GB/T 34171-2017 in English

VALID

Test method for flexural property of thin and ultrathin glass--Three-point bending method

Issued on:2017-09-07
Implemented on:2018-08-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	GB/T 34171-2017
Document status:	VALID
Title in English:	Test method for flexural property of thin and ultrathin glass--Three-point bending method
Title in Chinese:	薄与超薄玻璃弯曲性能试验方法三点弯曲法
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-09-07
Implemented on:	2018-08-01
ICS Classification:	81.040.10-Raw materials and raw glass
Chinese Classification:	Q30-Ceramic and glass in general
Professional Classification:	GB-National Standard
Related Keywords:	bending strength test method three-point bending method test method three-point bending method introduction foreword thin glass ultra-thin glass base beam definition thickness
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strain external standard three-point method three-point bending rate three-point bending Three-point bending performance Three-point bending test test piece size single point curve method Three point bending Steel three-point bending test Four point bending experiment Three-point bending sample test Method for measuring curvature of glass Standard three-point bending beam standard three-point bending Glass three-point bending experiment Three-point bending strength test piece Plastic resin three-point bending test Three point bending beam size Standard Dimensions for Three-Point Bending Test Carbon fiber bending performance test method curvature of glass Bending performance test method three-point bending method Three-point bending test of aluminum alloy Three point bending span Three-point bending test machine Aluminum alloy three point bending Bending glass machine Three-point bending test passed Glass 3 point bending Three point bending test procedure Three-point bending strength of glass Concrete three-point bending test Three point bending result Bending property measurement Three-point bending test fatigue performance Three point bending thickness Three-point bending breaking strength Three-point bending test method for materials Three-point bending test machine Four point bending of glass Three point bending definition Four point bending test specification Energy spectrum ultra-thin window Rubber three-point bending Three-point curved glass Three-point bending of glass Four-point bending of glass Aluminum alloy three point bending Aluminum alloy three point bend Three point bending span 30 three point bending Alloy three-point bending GBT34171 GB/T 34171-2017 Flexural modulus of glass Four point bending test of glass bender method Three-point bending of rock mass five-point song sdspage strip bend curved glass astm Glass warpage test method Three-point bending test formula Three-point bending compressive strength test Three point test calculation method Three-point bending test method bending elastic modulus Three-point bending test of silicon carbide materials Three-point bending test of ceramic materials Concrete four-point bending test method span ratio of three point bending Principles and methods of dynamic triaxial testing Glass resistant to bending Bar three-point bending test Board level bending test Three-point bend test of pipe fittings Ultra-thin vapor chamber performance test method Mechanical properties Four-point bending loading test Metal three-point bending test Glass bending modulus Cement three-point bending test Measurement method of three-point bending displacement of concrete Three Point Bend Test International Curved style Characteristics of triaxial testing methods Round tube three-point bending test Three point bend national test Ultra-thin glass specifications Three point bend test method Photovoltaic glass four-point bending Three point bending test Standard method for three-point bending strength test Coating bending performance test Graphite electrode three-point bending Three-point bending specimen Beam four-point pure bending test Three Points Bend International Mortar four-point bending test Related to bending properties of ring specimens Three-point peak method

《GB/T 34171-2017薄与超薄玻璃弯曲性能试验方法三点弯曲法》由TC447（全国工业玻璃和特种玻璃标准化技术委员会）归口，主管部门为中国建筑材料联合会。

Introduction

Foreword

This standard GB/T 34171-2017 specifies the terms and definitions, specimens, test equipment, pre-test preparation, bending strength test, bending load-deflection test, critical curvature radius calculation and test report for testing the bending properties of thin and ultra-thin glass using the three-point bending method. The standard is applicable to the determination of the bending strength, failure deflection, bending load-deflection curve and critical curvature radius of thin and ultra-thin glass with a thickness of less than 3 mm under three-point bending conditions.

Comparison of standard frames

Technical requirements	Thin glass	Ultra-thin glass	Base beam
Definition	Thickness 1.1mm ≤ h < 3mm	h < 1.1mm	Stainless steel material with elastic modulus ≥ 200GPa
Sample preparation	Polishing chamfer (0.2±0.05)mm × 45°	Polishing and grinding to B1 level	Processing length 120mm ±1mm, width 20mm ±0.5mm, thickness 5mm ±0.1mm beam

Explanation of professional terms

Combined beam three-point bending method: A bending strength test method that simulates the tensile stress characteristics of ultra-thin glass under three-point bending conditions by bonding ultra-thin glass to a base beam.

Actual application case:
A car windshield manufacturer uses this method to test 0.8mm thick ultra-thin glass to ensure its safety performance under high temperature and high pressure environments. By calculating the critical curvature radius R=6000PL/(Ebh³), it is verified that the bending strength of the glass σ_f=αP_c yc L/(4I) meets the industry standard.

Technology evolution analysis

The traditional three-point bending test method is mainly suitable for glass materials of ordinary thickness. With the increasing demand for ultra-thin glass in the fields of architecture and automobile, GB/T 34171-2017 introduced the combined beam three-point bending method to make up for the shortcomings of traditional methods in testing ultra-thin glass. The technical evolution of this standard is reflected in the following aspects:

Innovation: The combined beam three-point bending method was proposed for the first time, which solved the problem of direct testing of ultra-thin glass.
Applicability: It is applicable to ultra-thin glass with a thickness of less than 1.1mm and thin glass with a thickness of less than 3mm.
Accuracy: The acoustic emission sensor and deflection measuring device are used to realize real-time monitoring of the glass fracture process.

Implementation recommendations

To ensure the effective implementation of the standard, the following measures are recommended:

Test equipment calibration: Regularly calibrate the test machine, deflection measuring device and acoustic emission sensor to ensure that the accuracy meets the requirements.
Specimen preparation training: Provide professional training to operators to ensure the accurate preparation of thin and ultra-thin glass specimens.
Data recording specifications: Strictly record the key parameters during the test in accordance with standard requirements and keep a complete test report.

More samples: QC/T 942-2021 DL/T 368-2010 GB 50021-2001(2009)

Sample only — not a preview of GB/T 34171-2017

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