硅酸盐学报

高应变率加载下应变硬化水泥基复合材料动态压缩行为及损伤特性

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郭伟娜 ¹ , 冯庆悦 ¹ , 王彦懿 ¹ , 金佳怡 ¹ , 高立堂 ¹ , 王鹏刚 ¹^,² , 鲍玖文 ¹^,² , 田玉鹏 ¹ , 雷东移 ¹^,²

硅酸盐学报 | 研究论文 2025,53(11): 3250-3257

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硅酸盐学报 |研究论文 2025 , 53 (11) : 3250 -3257

高应变率加载下应变硬化水泥基复合材料动态压缩行为及损伤特性

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郭伟娜¹, 冯庆悦¹, 王彦懿¹, 金佳怡¹, 高立堂¹, 王鹏刚¹^,², 鲍玖文¹^,², 田玉鹏¹, 雷东移¹^,²

作者信息

^1．青岛理工大学土木工程学院，山东青岛 266520

^2．青岛理工大学，山东省蓝色经济区工程建设与安全协同创新中心，山东青岛 266033

通讯作者:

田玉鹏（1991—），男，博士，副教授。

作者简介:

郭伟娜（1992—），女，博士，讲师。

Dynamic Compressive Behavior and Damage Characteristics of Strain-Hardening Cementitious Composite under High Strain Rate Loading

Weina GUO¹, Qingyue FENG¹, Yanyi WANG¹, Jiayi JIN¹, Litang GAO¹, Penggang WANG¹^,², Jiuwen BAO¹^,², Yupeng TIAN¹, Dongyi LEI¹^,²

Affiliations

^1.College of Civil Engineering, Qingdao University of Technology, Qingdao 266520, Shandong, China

^2.Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao University of Technology, Qingdao 266520, Shandong, China

Corresponding Author:

TIAN Yupeng (1991-), male, Ph.D., Professor. E-mail: tianyupeng@qut.edu.cn

GUO Weina (1992-), female, Ph.D., Lecturer. E-mail: guoweina@qut.edu.cn

出版时间: 2025-11-20 doi: 10.14062/j.issn.0454-5648.20250352

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摘要

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为了解纤维增强水泥基复合材料在动态荷载下的抗冲击性能，本工作通过霍普金森压杆试验研究高应变率下应变硬化水泥基复合材料（SHCC）的力学行为及损伤形式，并利用高速数字相关图像（DIC）技术对冲击过程中SHCC表面全场应变演变形式进行分析；同时，采用X-CT对加载后SHCC的内部损伤进行扫描分析。结果表明：高应变率加载下，随着应变率的增加SHCC的动态峰值应力和吸能能力逐渐增加，表明其具有应变率敏感性，并发现动态峰值应力对应变率的敏感性要明显大于吸能能力；DIC分析得到试样的竖向膨胀明显大于侧向压缩。据X-CT扫描结果可知，试样边缘位置处裂缝数目要明显多于试样中心，且裂缝分布较密，同时同一起裂点位置处出现多条裂缝，这是SHCC具有优异的动态力学性能的重要原因。

关键词

高应变率 / 数字图像相关技术 / 全场应变演化 / 动态力学性能 / 应变率效应

Abstract

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Introduction

Strain Hardening Cementitious Composite (SHCC) is one kind of engineered materials designed based on the principles of mesoscale and fracture mechanics. It exhibits a tensile strain capacity of up to 3%-8%, which are approximately 300~800 times greater than ordinary concrete. SHCC has been successfully used in the rehabilitation of dams and bridge decks in Japan owing to its excellent mechanical properties. These structures withstand not only static loads but also potential dynamic impact loads during service. To accelerate the application of SHCC in seismic-resistant structures, blast-resistant structures and other critical infrastructure, it is essential to have knowledge of its dynamic mechanical properties and failure mechanisms. Therefore, this study characterized the mechanical behavior and failure modes of SHCC under high strain rate loading using Split Hopkinson Pressure Bar (SHPB) testing, with high-speed digital image correlation (DIC) capturing full-field strain evolution on specimen surfaces during impact tests. X-ray computed tomography (X-CT) technology was used to observe the internal damage of SHCC after high strain rate loading. The influences of strain rate on the dynamic peak stress, energy absorption capacity, dynamic growth factor, full-field dynamic strain distribution, internal damage form and microstructure of SHCC were investigated.

Methods

This study adopted Ordinary Portland cement 42.5 (GB175—2023, with an average particle size of 27 μm and the particles of 3-30 μm account for about 70%) and Class I fly ash (GB1596—2017, with a particle size less than 10 μm account for more than 80%) as cementitious materials. The quartz sands with a maximum particle size of 0.3 mm were used as fine aggregates. SHCC samples were prepared using PVA fiber produced by Kuraray, Japan. Meanwhile, the polycarboxylate superplasticizer (provided by Nanjing Subote New Materials Co., Ltd.) was added to enhance the workability, ensuring uniform fiber dispersion of the slurry.

