Emma Ching

Follower

Following

Co-author

Public Views

Mohd Sofian Azirun

University of Malaya, Malaysia

Dr. Sujata Das

Bijupatnaik University Of Technology

Karin Becker

Universidade Federal do Rio Grande do Sul

Dr. José Delgado Rodrigues

National Laboratory for Civil Engineering

A. Młyniec

Edward Bormashenko

Ariel University

James Bashkin

University of Missouri - St. Louis

Cristina Mogosan

University of Medicine and Pharmacy "Iuliu Hatieganu" Cluj-Napoca

Andrew Kettler

University of South Carolina Union

Stefano Piastra

Università di Bologna

Interests

Uploads

Papers by Emma Ching

$Research paper thumbnail of Temperature dependence of the fracture behaviour of polypropylene films$

Temperature dependence of the fracture behaviour of polypropylene films

$Research paper thumbnail of Measurement of plane stress essential work of fracture (EWF) for polymer films: effects of gripping and notching methodology$

Measurement of plane stress essential work of fracture (EWF) for polymer films: effects of gripping and notching methodology

by Emma Ching and Robert Li

Polymer Testing, 2001

The double-edge-notched-tension (DENT) geometry is widely used in the essential work of fracture ... more The double-edge-notched-tension (DENT) geometry is widely used in the essential work of fracture (EWF) method to measure the plane-stress fracture toughness (w e) values for ductile polymer film. In the measurement, the ligament l has to satisfy the requirement that 3Ϫ5tՅlՅmin(W/3,2r p). Due to this "valid ligament range" requirement, different gripping methods may have to be employed for films of different thickness. In this study, the so-called "direct gripping" and "drilled hole gripping" methods were investigated. It was concluded that the w e values were independent of the sample width and the gripping methods. Two different notching techniques were used to pre-notch the specimens, and it was concluded that the same w e values were obtained irrespective of the notching method used. Finally, the experimentally measured w e for polyethylene terephthalate glycol (PETG) films of different thickness are in good agreement with the theoretical predicted values.

Download

$Research paper thumbnail of Effects of gauge length and strain rate on fracture toughness of polyethylene terephthalate glycol (PETG) film using the essential work of fracture analysis$

Effects of gauge length and strain rate on fracture toughness of polyethylene terephthalate glycol (PETG) film using the essential work of fracture analysis

Polymer Engineering & Science, 2000

Page 1. Effects of Gauge Length and Strain Rate on Fracture Toughness of Polyethylene Terephthala... more

$Research paper thumbnail of Essential work of fracture (EWF) analysis for short glass fiber reinforced and rubber toughened nylon-6$

Essential work of fracture (EWF) analysis for short glass fiber reinforced and rubber toughened nylon-6

Polymer Engineering & Science, 2003

... Glass Fiber Reinforced and Rubber Toughened Nylon-6 EMMA C. Y. CHING&amp;#x27;. &amp;... more ... Glass Fiber Reinforced and Rubber Toughened Nylon-6 EMMA C. Y. CHING&amp;#x27;. &amp;#x27;, ROBEFR K. Y. LI&amp;#x27;*, SIE CHIN TJONG&amp;#x27;, and MU-WING MAI &amp;#x27;* &amp;#x27;Department of Physics and Materials Science City University of Hong Kong Tat Chee Avenue Kowloon, Hong Kong ...

$Research paper thumbnail of Effect of strain rate on the fracture toughness of some ductile polymers using the essential work of fracture (EWF) approach$

Effect of strain rate on the fracture toughness of some ductile polymers using the essential work of fracture (EWF) approach

Polymer Engineering & Science, 2000

The plane strain fracture toughness of two ductile polymers, ultra high molecular weight polyethy... more The plane strain fracture toughness of two ductile polymers, ultra high molecular weight polyethylene (UHMWPE) and acrylonitrile-butadiene-styrene (ABS), was measured by using the essential work of fracture approach. Truly plane strain fracture toughness (Wre) was measured for ABS at quasi-static and impact rates of loading. For UHMWPE, the measured values were only "near" plane strain values (Wre*). It was confirmed both w,~* and wIe were independent of specimen type but dependent on strain rate. For UHMWPE, there was a negative strain rate effect, i.e., wIe* decreased with increasing loading rate. At low quasi-static loading rate (v 5 10 mm/min), wr,* was constant at 55 kJ/m2. It then decreased to 15 W/m2 when the loading rate was increased to 100 mm/min, and remained at that value even up to impact rate of loading (u = 3.7 m/s). For ABS, a mild positive strain rate effect was observed. w,, increased from 13 kJ/m2 at u = 10 mm/min to 17 kJ/m2 at u = 3.7 m/s.

Download

Correction of the measurement of fiber length of short fiber reinforced thermoplastics

Composites Part A: Applied Science and Manufacturing, 2002

... People&amp;amp;amp;#x27;s Republic of China. b Department of Manufacturing Engineering an... more

Fracture behaviour of polypropylene films at different temperatures: assessment of the EWF parameters

Polymer, 2001

The fracture of films of one polypropylene (PP) homopolymer and three ethylene–propylene (EPBC) b... more The fracture of films of one polypropylene (PP) homopolymer and three ethylene–propylene (EPBC) block copolymers with different ethylene content (EC) at temperatures around their glass transition (Tg) is investigated by means of the essential work of fracture (EWF) Method. The fracture behaviour is studied at low speed (2mm/min) for the different materials, in the range from −40 to +70°C. The

$Research paper thumbnail of Temperature dependence of the fracture behaviour of polypropylene films$

Temperature dependence of the fracture behaviour of polypropylene films

$Research paper thumbnail of Measurement of plane stress essential work of fracture (EWF) for polymer films: effects of gripping and notching methodology$

Measurement of plane stress essential work of fracture (EWF) for polymer films: effects of gripping and notching methodology

by Emma Ching and Robert Li

Polymer Testing, 2001

Download

$Research paper thumbnail of Effects of gauge length and strain rate on fracture toughness of polyethylene terephthalate glycol (PETG) film using the essential work of fracture analysis$

Effects of gauge length and strain rate on fracture toughness of polyethylene terephthalate glycol (PETG) film using the essential work of fracture analysis

Polymer Engineering & Science, 2000

Page 1. Effects of Gauge Length and Strain Rate on Fracture Toughness of Polyethylene Terephthala... more

$Research paper thumbnail of Essential work of fracture (EWF) analysis for short glass fiber reinforced and rubber toughened nylon-6$

Essential work of fracture (EWF) analysis for short glass fiber reinforced and rubber toughened nylon-6

Polymer Engineering & Science, 2003

$Research paper thumbnail of Effect of strain rate on the fracture toughness of some ductile polymers using the essential work of fracture (EWF) approach$

Effect of strain rate on the fracture toughness of some ductile polymers using the essential work of fracture (EWF) approach

Polymer Engineering & Science, 2000

Download

Correction of the measurement of fiber length of short fiber reinforced thermoplastics

Composites Part A: Applied Science and Manufacturing, 2002

... People&amp;amp;amp;#x27;s Republic of China. b Department of Manufacturing Engineering an... more

Fracture behaviour of polypropylene films at different temperatures: assessment of the EWF parameters

Polymer, 2001

Emma Ching

Related Authors

Uploads

Papers by Emma Ching

Log In