in the determination of Jc, while the former does not. Both methods produced almost the same results indicating that the energy dissipation away from the crack tip is negligible in these samples. The fracture toughness of a macrogel-containing blend is much greater than that of a microgel-containing blend, which, in turn, is only slightly greater than that of a gel-free blend. This implies that the two gel-containing blends have different fracture processes. The incompatible blend has the lowest fracture toughness due to weak interaction at the boundaries of the two phases.

Strengthening Epoxy/High Impact Polystyrene Interfaces Using End Grafting Polymer Chains

1996 ◽  
Vol 461 ◽  
Author(s):  
Y. Sha ◽  
C. Y. Hui ◽  
E. J. Kramer ◽  
S. F. Hahn ◽  
C. A. Berglund
Keyword(s):  
Fracture Toughness ◽  
Chain Scission ◽  
High Impact ◽  
Polymer Chains ◽  
Interface Fracture ◽  
High Impact Polystyrene ◽  
Grafting Density ◽  
Interface Fracture Toughness ◽  
Chain Lengths ◽  
Intermediate Chain

AbstractThe fracture toughness Gc of epoxy/high impact polystyrene (HIPS) interfaces was measured as a function of grafting chain density Σ of dPS-COOH chains of various degrees of polymerization N. For short chains, no effective entanglements can be formed between the dPS chains and the PS matrix of the HIPS, thus no enhancement in Gc over that of a bare interface. For very long chains, even though each chain is well entangled with the HIPS, the maximum grafting density achievable is very low and such an interface fails by scission of the grafting chains so that the interface fracture toughness is also low. Large values of Gc are observed at intermediate chain lengths where both effective entanglements can be formed and a large Σ can be achieved. Under these conditions the interface fails initially due to the formation of crazes and the subsequent break down of one of these crazes at the interface. The transition areal chain density from chain scission to crazing, Σc,is independent of N.

Elastic-plastic fracture toughness of PC/ABS blend based on CTOD and J-integral methods

Polymer ◽  
1996 ◽  
Vol 37 (19) ◽  
pp. 4289-4297 ◽  
Author(s):  
Ming-Luen Lu ◽  
Kuo-Chan Chiou ◽  
Feng-Chih Chang
Keyword(s):  
Fracture Toughness ◽  
J Integral ◽  
Elastic Plastic ◽  
Integral Methods

Fracture toughness of PC/PBT blend based on J-integral methods

1995 ◽  
Vol 56 (9) ◽  
pp. 1065-1075 ◽  
Author(s):  
Ming Luen Lu ◽  
Feng-Chih Chang
Keyword(s):  
Fracture Toughness ◽  
J Integral ◽  
Integral Methods

scholarly journals EXPERIMENTAL INVESTIGATION OF THE INFLUENCE OF MULTI-RECYCLING ON THE FRACTURE BEHAVIOR OF POST CONSUMER HIGH IMPACT POLYSTYRENE FROM DISPOSABLE CUPS EVALUATED BY THE J-INTEGRAL APPROACH.

2022 ◽  
Vol 23 (1) ◽  
pp. 268-281
Author(s):  
Hanan EL BHILAT ◽  
MABCHOUR Hassan ◽  
SALMI Houda ◽  
HACHIM Abdelilah ◽  
EL HAD Khalid
Keyword(s):  
Fracture Behavior ◽  
Tensile Tests ◽  
High Impact ◽  
Integral Approach ◽  
J Integral ◽  
High Impact Polystyrene ◽  
Test Pieces ◽  
Integral Contour ◽  
Edge Notch ◽  
Identical Test

The aim of the present paper is to study the effect of multi-recycling on the fracture behavior of high impact polystyrene from disposable cups. After collecting and washing the material, it was subjected to six cycles of recycling. After each cycle, it was subjected to tensile tests to determine the R-curves. The theory of the J-integral contour has been used for the development of a characterization method of the fracture strength appropriate to the case of this non-linear elastoplastic polymer material. To this end, the method of multiple specimens (Single edge notch tension SENT) of thin thickness was used, by introducing cracks of the same lengths to several identical test pieces. The results suggested a slight decrease in crack resistance of recycled high impact polystyrene, especially during the first cycle, demonstrated by a comparison of JIC values related to initiation of crack propagation. The fracture energy absorbed as a function of the cycles suggested a weakening within the material. ABSTRAK: Tujuan kajian ini adalah bagi mengkaji kesan tindak balas pada pelbagai peringkat-kitar semula ke atas kerapuhan polisterin berimpak tinggi pada cawan pakai buang. Selepas mengumpul dan membasuh cawan ini, terdapat enam peringkat kitar semula. Pada setiap peringkat, ianya akan melalui ujian tegangan bagi mendapatkan lengkung-R. Teori kamiran-J kontur telah digunakan bagi mencipta kaedah khas bagi mengkaji kekuatan retakan bersesuaian bagi kes bahan polimer elastoplastik yang tidak-linear. Sehingga kini, kaedah Regangan Tepi Takuk Tunggal (SENT) telah digunakan pada spesimen berketebalan rendah, dengan menghasilkan keretakan sama panjang di permulaan kajian di buat pada pelbagai bahan uji yang serupa. Dapatan kajian menunjukkan rintangan pada retakan telah berkurang sedikit pada polisterin kitar semula berimpak tinggi, terutama pada kitaran pertama, yang ditunjukkan pada nilai JIC pada permukaan rambatan retakan awal. Tenaga kerapuhan yang meresap pada setiap kitaran menunjukkan bahan telah melemah dari dalam.

SIMOCH

Alloy Digest ◽  
1966 ◽  
Vol 15 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Impact Strength ◽  
Cold Work ◽  
Heat Treating ◽  
High Impact ◽  
High Shock ◽  
Alloy Tool ◽  
High Impact Strength ◽  
Shock Resistance

Abstract SIMOCH is a low alloy tool steel having high shock resistance, high impact strength and excellent wear resistance. It is recommended for many hot work and cold work applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-186. Producer or source: Teledyne Vasco.

RMI 6Al-2Cb-1Ta-0.8Mo

Alloy Digest ◽  
1967 ◽  
Vol 16 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Impact Strength ◽  
Base Alloy ◽  
Heat Treating ◽  
High Impact ◽  
Good Corrosion Resistance ◽  
Deep Diving ◽  
High Impact Strength ◽  
Reactive Metals

Abstract RMI-6A1-2Cb-1Ta-0.8Mo is a titanium-base alloy recommended for parts requiring high impact strength along with good corrosion resistance, especially for deep diving under sea vehicles. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: Ti-53. Producer or source: Reactive Metals Inc..

ATLAS 93

Alloy Digest ◽  
1954 ◽  
Vol 3 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Properties ◽  
Heat Treating ◽  
High Impact

Abstract ATLAS 93 is a chromium molybdenum shock resisting steel, having rather deep oil hardening characteristics with fairly high impact value. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-22. Producer or source: Allegheny Ludlum Corporation.

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