After mixing, the slurry was cast into molds, followed by vibration, and demolded after a 24 h curing period under standard laboratory conditions. Specimens were then cured under standard conditions until testing age. Static compression tests were employed using 70.7 mm cube specimens. Moreover, dynamic properties were evaluated using a SHPB system with ϕ48×25 mm cylindrical specimens. During impact loading, high-speed industrial camera was used to captured specimen deformation for subsequent VIC-2D digital image correlation analysis. The damaged SHCC samples after high strain rate loading were scanned using X-ray computed tomography and observed with scanning electron microscope (SEM).

Results and discussion

The dynamic compressive stress-strain curve of SHCC presents typical three-stage characteristics under high strain rate loading: linear elastic deformation stage, nonlinear strain hardening stage and damage softening stage. Dynamic compressive stress-strain curves of SHCC exhibit strong dependence on strain rate. At higher strain rates, the dynamic compressive response of SHCC exhibits significant strain hardening, primarily governed by fiber bridging effects and secondarily enhanced by compaction of micro-defects. The dynamic peak stress of SHCC increases significantly with strain rate, demonstrating a pronounced strain rate sensitivity. Simultaneously, the dynamic peak stress of SHCC increases substantially at high strain rates. This enhancement primarily arises from the significantly shorter stress wave propagation time compared to the characteristic relaxation time of internal defects under high strain rate loading. Consequently, stress waves preferentially propagate through high-strength regions (e.g., matrix grains and fiber reinforcements), inducing localized stress concentrations. The energy absorption capacity of SHCC increases with the increase of strain rate. When the strain rate exceeds 180 s^-1, E_d shows an approximate exponential growth trend, reaching 546.12 kJ/m³ at 188 s^-1, with a relative increase of about 106.42%, demonstrating exponential growth behavior and significant strain rate strengthening. This energy absorption surge primarily stems from synergistic multi-scale damage mechanisms. At identical strain rates, the dynamic increase factor for stress demonstrates both a higher mean value and greater variability than that for energy, reflecting its stronger dependence on strain rate effects. This indicates greater strain rate sensitivity in dynamic peak stress than energy absorption capacity, confirming the dynamic peak stress is more susceptible to strain rate.

Conclusions

The main conclusions of this paper are summarized as following. SHCC exhibits strain rate sensitivity of dynamic mechanical properties, with both peak stress and energy absorption capacity increasing significantly under high strain rate loading. The sensitivity of dynamic stress to strain rate is significantly greater than that energy absorption capacity. DIC analysis shows that the vertical expansion of the specimen is substantially more significant than the lateral compression. X-CT analysis reveals significantly denser crack distribution near specimen edges compared to the central region. Moreover, multiple cracks appear at the same crack point, which is an essential reason for the excellent dynamic mechanical properties of SHCC.

Key words

high strain rate / digital image correlation / full-field strain evolution / dynamic mechanical properties / strain rate effect

引用本文

郭伟娜, 冯庆悦, 王彦懿, 金佳怡, 高立堂, 王鹏刚, 鲍玖文, 田玉鹏, 雷东移. 高应变率加载下应变硬化水泥基复合材料动态压缩行为及损伤特性. 硅酸盐学报, 2025 , 53 (11) : 3250 -3257 . DOI: 10.14062/j.issn.0454-5648.20250352

Weina GUO, Qingyue FENG, Yanyi WANG, Jiayi JIN, Litang GAO, Penggang WANG, Jiuwen BAO, Yupeng TIAN, Dongyi LEI. Dynamic Compressive Behavior and Damage Characteristics of Strain-Hardening Cementitious Composite under High Strain Rate Loading[J]. Journal of the Chinese Ceramic Society, 2025 , 53 (11) : 3250 -3257 . DOI: 10.14062/j.issn.0454-5648.20250352

基金

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国家自然科学基金(U23A20673; 52478261; 52508281)

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2025年第53卷第11期

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文章信息

doi: 10.14062/j.issn.0454-5648.20250352

接收时间：2025-04-30
首发时间：2026-10-21
出版时间：2025-11-20

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收稿日期：2025-04-30
修回日期：2025-06-04

基金

国家自然科学基金(U23A20673; 52478261; 52508281)

作者信息

^1．青岛理工大学土木工程学院，山东青岛 266520

^2．青岛理工大学，山东省蓝色经济区工程建设与安全协同创新中心，山东青岛 266033

通讯作者:

田玉鹏（1991—），男，博士，副教授。

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https://castjournals.cast.org.cn/joweb/gsyxb/CN/10.14062/j.issn.0454-5648.20250352

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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